BEIJING, Beijing, June 14 (Zhong Qing) On the 13 th, Sheng Laiyun, spokesperson of the National Bureau of Statistics and director of the National Economic Statistics Department, said at the press conference on the operation of the national economy in May that "the national economy continued this year’s smooth operation and steady progress, and positive factors continued to accumulate."

　　How to understand "stability" and "progress" here? Sheng Laiyun affirmed the overall stability of China’s economic operation from five aspects: industrial production, service industry development, market sales, employment and price. For "Jin", he believes that it is mainly reflected in the steady advancement of structural adjustment and transformation and upgrading.

　　In order to find the "structural changes" behind these economic developments, the reporter from Zhongxin.com combed five macroeconomic data and told you how the national economy "strives for progress steadily".

　　Investment structure

　　The growth rate of investment in energy-intensive manufacturing industry is falling.

　　In the case of relatively stable prices and industrial operation, the investment data of one of the "Troika" showed a downward trend.

　　According to the data released by the Bureau of Statistics on the 13th, from January to May, the national investment in fixed assets (excluding farmers) was 18,767.1 billion yuan, a nominal increase of 9.6% year-on-year, and the growth rate dropped by 0.9 percentage points compared with that in January-April.

　　"The growth rate of investment in fixed assets has indeed declined somewhat, but the investment structure is being optimized." Sheng Laiyun pointed out that high-tech investment and service industry investment in fixed assets investment have maintained a relatively fast growth rate, and the proportion is increasing; However, the growth rate of investment with high energy consumption, especially in industries with overcapacity, is declining.

　　Specifically, investment in high-tech industries increased by 13.6% in the first five months, which was 4 percentage points higher than the growth rate of total investment; In addition, the investment in industrial technological transformation is obviously improving, with an increase of 14.9% from January to May, which is 5.3 percentage points higher than the average growth rate; The proportion of investment in service industry was 57.4%, an increase of 1.2 percentage points over the same period of last year.

　　On the contrary, investment in industries with high energy consumption and overcapacity began to decline. Sheng Laiyun pointed out that the investment in the six high-energy-consuming manufacturing industries decreased by 1.5%, of which the investment in coal mining and washing industries decreased by 32.9%.

　　At the monthly economic data conference held on the 13th, the narrowing of the growth rate of private investment attracted media attention. The data shows that private investment in fixed assets increased by 3.9% year-on-year in the first five months, which was 1.3 percentage points lower than that in the first four months. Will this drag down China’s economic growth?

　　"The slowdown in the growth rate of private investment shows that the endogenous power of the economy needs to be strengthened", Sheng Laiyun bluntly answered the above questions, but this endogenous downward pressure does not necessarily mean the inevitable decline of the economy, which is related to the adjustment of China’s economic structure and power conversion.

　　Sheng Laiyun explained in detail two reasons for the decline of private investment: on the one hand, the ex-factory price of industrial products has continued to decline in recent years, especially the profit growth rate of some industries with overcapacity may decline, which has affected investment enthusiasm; On the other hand, it is related to the lack of access to private capital in some fields, which limits the entry of private capital to some extent.

　　Foreign trade structure

　　The import and export of private enterprises increased and their proportion increased.

　　Just last week, the General Administration of Customs released the latest import and export data, and the monthly import growth rate turned positive for the first time in 19 months.

　　According to customs statistics, the total import and export volume in May was 2,019 billion yuan, a year-on-year increase of 2.8%. Among them, exports were 1,171.9 billion yuan, an increase of 1.2%; Imports reached 847.1 billion yuan, up by 5.1%. Import and export balance, with a surplus of 324.8 billion yuan.

　　According to Xinhua News Agency, people in the industry believe that the external environment will be unstable and uncertain in the next few months, and the downward pressure on imports and exports will remain high. However, China’s series of foreign trade policies and measures adhere to the problem orientation, pay more attention to the transfer of processing trade to the central and western regions, and pay more attention to the adjustment of foreign trade structure and encourage innovation, which will create a more favorable environment for foreign trade development, effectively boost the confidence of import and export enterprises and enhance their ability to take orders.

　　From the data, the effect of structural adjustment can still be seen in the import and export of foreign trade in the first five months, and the import and export of private enterprises continued to grow and the proportion increased.

　　In the first five months, the import and export of private enterprises was 3.56 trillion yuan, up 6.9%, accounting for 38.8% of China’s total foreign trade, up 3.6 percentage points over the same period last year.

　　In terms of export product structure, the export of mechanical and electrical products declined, while the export of traditional labor-intensive products such as textiles and clothing increased. In the first five months, the export of mechanical and electrical products in China was 3.03 trillion yuan, down 2.5%; In the same period, the total export of seven categories of labor-intensive products, including clothing, textiles, furniture, footwear, plastic products, toys and luggage, increased by 2%, accounting for over 20% of the total export value.

　　consumption structure

　　Online retail continues to grow rapidly and consumption continues to upgrade.

　　As the "new kinetic energy" of economic development, the growth rate of consumption is lower than expected from the data performance, but in Sheng Laiyun’s view, the transformation and upgrading of the consumer goods market has made new progress.

　　In May, the total retail sales of social consumer goods reached 2,661.1 billion yuan, a nominal increase of 10.0% year-on-year and 0.76% quarter-on-quarter. From January to May, the total retail sales of consumer goods increased by 10.2% year-on-year. .

　　"Sales in industries related to the improvement of residents’ consumption quality and quality improvement have maintained rapid growth, and the trend of consumption upgrading continues to appear," Sheng Laiyun said.

　　For example, automobile sales in May increased by 8.6% year-on-year, 3.5 percentage points faster than that in April, which played an important role in supporting the steady growth of retail sales in that month. In the first five months, the sales of sports and entertainment products nationwide increased by 12.9% year-on-year, and the sales of Chinese and western medicines increased by 14.4% year-on-year.

　　Lin Tao, a senior statistician of the Department of Foreign Trade and Economic Cooperation of the National Bureau of Statistics, also affirmed the sales growth of consumption-upgrading commodities, saying that "the sales of new formats, new products and some consumption-upgrading-related commodities maintained rapid growth".

　　From January to May, online retail sales continued to grow rapidly, with the national online retail sales reaching 1,808.9 billion yuan, a year-on-year increase of 27.7%. Among them, the national online retail sales of physical goods increased by 25.9% year-on-year, the growth rate was 0.3 percentage points faster than that of January-April, and 15.9 percentage points higher than the growth rate of total retail sales of social consumer goods.

　　industrial structure

　　The overall stable structure of industrial production is continuously optimized.

　　At the press conference held on June 13, Sheng Laiyun summed up the overall situation of the national economy operation last month with the words "overall stability, steady progress".

　　He specifically mentioned that the word "stable" is first manifested in the relatively stable industrial production. In May, the added value of industrial enterprises above designated size increased by 6%, the same as in April. There have been some positive changes in industrial production. The added value of manufacturing industry increased by 7.2%, up 0.3 percentage points from last month, and the data of industrial electricity consumption rose by 0.3 percentage points.

　　From the data, the growth rate of service industry continues to be faster than that of industry, which means that the proportion of service industry in GDP continues to increase. At the same time, the industrial structure continues to be optimized, and the growth rate of high-tech industries and advanced equipment manufacturing industries is obviously accelerating, and the proportion is also constantly increasing.

　　In May, the added value of high-tech industry and equipment manufacturing industry increased by 11.5% and 8.5% respectively year-on-year, and the growth rate was 1.8 and 0.6 percentage points higher than that of last month, 5.5 and 2.5 percentage points faster than that of industries above designated size.

　　Another data reflecting the operation of the industrial economy is improving synchronously. In May, the PPI (ex-factory price of industrial producers) decreased by 2.8% year-on-year, which was 0.6 percentage points lower than that of the previous month, and the decline narrowed for five consecutive months.

　　Peking University Economic Research Institute’s prediction of the future trend of industrial product prices shows that the year-on-year decline of PPI should continue to narrow due to the influence of low cardinal utility.

　　real estate market

　　The growth rate of sales data of "destocking" commercial housing began to decline

　　After the "crazy March", the real estate market gradually returned to rationality in May, but the sales data still maintained a rapid growth.

　　In the first five months, the national commercial housing sales area was 479.54 million square meters, up 33.2% year-on-year, and the growth rate dropped by 3.3 percentage points compared with that in January-April. Among them, the residential sales area increased by 34.2%. The national sales of commercial housing reached 3,677.5 billion yuan, up 50.7% year-on-year, and the growth rate dropped by 5.2 percentage points.

　　In response to the narrowing of the cumulative growth rate of commercial housing sales data, Yan Yuejin, research director of the think tank center of Yiju Research Institute, told the reporter of Zhongxin.com that "this is related to the current cooling of the property market in second-tier cities". Previously, Hangzhou, Suzhou, Nanjing and other cities were basically popular. There has been a decline in transactions.

　　The sustained and rapid growth of sales data has effectively helped the "destocking" of the national property market. At the end of May, the area of commercial housing for sale was 721.69 million square meters, a decrease of 5.21 million square meters compared with the end of April.

　　Sheng Laiyun said that real estate inventory is the highlight of this year’s destocking task, and real estate inventory has been declining for several months. "The area for sale of commercial housing continues to decrease, and the effect of destocking has begun to show." Li Jiao, senior statistician of the Investment Department of the National Bureau of Statistics, said when interpreting real estate data.

　　In Yan Yuejin’s view, while "destocking", it is even more necessary to be alert to the risk of rapid rise in housing prices. "Especially in some third-and fourth-tier cities, similar to the surrounding areas of big cities such as Kunshan, Wuxi, Dongguan and Langfang, the effect of destocking is good, but the price increase is also obvious, which is the content that needs attention in subsequent destocking." Yan Yuejin said. (End)

As one of the five international auto shows, Tokyo Auto Show will open on October 21st, and the exhibition period will be extended to 17 days for the first time, surpassing the Paris Auto Show’s 16 days, and it will become the longest major international auto show in the world. Sina Auto will report this auto event live for you all the time. The following is a picture of the participating sports car Bugatti Veyron.

　　Qilu Evening News reported on August 19th (trainee reporter Zhao Zhuoqi) that the vehicles in the residential area were zoned, but it was difficult to check the monitoring. Recently, Ms. Xing told Qilu Evening News that she was a resident of Yuhan North District, Shizhong District. On August 13, she parked her private car in the normal parking space of her own community, but when she picked it up later, she found that the car was maliciously scratched and the pasted ornaments were also removed.

　　"My car was parked in the community, and it didn’t move for about three days. When I wanted to drive out again and take things out of the trunk, I found that the car was scratched." Ms. Xing said that at that time, there were nearly 20 palm-length cuts in the headlights at the left rear of her private car. In addition, the "Gecko" ornaments pasted on the back of the car were also abruptly removed. "The car is placed in the regular parking space of the community and will not affect the passage of other vehicles." Ms. Xing stressed.

　　The reporter saw from the photos provided by Ms. Xing that there were more than a dozen scratches on the left rear of the car, which seemed to be caused by sharp objects being scratched back and forth. In addition, a "gecko" in the lower left corner of the trunk of the car was also removed, leaving only the head, tail and limbs.

　　Because there was monitoring not far from the parking, Ms. Xing found the neighborhood Committee and wanted to see the surveillance video of the day. "At that time, I proposed to check the monitoring. The staff of the neighborhood Committee said that the monitoring display had been damaged for a long time and had been reported to the office. Now it has not been repaired and it is impossible to see it." Ms. Xing said that general video surveillance can be stored for 15 days. If it can be repaired, you may be able to see the situation that day.

　　Ms. Xing said that when she asked when the monitor could be repaired, the staff of the neighborhood Committee only replied "I don’t know". "If it’s just because the monitor is broken, you should give a statement about whether and when it can be repaired. It’s disturbing that you can’t check it now." Ms. Xing questioned.

　　Since the monitoring has already been reported, why is it delayed in maintenance? "There are two main reasons why the monitoring can’t be viewed. One is because the old residential area was renovated in the early stage of Yuhan North District, and some lines were cut off. Another reason is that the short circuit of the wire occurred on rainy days, which caused the monitoring display to be burned out. " Mr. Liu, a staff member of the Ping An Construction Office of Liulishan Sub-district Office, explained.

　　"At that time, the monitoring of Yuhan North District was carried out by two companies. Now these two companies have come to see it. It is only because the lines are on the ground after landing, the construction and maintenance are difficult, and the rain has delayed the time." Mr. Liu emphasized that the monitoring display was caused by short circuit of wires, so it was necessary to wait until the construction party came up with a plan before installing it. "If the location of the owner’s car is monitored, it should be available this Thursday." Mr. Liu said.

Xiaonan and Xiaomei run a fruit shop. They want to earn more money, but they don’t want to waste unsold fruits, so they often cut off some bad fruits and eat them themselves.

However, these seemingly good fruits are the main cause of their liver cancer.

Fruit is an essential part of our daily diet.

Fruits are rich in vitamins, minerals and antioxidants, which can provide the nutrients we need, help regulate our metabolism and promote the normal operation of our body functions.

Therefore, it is very important for our overall health to choose and eat fruits correctly.

These two fruits have been included in the "cancer blacklist"

1. Rotten and moldy fruit: Even if there is only one small mildew spot, the whole fruit will be toxic.

Most fruits contain a lot of juice, sugar and nutrients, so they are an ideal environment for mold growth. When mold grows in large quantities, fruits will begin to rot gradually.

Mold is actually a big family. Usually, mold does not cause fatal harm to human body. But under some suitable conditions, the problem of mold may be more serious than we thought.

For example, in rotten fruits, the most common toxins are patulin, ochratoxin A, aflatoxin and arthrosporin.

These toxins are harmful to human health to varying degrees, and may even lead to cancer, deformity or death.

Penicillin: It can pollute all kinds of fresh fruits and juices, and can damage the intestines and kidney function. The International Agency for Research on Cancer (IARC) lists it as a class 3 carcinogen.

Ochratoxin A: It is toxic to liver and kidney, and can pollute a small number of fruits, such as rotten dried figs and apricots. IARC classified it as a class 2B carcinogen.

Aflatoxin: A strong carcinogen, it can pollute rotten fruits such as sugarcane, raisins and dried figs. IARC classified it as a class 1 carcinogen.

Arthrospermycin: It is a definite carcinogen, which can pollute rotten sugarcane. If pregnant women eat it carelessly, it may lead to fetal malformation.

Therefore, it is recommended not to eat any rotten fruit, even if the bad parts are cut off, there may be toxin residues.

2. Areca catechu: a primary carcinogen

Areca catechu is a first-class carcinogen, and this conclusion was announced by the International Center for Research on Cancer in 2003.

Chewing betel nut for a long time is equivalent to subjecting the oral mucosa to both physical and chemical blows, so that it is constantly injured.

Long-term injury is a very dangerous carcinogen, and many organ cancers are related to persistent injuries, such as lung cancer, liver cancer, esophageal cancer and so on.

In these two cases, the fruit can be eaten after cutting the wound.

1. Low temperature frostbite causes

In the low temperature storage environment, the activity of superoxide dismutase in fruits decreases, and the free radicals in cells cannot be eliminated in time.

With the increase of the number of free radicals, they will change the permeability of fruit cell membrane, thus destroying the cell structure.

In addition, the low temperature environment will also improve the activity of pectin esterase in fruit, which will decompose insoluble pectin in pulp and make the surface of fruit "soft and rotten".

But in fact, the "frostbitten" fruit is only damaged by cells and does not produce microorganisms or toxins, so it can continue to be eaten.

2. Bumped and crushed fruit

In the process of collision, the cytoplasm in the fruit dissolves, and the colorless phenols in the cells are transformed into colored quinones.

In essence, these fruits are not infected by harmful pathogens such as bacteria, so short-term eating will not affect the body.

Of course, if the fruit in your house has been stored for a long time, and it is not clear what caused it to be "a little rotten", it is better to throw it away.

Read the original text

　　After the annual turnover increased by four times, Guangdong Jiaying Pharmaceutical Co., Ltd. tasted the "sweetness" of scientific research and development. Thanks to the scientific research achievements of Su Jianyu, a science and technology correspondent and professor of South China University of Technology, Jiaying Pharmaceutical has not only become bigger and stronger as a "fist product" of the company, but also intensively forged a "sharp knife product"-a gold medal double throat powder. Relying on the advantages of South China Institute of Technology in scientific research and development, transformation of achievements, etc., Su Jianyu’s team, together with Jiaying Pharmaceutical, established Guangdong Huaqingyuan Biotechnology Co., Ltd., and took the technical achievements of school experts as a share. By the end of 2022, Huaqing Garden had benefited more than 3,000 plum tree growers in Meizhou and surrounding cities and counties, and the accumulated industrial output value exceeded 500 million yuan.

　　How can colleges and universities give better play to the agglomeration effect of education, science and technology and talents, and jointly promote the multiplication effect of high-quality development with the region? South China University of Technology adheres to the concept of "integration into development and promotion of development", with science and technology commissioners and technical cooperation between schools and enterprises as the "point", leading enterprises in the industry deeply cooperating to build school-enterprise R&D institutions as the "line", five research institutes of the school and the platform of the National University Science Park as the "surface", creating a scientific research service system combining "point, line and surface" and an innovative system of technology transfer and transformation of scientific and technological achievements, which has set up the upgrading and development of enterprises, industries and regions.

　　Docking with "points" to help enterprises plant "cash cows"

　　Industrial robots are known as "the jewel in the crown of manufacturing". However, it turns out that the core technologies such as motion control and calibration of domestic industrial robots are subject to people. How to realize the self-control of core technology? Zhang Tie, a professor from the School of Mechanical and Automotive Engineering of South China University of Technology, joined hands with guangzhou cnc Equipment Co., Ltd. to take the lead in developing domestic industrial robots in China and realize industrialization.

　　As an established engineering university, South China Institute of Technology has been insisting on serving enterprises for many years. In recent years, the school has strengthened the "point" docking between schools and enterprises, and selected science and technology commissioners and student assistants of commissioners according to the needs of enterprises. They have sent scientific research achievements and talents to research and develop new products, solve production problems and strengthen the independent research and development system.

　　"Our team and guangzhou cnc have been working closely together for 17 years. Behind this is that the school encourages teachers with a number of measures to turn scientific research results into the productivity of enterprises. " Zhang Tie introduced that the school treats horizontal and vertical projects equally when evaluating professional titles. The "policy dividend" has stimulated the enthusiasm of science and technology commissioners to serve enterprises.

　　"Our school has opened a promotion channel for achievement transformation personnel, added a series of engineering and achievement promotion, and relaxed the evaluation criteria for scientific research personnel who serve as enterprise science and technology commissioners and engage in achievement transformation in various demonstration areas of the school. At the same time, our school has transformed the performance of scientific and technological achievements obtained by scientific and technological personnel in enterprises into the evaluation system of scientific and technological personnel in schools. " Zhang Xichun, secretary of the Party Committee of South China University of Technology, said that the school also used "real money and silver" to positively motivate science and technology commissioners and increase the income of scientific researchers. The school specially formulated the "Ten Articles of South China University of Technology" to promote the transformation of scientific and technological achievements and innovation and entrepreneurship, and clearly rewarded 70% to 95% of the results transformation income to researchers at one time.

　　By the end of 2022, South China Institute of Technology had sent over 1,600 enterprise science and technology commissioners and nearly 10,000 student assistants. They stationed in more than 1,000 enterprises in 21 cities in Guangdong, which directly or indirectly generated more than 10 billion yuan in economic benefits.

　　In the past five years, South China Institute of Technology has also cooperated with 60 small and medium-sized enterprises in Qingyuan and Heyuan, Guangdong Province, and undertaken more than 400 cooperation projects in Industry-University-Research, training about 5,000 rural grassroots technicians and farmers, benefiting about 120,000 farmers through radiation, and indirectly increasing the output value of rural industries by several billion yuan. The team of 20 rural science and technology commissioners went deep into the grassroots and towns to help the high-quality development of agricultural products processing, agricultural tourism and other industries.

　　Connect "points" into "lines" to accurately meet the innovation needs of leading enterprises

　　If a large customer suddenly adjusts the product demand and the production line lacks flexible manufacturing enterprises, it is likely that there will be overcapacity. How to quickly adapt to the new trend of diversified, fast-paced and customized product production?

　　With the help of Wei Wu, a professor of South China University of Technology, Guangzhou Institute of Construction and Research has built a flexible production line for inorganic artificial stone, which can produce artificial stone plates in various varieties, small and medium batches, with an annual output value of over 100 million yuan. The second production line has been put into construction because of its high efficiency.

　　Flexible manufacturing is a high-tech industry with high R&D investment, and it is generally difficult for a single flexible manufacturing enterprise to undertake R&D investment alone. In order to better break through the common key technical problems that restrict industrial development, South China Institute of Technology has joined more than 80 units including well-known enterprises, scientific research institutions and universities to jointly build Guangdong Flexible Manufacturing Industry Technology Innovation Alliance, and strengthen technical cooperation, project cooperation and information sharing. Enterprises in the school alliance, relying on technological advantages, carry out first demonstration, and drive more manufacturing enterprises in Guangdong to carry out flexible manufacturing transformation.

　　Based on the layout of key industries in Guangdong-Hong Kong-Macao Greater Bay Area, South China University of Technology aims at the new generation of information technology, biology and health, focusing on leading enterprises in the industry, strengthening market orientation, and relying on "college+research institute+R&D center+industry alliance", accelerating the connection from "point" to "line". The "line" system of technological innovation combined with Industry-University-Research has improved the breadth and validity of the transformation and promotion of scientific and technological achievements in schools.

　　How can talents, disciplines and enterprises’ advantages in engineering research and development work together? South China Institute of Technology "hands in hand" Midea Group to build an innovative carrier. A number of joint laboratories, such as the Joint Innovation Center for Environment, Energy and Health Technology, have produced a number of top-notch applied technological achievements according to the innovation needs of enterprises, and promoted the innovation and development in the field of smart home appliances.

　　"Our school gives full play to its geographical advantages in the hinterland of Greater Bay Area, takes the initiative to attack, actively connects with leading enterprises in many industries such as Guangzhou Automobile and Midea, forms a number of provincial and municipal Industry-University-Research innovation alliances, and carries out Industry-University-Research cooperation in depth." Zhang Liqun, academician of China Academy of Engineering and president of South China Institute of Technology, said that the school has integrated the upstream and downstream resources of the industry by strengthening measures such as overall arrangement, project guidance and support, and local support. These "combination boxing" not only promoted the research and development and application of new technologies, new products and new processes, but also promoted the series connection of innovation chain in related industries.

　　In order to promote the supply of science and technology to accurately meet the needs of the industry, South China Institute of Technology has strengthened financial support, set up special funds for the transformation of basic scientific research business expenses in central universities, instigated leading enterprises in the industry to invest more Industry-University-Research cooperation resources, and jointly tackled a large number of innovative technological achievements by schools and enterprises. Since the 18th National Congress of the Communist Party of China, South China University of Technology has signed strategic cooperation agreements with hundreds of leading enterprises such as Midea and Lenovo, and built nearly 200 joint laboratories between schools and enterprises, with a total R&D expenditure of nearly 600 million yuan. The school has undertaken nearly 16,000 projects entrusted by enterprises, with a total fund exceeding 10 billion yuan.

　　In May, 2020, South China University of Technology signed the patent technology of "Plasticizing and Transportation Method and Equipment of Polymer Materials Based on Tensile Rheology" at a price of over 20 million yuan. This technology has been widely popularized in northwest China, which is helpful to solve the problems of "white pollution" of plastic film in Xinjiang.

　　In recent years, South China University of Technology has made patent transformation "blood" smooth, and turned patents in teachers’ hands into enterprise development dividends. The school encourages scientific research teams and leading enterprises in the industry to jointly apply for patents, establish a stable, long-term and win-win cooperation model in Industry-University-Research, and assist leading enterprises to build a patent pool for intellectual property protection. Since 2009, South China University of Technology has won 50 awards as the first patentee.

　　Take "Line" with "Face" as a catalyst to promote national and regional innovation and development.

　　How to reduce the number of waiting times of vehicles during driving? As an "intelligent brain", Kanganda traffic signal coordination control system integrates the traffic volume and historical operation data of surrounding roads to optimize and coordinate the traffic signal instruction period of each intersection. The system is now "showing its talents" at intersections in more than 3,000 cities in China to alleviate traffic congestion.

　　Kang ‘anda traffic signal coordination control system is developed by South China University of Technology Modern Traffic Engineering Technology Research and Development Center, which can help pedestrians and vehicles at the intersection, shorten the average journey and delay time by about 25% and 30% respectively, reduce the number of stops by about 60%, and reduce the pollutant emission by 4,390 tons annually.

　　Modern traffic engineering technology research and development center is one of the eight research and development centers laid out by Guangzhou Institute of Modern Industrial Technology of South China University of Technology. In recent years, South China University of Technology has actively integrated into the overall innovation system of Greater Bay Area, and jointly built a large-scale innovation platform, so as to bring "surface" with "line" and realize the radiation of "surface". The school and Guangzhou, Dongguan, Foshan and other local governments have jointly established Guangzhou Modern Industrial Technology Research Institute and Sino-Singapore International Joint Research Institute, forming a transformation model of the achievements of the "five institutes and one park" innovation and entrepreneurship demonstration zone. "Five Institutes and One Park" undertakes the school’s innovation achievements, conducts industrialization research in local areas, promotes transformation and incubation, and acts as a catalyst to promote national and regional innovation and development.

　　Among them, Guangzhou Institute of Industry and Research has directly attracted more than 500 million yuan of venture capital, incubating more than 60 enterprises. In the past five years, the revenue of incubating enterprises has exceeded 660 million yuan, and 22 provincial-level high-tech products have been cultivated. Many entrepreneurial projects have won the gold medal in the "internet plus" national competition.　

　　Guangzhou Institute of Production and Research and other "five institutes" strengthen the integration of production and education, and focus on comprehensive technology transfer services such as technology research and development, pilot production, enterprise incubation and talent cultivation. National University Science Park of South China University of Technology, as a "one park", introduces mature technological achievements, establishes enterprises at a fixed price, and accelerates the incubation and transformation of scientific research achievements. The park also set up a special fund for the transformation of achievements, and invested in the transformation of scientific and technological achievements in schools to accelerate the growth of enterprises.

　　In order to connect innovation chain, industrial chain and capital chain, South China University of Technology has also introduced local government investment funds, talents introduction projects and other resources, and accelerated the construction of a chain-type transformation system of scientific and technological achievements based on the "five institutes and one park" of the school.

　　Relying on the technical achievement of South China University of Technology "High Performance Ultra-thin Asphalt Pavement Wear Layer Technology", Huayun Tongda Technology Group Co., Ltd. was founded and settled in Shunde Innovation Park of South China University of Technology Science Park. The company independently developed the technology of high toughness and ultra-thin asphalt wear layer. This "black technology" not only helped speed up the construction and improve efficiency, but also greatly improved the smoothness of the original pavement. Compared with traditional technology, this technology can help save 60% of raw materials and 65% of labor. The technical system has been used in more than 100 important projects such as artificial island passage of Hong Kong-Zhuhai-Macao Bridge. In the second year, the company’s revenue exceeded 100 million yuan, and in the third year, it was awarded the national-level "Little Giant" enterprise.

　　In recent years, South China Institute of Technology’s "Five Institutes and One Park" has attracted over 1 billion yuan of investment, incubating 370 high-tech enterprises, including one listed on the New Third Board, one state-level "Little Giant" enterprise specializing in special innovation, five state-level "Little Giant" enterprises specializing in special innovation and 60 high-tech enterprises. (Reporter Liu Dun correspondent Li Jianyuan Zou Hao)

　　BEIJING, Beijing, May 21 (Reporter Liu Yuying) The "White Paper on Blockchain Industry in China in 2018" released by the Information Center of the Ministry of Industry and Information Technology of China on the 20th said that the blockchain industry in China is in a high-speed development stage and the industrial chain has taken shape.

　　According to the White Paper, by the end of March 2018, the number of blockchain companies with blockchain business as their main business in China had reached 456, from upstream hardware manufacturing, infrastructure and security services to downstream industrial technology application services, to industry investment and financing, media and talent services to ensure industrial development. Companies in various fields have been basically complete, coordinated and orderly, and jointly promoted the industry to move forward.

　　Judging from the geographical distribution of the company, the geographical distribution is relatively concentrated and the industrial agglomeration effect is obvious. Beijing, Shanghai, Guangdong and Zhejiang are still concentrated places for blockchain entrepreneurship, and blockchain enterprises in the four provinces account for over 80%. In addition, China’s top ten provinces with blockchain entrepreneurial activity include Jiangsu, Sichuan, Fujian, Hubei, Chongqing and Guizhou.

　　Judging from the distribution of blockchain industry segments, by the end of March 2018, the number of industry application service companies in blockchain field was the largest, among which the number of companies mainly serving the financial industry reached 86, mainly serving the physical industry. The number of service companies reached 109. In addition, there are more than 40 related companies in blockchain solutions, underlying platforms, blockchain media and community fields.

　　Judging from the distribution of financing rounds, the blockchain industry is still in a very early stage. At present, nearly 90% of investment events are concentrated in the early stage (A round and before), another 9% are strategic investments, and the investment events in B round and after account for only 2%. The development of blockchain industry is in the ascendant.

　　The "White Paper" looks forward to the trend of China’s blockchain industry: First, blockchain has become the forefront of global technology development and opened up a new track for international competition; Second, the blockchain field has become a new hot spot for innovation and entrepreneurship, and technology integration will expand new application space; Third, the blockchain will be widely deployed in the real economy in the next three years and become an important support for the construction of digital China; Fourth, the blockchain creates a new platform economy and opens a new era of sharing economy; Fifth, the blockchain accelerates the process of "trusted digitalization" and drives finance to "get rid of virtual reality" to serve the real economy; Sixth, the blockchain supervision and standard system will be further improved, and the industrial development foundation will continue to be solid. (End)

　　According to the public data of the Ministry of Commerce, in April this year, the national building materials and home furnishing prosperity index (BHI) was 117.65, and the sales of building materials and home furnishing stores above designated size exceeded 110 billion yuan, and the cumulative sales from January to April exceeded 420 billion yuan.

　　Although the above data decreased slightly compared with the same period of last year, with the introduction of "trade-in" policies in various places since April, and the favorable factors such as the overlapping market entering the traditional peak season, the household sector continued to release consumption vitality, the industry prosperity rebounded, and the "Xiaoyangchun" market in the home building materials market also continued.

　　The market potential of "trade-in" is huge.

　　At present, China’s real estate market is still in the adjustment stage, but since the beginning of this year, favorable policies have been implemented in various places, and industry insiders expect that the industry will accelerate its stabilization. As the downstream industry of the real estate market, the consumer demand of the national building materials and home furnishing market continued to be released from January to April. Although the sales data decreased slightly year-on-year, thanks to the help of the policy side, the overall situation was still improving.

　　In March this year, the State Council issued the Action Plan for Promoting Large-scale Equipment Renewal and Trade-in of Consumer Goods (hereinafter referred to as the Plan) to promote economic transformation and upgrading and improve the quality of life of urban and rural residents.

　　The "Proposal" pointed out that for the trade-in of household appliances, it is necessary to improve the convenience as the core and smooth the consumption chain of household appliances; In order to promote the replacement of home improvement consumer goods, it is required to support residents to carry out local renovation of old houses, kitchens and bathrooms, continue to promote the aging renovation of homes, and actively cultivate new consumption such as smart homes. Promote home improvement model rooms to enter shopping malls, communities and platforms, encourage enterprises to build online model rooms, and provide affordable products and services to meet diversified consumer needs.

　　"The introduction of the trade-in policy is a major positive for the home furnishing industry." Qin Zhanxue, president of China Building Materials Circulation Association, pointed out that the relevant data of the Ministry of Housing and Urban-Rural Development showed that by the end of 2022, the total number of urban and rural housing construction in China had exceeded 600 million, with huge market potential. "As houses enter the aging cycle one after another, the demand for renovation and functional upgrading will gradually increase. It is expected that the industry will usher in a new round of trade-in climax in the future."

　　According to incomplete statistics, in the past year, the total output value of China’s home improvement industry was about 2.77 trillion yuan, of which the demand for local decoration exceeded 35%. "It is conservatively estimated that the replacement scale of the home and home improvement market will exceed one trillion yuan." Hu Yanan, secretary-general of China Building Decoration Association’s Residential Decoration and Parts Industry Branch, said that according to the association’s rough calculation, there are more than 200 million houses in urban housing that are over 20 years old, and the demand for renovation and transformation at the consumer end is strong.

　　Grasp the "renewal" cycle and accelerate the layout of enterprises

　　The promulgation of the "Program" has given industry support and guidance at the policy level and brought new development opportunities at the development level. Many home associations and head home stores have acted quickly, actively responding to the policy call and helping to release the potential of home consumption by issuing trade-in coupons, promoting in communities, and granting subsidies.

　　At the end of April, at the annual meeting of the housing industry in 2023-2024, the Residential Decoration and Parts Industry Branch of China Building Decoration Association, in conjunction with the head home improvement enterprises and parts and materials enterprises all over the country, officially launched the "Home Improvement Trade-in Action". "I hope that through this action, a group of’ home improvement practitioners’ will be cultivated, and typical cases of enterprises will be launched to create a more assured, worry-free and secure consumption environment." According to the relevant person in charge of China National Equipment Association, this action aims to promote the effective implementation of "trade-in" related programs in the home improvement and home furnishing industries, and call on the whole industry to respond to the replacement of home improvement consumer goods, and encourage member units to actively carry out local upgrading and renovation of old houses, kitchens and bathrooms, and aging renovation of homes.

　　On May 6th, in response to the "Consumption Promotion Year" policy of the Ministry of Commerce, and vigorously promoting the trade-in of the household industry, China Building Materials Circulation Association also launched the "Third National Green Smart Home Consumption Festival", which empowered enterprises by implementing the relevant action plan of "trade-in" and issuing exchange vouchers for trade-in.

　　Focus on home stores. According to our understanding, the heads including Red Star Macalline and Easyhome made relevant implementation plans as early as the "trade-in" scheme was put forward.

　　Among them, Beijing Red Star Macalline has invested more than 10 million yuan since March to promote trade-in, benefit consumers, and help people rejuvenate. It is reported that in order to make more consumers enjoy the trade-in benefits easily, Beijing Red Star Macalline not only joined hands with 17 brand enterprises such as Xilinmen, Wrigley Sanitary Ware and Boloni to participate in the trade-in activities of green smart consumer goods, but also distributed subsidies of about 8 million yuan in different forms through online and offline channels.

　　The relevant person in charge of Red Star Macalline said that consumers can make an appointment to drag the old service through the "Red Star Home" applet, and they can enjoy the 600 yuan subsidy at the highest; Go to the offline store for "replacement", and you can also enjoy the government subsidy and superimpose the joint discount. "At present, relevant subsidies have been launched in five major shopping malls in Beijing, and consumers can get subsidies and enjoy the benefits of renewal."

　　The data shows that since the beginning of this year, Red Star Macalline has launched a large-scale "trade-in" campaign for home appliances in many shopping malls across the country, taking the demand for trade-in as the contact point to obtain accurate store traffic for shopping malls, and guiding the related sales between home appliances and other categories through refined operation.

　　On May 9, Easyhome also revealed the progress of "trade-in" on the investor interaction platform. It said that this year, it will comprehensively promote the three major IPS of "trade-in furniture and household appliances", "old houses for new looks" and "it is difficult for families to find them", which will drive the rapid growth of home sales.

　　The relevant person in charge of Real Home pointed out that the company released the "trade-in" strategy as early as 2022 and carried out related business. "According to statistics, a number of IP activities related to’ trade-in’ achieved remarkable results last year, achieving 207,000 customers, guiding sales of 650 million yuan and recycling 68,000 old things." The person in charge said.

　　At the same time, many home furnishing enterprises also seize the favorable market cycle and fully exert their strength in the stock market.

　　At the beginning of May, Qumei Home officially launched this year’s trade-in activities in the "Huanxin Plan Conference". In fact, since the first launch of this activity in 2013, Qumei Home has positioned it as a long-term and far-reaching important action. Zhao Ruihai, chairman of Qumei Home Furnishing Co., has repeatedly said that "trade-in" is not only a commitment to consumers, but also a manifestation of corporate social responsibility.

　　"Among about 300,000 customers accumulated by enterprises, some of them are currently in the consumption cycle that needs to be updated and iterated." Recently, Meike Home also publicly stated that this year, it will increase visits to early users, carry out maintenance and clue acquisition, with a view to providing consumers with diversified replacement programs. Oupai Home has launched the whole house renovation and whole package services, such as package storage, package discount, package design and help to move, to meet the diversified needs of consumers.

　　The industry believes that promoting the trade-in of household products requires both upstream and downstream synergy, and the household industry needs to continuously and deeply tap its own resources to promote the sustainable development of trade-in in a more market-oriented way and more convenient activities.

　　Both ends of supply and demand still face corresponding difficulties.

　　Although the market potential of trade-in is huge, it faces many difficulties in practical operation.

　　From the consumer side, how to deal with the replaced furniture, where to store the old furniture, and how to find a "reliable" decoration company and foreman may all hinder the implementation of the old-for-new policy. On the supply side, trade-in, local renovation and other links have a large amount of work, relatively low customer list value, and most of them are concentrated in old communities, so the construction difficulty is relatively high.

　　"At present, the residual value of many furniture recycling and dismantling wastes is relatively low, and the willingness of large-scale platform enterprises to participate in recycling is insufficient, but consumers do not have the ability to handle large pieces of furniture by themselves, which will become a constraint for replacing new ones to some extent." Zhu Jiagui, CEO and general manager of Red Star Macalline Home Furnishing Group, said that it is not easy for most home furnishing enterprises to provide large-scale trade-in services and handle old furniture well. "It is necessary to pay higher operating costs in terms of management, operation, normative environmental protection and demolition." Zhu Jiagui said.

　　In view of the problem that "trade-in is easy to abandon the old", Qin Zhanxue believes that the focus of trade-in should be on the "new" and the treatment of the "old" should not be ignored. "Old products should not be treated as garbage, but should be reused." He said, for example, furniture products can be dismantled and recycled, while construction waste can be reprocessed into floor tiles for municipal decoration materials.

　　The relevant person in charge of the Consumer Promotion Department of the Ministry of Commerce said that the trade-in work involves thousands of households and the vital interests of consumers. Promoting the trade-in of consumer goods is not only a powerful measure to enhance the momentum of economic growth and consolidate the good momentum of recovery, but also a long-term strategy to promote the high-quality development of the home furnishing industry. In the future, the industry should gradually establish an effective mechanism of "it is easier to get rid of the old and more willing to replace the new", so that consumers can enjoy better services and the trade-in action can be truly and thoroughly carried out in the industry. Text/Zhang Xinyu

　　Source: Beijing Evening News

Special feature of 1905 film network From the extension of the Spring Festival to the re-release, just as the movie poster wrote, I pursued my "comeback against the wind" with the attitude of "not being optimistic".

It’s not easy to make sports movies, and it’s even harder to make them well.moreoverChina Ping PongWhat I want to tell is the story of China’s competitive sports "Ace Teacher" and the world table tennis overlord. Follow the characters to "cross" back to the moment of preparing for the World Table Tennis Championships 30 years ago, starringTimmy Xu、Duan Bowen、Cai Yida、guansen dingIn an exclusive interview with the 1905 film network, I admitted that, like most viewers, I couldn’t imagine where to start writing, which was enough to match the glory of China men’s table tennis.

Cai Yida, Timmy Xu, Duan Bowen, Ding Guansen (from left to right)

In the end, the "Five Tigers" met in the trough before the Jedi counterattack: failure, regret, injury and doubt … … Competitive sports has never been an overnight success. Why can China table tennis become the "strongest king"? They gave the answer with the 1995 World Table Tennis Championships.

Before becoming the "big devil"

The average age of the "Five Tigers" in "China Table Tennis Fight Back" was less than 30 years old when shooting, among which Dong Shuai was even "After 05". Compared with the training in ball skills, it is more important for them to find their own fulcrum close to the role from the real events and prototype characters of the year more quickly and accurately.

At that time, the Five Tigers were a special group of "representatives" of China men’s table tennis. They were not only the strongest players in the whole system, but also the hope and "undertaker" of China table tennis. The five men are different in age and style of play, each with its own characteristics, but the ultimate goal is only one: to help the men’s team play a "turnaround battle" in the shortest time before the World Table Tennis Championships.

It was the most difficult period of table tennis in China. On the one hand, compared with the fast-moving European rivals and the "old rivals" in Asia, our talents had a certain "broken file"; On the other hand, the targeted research on China in tactics by countries all over the world has also made our traditional dominant "first three boards" technology gradually lose its leading position.

The backwardness in concept, experience and training means has made China men’s table tennis fail many times. It was at this time that the "Five Tigers" were assembled by the new coaching staff from all echelons.

Duan Bowen, who plays Huang Zhao, is unanimously recognized as the most similar prototype in China Ping Pong. In order to achieve this effect, he needs to gain 30 pounds while doing a lot of exercise. However, being fat is more than just pursuing superficial "looking like". In the director’s view, this weight has become the "soul" of this role to some extent.

Duan Bowen revealed that Wang Tao played raw rubber backhand, and this time his practice in the film was mainly based on fast break of raw rubber backhand. Nowadays, this technology is not used much in the field, but Wang Tao fought against opponents from all over the world with backhand raw rubber. It is precisely because of "fat" that he has a strong enough core strength to support his own play, and the speed of backhand has become the main "killer" of Huang Zhao in the film.

The similarity between Duan Bowen and the prototype has been recognized by one of the "Five Tigers" and Ma Wenge, the technical director of China Table Tennis. Having really experienced the "lowest period" of China men’s table tennis, the former champion was particularly excited to see this story put on the big screen.

It is an unforgettable and valuable experience for Timmy Xu, who plays this character, to have a prototype directed by the crew at close range.

Before the film was released, his "face-changing" makeup was once on the hot search list, and "I can’t recognize Timmy Xu" became the feeling mentioned by the most viewers. Pull out eyebrows and apply black powder … … However, compared with making an issue of "face", Timmy Xu wants to be closer to the characters from the point of view.

"The change of appearance is only the most basic. The athletes at that time were actually in a different mood from the young people today. I was more (thinking) about feeling their spirit at that time. "

Seeing the "1995 World Table Tennis Championships" again on the set, Ma Wenge, as the technical director, felt that several actors really had the "Five Tigers" status and momentum, and he seemed to recall the feeling of winning every ball in that year. This is the most emotional game: there is excitement in front of the people in my hometown, tension in the face of the final "life and death", and pressure to fight a turnaround for many years.

However, for the actors who experienced this historical moment for the first time and the audience who saw the past behind the Wesling Cup through the lens for the first time, the "Jedi counterattack" presented in China Table Tennis has far exceeded the victory itself.

Looking at this "dream team" that dominates the world, we always have the confidence that "China table tennis will not lose". But at that time, it was more like an endless road and a group of "underdogs" in front of the "Five Tiger Generals". No one knows whether the result of hard work is to win or fail again, so before becoming the "big devil", be an invincible "Xiaoqiang".

It’s never "can’t lose", but it’s not afraid to lose or admit defeat. "If others have practiced for 1000 times, we will practice for 10,000 times", which is the China table tennis spirit that people are most proud of.

Today’s "Ma Long",is the answer of China table tennis for 30 years.

"How far are you from the world champion of the real national team?" During the filming of Ping Pong in China, Ding Guansen, who played the role of Liu Guoliang as the director of his youth in the film, chatted with the members of the second national team who assisted in the filming.

"In my heart, they are already one in a million," Ding Guansen recalled, "but he said,’ Guansen, I tell you, I play with Malone, and you play with Malone, and the result is the same. "Can only score by Malone’s mistakes.

When hearing this sentence, Ding Guansen admitted that he and several other teammates "stood up": "I really realized how cruel competitive sports are. And why can China table tennis be so powerful? Because there have been layers of people trying to go up. "

Ma Wenge, the technical director, including Ding Song and Kong Linghui in the "Five Tigers", once recognized the technical movements of several young people after watching them hit the ball: "The curve and speed of the ball are really real, and the playing posture can’t be exactly the same, but it’s not easy to achieve this level in a short time."

However, during the interview, several young actors "denied" their training achievements for more than 8 months in unison: Do you want to imitate any "killer" in front of the camera?

What I have learned in these months is just the fur in the fur.Through actual combat and training, they actually felt the "China table tennis" inside story, and they also had a completely different understanding of competitive sports and China sports "dream team".

"Director Deng Chao often says that this is not a story about success, but this film is about how to face failure." At the beginning of receiving the project invitation, Timmy Xu, like the vast majority of the audience, could not imagine where the glory of China table tennis should be most convincing.

The special "trough period" 30 years ago became the most suitable entrance.Every word is brilliant, but every word is brilliant: "Only this turnaround in 1995 laid a good foundation for the decades after (China table tennis)." Kong Linghui, who was still a "young player" in the team, said this after learning the story of China Ping-Pong.

Up to now, China has won the Wesling Cup 22 times. In the last 10 World Table Tennis Championships, the China table tennis men’s team has never let this honor fall by.

"Why is table tennis in China prosperous now? It is because so many predecessors were sweating and bleeding at that time, casting our last Great Wall. This history is worth being understood by more people (through this film), and they are the only ones who have table tennis in China now." Ding Guansen regrets.

Competitive sports has never been a smooth sailing "cool article". "When you choose to be an athlete, you choose the most difficult road."

"China Table Tennis" is a complete core of China sports "Dream Team" with its hard work on the field and cruelty outside the field. Now, the success of "Malone" is the most satisfactory answer to China’s ping-pong spirit.

Text/World Network Business Data Analyst Sun Jixia

　

Without consumers, transactions cannot be established. For businesses, data about consumers is very important. At one time, obtaining a consumer report required a long and thorough investigation. With the continuous development of e-commerce and the increasing magnitude of data, various data products serving businesses came into being, and the way to obtain consumer data became more convenient and the cost was lower.

Among them, Alipay data is the largest gold mine in all data. First of all, Alipay data is based on real consumption data, or data generated from each real transaction, which is more reliable than other consumer research data; Secondly, Alipay data not only includes Taobao, but also has a broader user base, which can be said to include all aspects of e-commerce in all fields, and its rich data is unparalleled by any other company.

Therefore, "Tianxia Online Merchant Manager" and Tianxia Online Merchant Data Center jointly launched Alipay Data Compass, starting with the data of merchants outside Taobao, and brought a real online shopping data report of consumers outside Taobao for readers.

In particular, these data samples come from e-commerce websites supported by Alipay in 2012, except Taobao, which has extremely high reference value.

　

Demographic characteristics of online shopping consumers

1. Age distribution of online shopping consumers: Young people are the main force of online shopping.

Amoy e-commerce website accounts for more than 60% of online shopping consumers under the age of 30, and about 10% of online shopping consumers over the age of 40. It can be seen that online shopping consumers are generally young at present.

2. Geographical distribution of online shopping consumers: Online shopping is popular in third-and fourth-tier cities.

At present, consumers of e-commerce websites are mainly distributed in first-and second-tier cities, accounting for 67.9%. According to Alipay’s annual statement, in 2012, the number of online payment users in fourth-tier cities increased by 64%, and the amount of online payment increased by 68%, both exceeding those in first-and second-tier cities. Online shopping has gradually spread from developed areas to less developed areas, and the development speed of small cities can not be underestimated.

The province with the largest number of consumers on e-commerce websites is Guangdong, and Shanghai, Jiangsu, Zhejiang and Beijing also enter the top five. According to CNNIC data, the absolute number of Internet users in Shanghai ranked 13th in China in 2012. Based on Alipay data, it can be seen that the online shopping penetration rate in Shanghai is very high. The distribution of online shopping consumers in the top five provinces accounts for more than 50%, and the top ten provinces account for about 70%, which shows that the regional concentration of online shopping consumers is high.

　

Behavioral characteristics of online shopping consumers

1. Distribution of shopping network age: More than 40% of consumers have been shopping online for less than 2 years.

More than 40% of consumers on the website of Amoy E-commerce are online shopping for less than 2 years, among which the proportion of new consumers in 2012, that is, the proportion of consumers with online shopping for less than 1 year reached 23.4%, with more new consumers.

2. Frequency of purchase: Most consumers only shop online once a month.

70% of e-commerce website consumers only shop online once a month, and the proportion of consumers who shop online more than three times a month is less than 15%. For e-commerce, increasing the online shopping activity of consumers is an important issue.

3. Time distribution of online shopping: Consumers are more enthusiastic about online shopping on weekdays.

Consumers are more enthusiastic about online shopping on weekdays, and the number of online shopping consumers on weekends is significantly reduced. Because consumers can arrange their own time more freely on weekends or holidays, the shopping scene may shift to offline, while on weekdays, consumers do not have a lot of time to go out shopping, so they are more inclined to choose convenient and fast online shopping.

The online shopping time of consumers is consistent with the work schedule, and the shopping time is mainly concentrated in the daytime working hours and the evening at home. Among them, the shopping enthusiasm during the daytime working hours will be higher than that after work at home at night, and the shopping enthusiasm will drop slightly during commuting and eating time. Merchants can adjust their tactics according to the time distribution of online shopping to better meet the online shopping needs of consumers.

4. Customer unit price distribution: More than 70% of consumers’ online shopping customers have a unit price below 200 yuan.

The proportion of consumers whose unit price of e-commerce websites is above 1000 yuan is 9%, but more than 70% of consumers’ unit price of online shopping is below 200 yuan. It can be seen that most consumers tend to buy cheap items in online shopping at present.

5. Shopping preference: Clothing and accessories are everyone’s favorites.

Regardless of men and women, the top two categories that consumers love to buy are clothing and accessories. Household items are the third favorite category for women and the fifth for men, which shows that women love to buy household items more than men. 3C digital products are the fifth favorite category for women and the fourth for men, which shows that men love to buy digital products more than women.

The top two shopping preferences of all ages are clothing and accessories, but the top five shopping preferences will change with the growth of consumers’ age. For example, household items are the fifth category that consumers under the age of 24 prefer to buy, and from the age of 25, household items have risen to the third place; For consumers aged 30-39, maternal and child products have entered the top five, which reflects that most people in online shopping choose to marry late and have children late. Consumers aged 40-49 pay more attention to sports categories, and sports enter the top five shopping preferences in this age group. Consumers over the age of 60 are keen to buy food online, and food ranks among the top five in their shopping preferences. Online food provides convenience for the elderly who are not convenient for young people to move.

via： i.wshang.com

emergency food（emergence food，EF）It refers to a kind of food used to maintain human survival in emergencies such as disasters, wars and crashes. Common emergency foods mainly include earthquake relief emergency foods, military emergency foods, civil emergency foods and M9 outdoor emergency foods. Due to the late start of research and development,There is still a certain gap between China’s emergency food and developed countries such as the United States and Japan in processing and packaging, nutritional characteristics, food safety and other key technologies.

At present, the problems caused by the insufficient development of emergency food have initially appeared. First of all, during or after natural disasters, food in disaster areas and other affected areas may be contaminated by microorganisms and chemicals, and some food-borne diseases, including hepatitis A, typhoid fever and a series of intestinal diseases, such as cholera and dysentery, are prone to break out, thus affecting the health of victims and the effect of disaster relief.

Secondly, due to the imperfect design of emergency food formula,Its nutritional structure is difficult to meet the nutritional supply needs of specific people.It is difficult to predict the time and place of some emergencies, which also leads to the traditional supply chain processing equipment and storage and transportation system can not meet the stable supply and accurate distribution of emergency food, which makes the rescue efficiency decline.

This paper summarizes the types and characteristics of emergency food, the development status of product development, storage and transportation, processing and packaging technology, and looks forward to the research and development strategy, processing, storage and transportation strategy and food safety of emergency food in order to provide new ideas for the development of emergency food industry in China.

Types and characteristics of emergency food

With the frequent occurrence of emergencies around the world, the demand for emergency food is increasing. In order to better meet the nutritional needs of different rescue scenes and people, and combined with the laws of emergency food diversity, high energy density, storability and convenience for eating, a variety of common emergency food types have appeared in recent years, including canned food, compressed dry food, instant hot food, dehydrated food, etc. The advantages and disadvantages of different types of emergency food are shown in Table 1.

Table 1 Advantages and disadvantages of different types of emergency food

Emergency food has the following characteristics:

(1) Long shelf life: Emergency foods usually have a long shelf life to ensure edibility in emergency situations;

(2) Rich nutrition: under the premise of meeting basic energy, emergency food pays more attention to the functionality and special dietary effect of food according to the needs of the target rescue population;

(3) Portable: Emergency foods are usually packaged in light packages to quickly respond to emergencies;

(4) Food safety: Due to the harsh and changeable emergency rescue environment, the food safety of emergency food is very important.

When selecting emergency food types, it is necessary to make reasonable selection and planning according to disaster types, storage conditions, crowd demand and transportation environment. At the same time,Emergency food should be inspected and updated regularly to ensure food safety.

Development status of emergency food products

In recent years, China’s emergency food has developed steadily in terms of shelf life, taste, flavor and safety, but there is still a big gap compared with foreign countries. The shortcomings include:

(1) Low comprehensive performance. The diversity, nutrition and safety of emergency food need to be further strengthened;

（2）Functional development is limited.Due to the lack of practical experience in functional development and the lack of clear supervision and guidance standards, it is difficult for enterprises to carry out effective innovation and development;

（3）The production cost is high.The research and development of key technologies and formulas of emergency food are lagging behind and the added value is low, which leads to its lack of core competitiveness and affects production costs.

With the increasing market demand for serialized, functional, long shelf life and full nutrition emergency foods, continuous optimization, innovation and enrichment of R&D categories have become the key to the development of emergency foods.

With the development of science and technology,Emergency food is paying more and more attention to functions other than satiety and special dietary effects.Adding some ingredients or nutrients with special physiological functions to raw materials can enhance the overall functionality of emergency food.

At present, China’s self-developed "China 05 compressed food" has many functions, such as improving intestinal health, fighting hunger and promoting physical recovery, which greatly improves the efficiency of emergency rescue. Internationally, the United States has successfully developed military functional foods with different functions, such as anti-altitude sickness, anti-fatigue, refreshing the mind, quickly replenishing energy, improving intestinal function, etc. In order to meet the needs of different groups of people, modular foods with mineral modules, vitamin modules and energy modules have also been developed. Japan’s One Table Company has developed an emergency rescue jelly that is beneficial to swallowing, taking into account the people of all ages, so as to meet the needs of the elderly and children for quick nutrition supplement.

High-intensity rescue work in emergency rescue often makes rescuers in a state of physical and mental fatigue and overwork, which leads to inattention, weakened resistance and reduced work efficiency. Therefore,It is necessary to develop emergency food to delay or eliminate fatigue.

Hao Limin and others designed an anti-fatigue beverage formula, which was composed of oligosaccharides, taurine, caffeine, effervescent and other materials. It was processed into effervescent tablets by mixing, granulating, drying, cooling and tabletting. The animal test results showed that the beverage had obvious anti-fatigue effect. Wu Tianyi et al. conducted related research on anti-hypoxia functional fermented products. Through the screening of animal anti-hypoxia tests, it was found that natto and Schizophyllum commune fermented products from microorganisms had significant anti-hypoxia function, which provided a new design idea for the development of anti-hypoxia functional emergency food in the future.

Research status of emergency food storage, transportation and processing technology

In 2003, China began to pay attention to the research on emergency food storage and transportation, and compared with foreign countries, the research started late. In the "storage and transportation" system, food is generally classified and food quality standards are formulated to ensure food quality, facilitate transportation and improve rescue efficiency.The key to the efficient operation of the storage and transportation system lies in making full use of the electronic information platform.Ensure the coordination and mutual supervision of all links, strengthen the contact between emergency food storage and transportation and electronic information enterprises, so as to improve the rapid response ability of emergency food storage and transportation.

At present, there are many researches on food supply chain at home and abroad, covering the supply chain research of various specific food categories, such as fruits, vegetables, grain, etc. However, the research on emergency food logistics is rarely reported. The problems existing in the existing emergency food storage and transportation system in China are mainly summarized as the following four points:

(1) The layout of emergency material reserve centers around the country is unreasonable;

(2) Due to the asymmetric information flow and the large number of relief materials transfer stations in emergencies, the supply imbalance is prone to occur;

(3) Lack of procurement and operation standards for emergency food storage and transportation;

(4) The improvement of food safety evaluation system in the process of emergency food storage and transportation is not perfect, and the efficiency needs to be improved.

Compared with emergency food in developed countries,Domestic emergency foods generally have the problems of short shelf life and low scientific and technological content.The shelf life of self-heated rice and freeze-dried meat products introduced by American Mountain House Company can reach 30 years. The emergency food supply package launched by Wise Company is not only convenient and fast, but also can meet the needs of families, and its shelf life is as high as 25 years. In contrast, the shelf life of emergency food made of domestic Changwo special food by freeze-drying technology is not half as long as it is.

This shows that in the future, the development of emergency food in China should be oriented towards using emerging technologies to maintain the shelf life of food, thus developing a sustainable food value chain and limiting food waste. In order to prolong the shelf life, optimize the taste and promote nutrient absorption,More and more emerging processing technologies have potential application value.

1. Vacuum freeze-drying technology

Vacuum freeze-drying is to freeze the material below the eutectic point and remove the water in the material by sublimation in vacuum environment, so as to achieve the purpose of freeze-drying.It is common in military emergency food, which is used to improve the retention rate of nutrients and maintain the original color and flavor.Vacuum freeze-dried food can be stored at room temperature for a long time without adding preservatives because of its low water activity, and it is convenient to carry and transport.

Yang et al. used hot air drying, hot air vacuum combined drying and vacuum freeze-drying to dry the velvet antler mushroom. The results showed that vacuum freeze-drying could better keep the color and shape of velvet antler mushroom. However, vacuum freeze-drying has the disadvantages of time-consuming, energy-consuming and high cost when used alone, and these problems can be effectively solved by combining with other drying technologies.

Jiang et al. evaluated that freeze-drying combined with microwave vacuum drying was used to dry functional okra snacks. Compared with freeze-dried samples, the combined drying samples had better hardness and brittleness, and the drying time and energy consumption were reduced by about 75.36% and 71.92% respectively. Therefore,Vacuum freezing combined with vacuum microwave drying can be one of the development directions of emergency food drying.

2. Ultra-high pressure technology

Emergency food needs to have a long shelf life to ensure the safety and edibility of food in an emergency. Ultra-high pressure technology uses high pressure force to act on food,Without using high temperature or chemical additives, the shelf life of food can be prolonged by killing microorganisms and inhibiting enzyme activity, while maintaining the original flavor, color and nutrition of food.

Compared with traditional high-temperature treatment, ultra-high pressure technology hardly reacts with covalent bonds of small molecules, and only destroys non-covalent bonds that form the three-dimensional structure of macromolecules, such as hydration, ionic bonds and hydrogen bonds. By inactivating or activating biomolecules such as polysaccharide and protein in food, the product quality can be improved. It is found that soaking and ultra-high pressure pretreatment can increase the content of fast digestible starch and slow digestible starch in rice starch, and reduce the content of resistant starch, thus improving the digestion characteristics of rice.

It should be noted that ultra-high pressure sterilization technology is not suitable for all types of food, and the composition and structure of different foods have different sensitivity to pressure, so it should be tested according to specific products to determine the best treatment scheme.

3. Ultra-fine grinding technology

Ultra-fine pulverization technology pulverizes material particles to micron level by mechanical or hydrodynamic force, thus reducing particle size, changing composition and internal structure, and improving physical and chemical properties of materials. For example, ultrafine grinding canIncrease the solubility of foodSo that it can be easily dissolved with water or other liquids in a short time and quickly prepared into food; In addition, it can alsoEnhance the digestibility of foodSo that it can be absorbed and utilized by the human body in a short time and provide energy quickly, and reduce the burden on the gastrointestinal tract.

Sun et al. treated dehydrated celery stems with superfine grinding technology, and found that there was no significant difference in chemical composition of celery powder with different particle sizes. However, with the decrease of particle size of celery stem powder, its ability of scavenging free radicals was continuously enhanced, which provided a reference for developing fast-dissolving antioxidant functional foods. Zhang et al. treated oat bran by ultra-fine pulverization technology, which improved the surface properties, water holding capacity and swelling capacity of oat bran. The prepared oat bran powder has good physical and chemical properties and oxidation resistance. The data obtained from this study provide theoretical basis for the application of ultra-fine pulverization technology in emergency food deep processing and functional food development.

4. Microcapsule technology

Microcapsule technology is a new packaging technology, which forms a delicate and tough shell around liquid or solid core materials, so that the core materials can be packaged inside the shell. Nutrient fortification is a common technology to improve the nutrition of emergency food. However, many nutrients or functional components such as vitamins, probiotics and antioxidants are prone to degradation, oxidation and volatile loss during production, storage and transportation due to their unstable physical and chemical properties.Using microcapsule technology to embed nutrients and functional components can play a protective role, reduce the influence of external environment such as light, heat and oxygen, and at the same time make them be digested and absorbed when needed.Improve the nutritional value of emergency food.

The results show that adding microencapsulated nutritional fortifier ferrous sulfate to flour can mask the iron smell and avoid the rancidity of oil caused by direct addition. Das et al. successfully prepared anthocyanin extract from purple rice bran with modified glutinous rice starch as wall material by spray drying technology. Microencapsulation showed that the surface of microcapsules was more uniform and smooth than natural starch and modified starch, and the storage stability of microencapsulated anthocyanins was improved. Generally speaking, microcapsule technology provides a new possibility for emergency food, which can improve the taste and prolong the storage time while ensuring nutrition and convenience.

5. Nanotechnology

Nanotechnology can be used to enhance the nutritional value of food and improve its functional components. For example, processing nutrients to less than 100nm by nanotechnology can improve the absorption and utilization rate of nutrients by human body, which can solve the pain point problem that emergency food has low moisture content and is not easily absorbed and utilized by human body.

Nanotechnology can also improve the texture, taste and flavor of food, and be used to remove harmful pollutants in food, such as pesticide residues, heavy metals and harmful chemicals. The special properties of nano-materials enable them to adsorb or catalyze the degradation of these pollutants and improve food safety. However, the application of nanotechnology in food processing is still in its infancy. In the future, when nanotechnology is applied to emergency food, it is necessary to carry out risk assessment and strict supervision on the safety of nanomaterials to ensure the sustainable development of nanotechnology and food safety.

Research status of emergency food packaging technology

Food packaging is a very important processing link that affects the quality of emergency food. As a barrier layer of food, it can protect food from adverse factors such as external environment, microorganisms and pollutants, maintain food freshness, hygiene and safety, and extend its shelf life.Emergency food is usually stored by sealing, modified atmosphere and vacuum packaging. The packaging forms include vacuum aluminum foil packaging, composite nanotechnology packaging and edible film packaging.

In 2016, China developed the world’s first compressed packaging of disaster relief emergency food. By using this pre-foldable compressed packaging food, each logistics vehicle can carry 50% more goods, and the transportation and supply of disaster relief food is more efficient and faster, and the transportation cost is lower. In recent years, in order to prolong the shelf life of food and ensure the quality and safety of food, a variety of functional food packages have appeared in the market, such as antibacterial packaging that inhibits the growth of microorganisms, intelligent packaging that monitors the quality of food, and biodegradable environmental protection packaging.

1. active packaging technology

Active packaging is defined as an intelligent system, which aims to extend the shelf life and improve the quality of food through the interaction between packaging materials and the internal environment of food, so as to meet consumers’ demand for fresh, stable and safe food. Active packaging mainly includes antioxidant packaging and antibacterial packaging. Among them, antioxidant packaging can prevent food from deteriorating by absorbing oxygen or releasing carbon dioxide in the packaging, thus prolonging the shelf life of food. Common oxygen adsorbents include ethylene adsorbent, iron powder, activated carbon, biological enzyme and so on.

Antibacterial packaging mainly inhibits the growth of pathogenic and corrosive microorganisms in food by introducing antibacterial agents, prevents the migration of pollutants, and can also show the leakage of some packaging, thus ensuring food safety. These active packaging technologies provide a broader design idea for future emergency food packaging,So that it is no longer limited to dehydration and drying, and fresh food with better experience can be selected.

2. Nano packaging technology

Nano-technology involves the development of single or multi-dimensional materials less than 100nm. Studies have confirmed that packaging materials with nano-size have large specific surface area and small pores, which can effectively isolate the invasion of external gas, moisture and pollutants, prolong the shelf life of food and reduce the loss of food. In addition, the nano-packaging material has excellent mechanical properties,Can give packaging materials high mechanical strength and durability, and is suitable for use in harsh emergency environments.Therefore, nano-materials are expected to improve the mechanical and barrier properties of emergency food packaging.

On the other hand, the surface of nano-materialsAntibacterial agents such as nano silver can also be added to inhibit microbial growth and reduce food pollution and corruption.Thereby improving the safety of food. Compared with ordinary antibacterial packaging, nano-packaging has stronger anti-corrosion and fresh-keeping function, and is less affected by various extreme weather. In the future, with the continuous development of nanotechnology, nano-packaging materials are expected to provide better protection and quality control for emergency food, and ensure that people can get high-quality food supplies in emergencies.

3. RFID packaging technology（RFID）

RFID is a technology to automatically identify objects by using radio waves. Identification is accomplished by storing serial numbers or other information on a microchip connected to an antenna. Based on wireless communication, RFID can provide real-time information about temperature, relative humidity, nutrition and supplier information in the process of products passing through the supply chain, improve traceability and ensure food quality and safety.

The application of RFID in the field of military food packaging mainly focuses on the storage and transportation stage. By adding RFID tags to military food packaging, the whole process information tracking of military food in the distribution process can be realized through the one-object-one-code identification function of tag chip. In case of emergency, the whole distribution process needs no unpacking, and all the information of the product can be obtained directly by scanning the reader, including the processing information, storage status, transportation information and eating methods of the product, so as to realize the rapid and accurate replenishment of emergency food and improve the speed and accuracy of distribution.

At present, RFID technology has been widely used in the field of civil food packaging, and these experiences can be used for reference in the field of emergency food packaging.Realize the whole process tracking and management of emergency food supply chain, and improve the efficiency and quality of emergency food distribution.

4. Time-temperature indicator technology（TTI）

TTI technology aims to monitor the temperature changes in the food supply chain to predict the changes of food heat-sensitive nutrients and indicate the remaining shelf information of products, thus reducing food consumption and ensuring food safety. The basic working principle of TTI technology is based on the changes of machinery, chemistry, electrochemistry, enzymes or microorganisms, which are usually manifested as visible reactions in the form of mechanical deformation, color development or color movement. It can monitor and record some key parameters in the whole food distribution process,By combining the cumulative effect of time and temperature, the remaining shelf life of the product is dynamically displayed.In order to monitor the cumulative effects of time and temperature on specific products, TTI labels are usually attached to food packaging.

Compared with other temperature monitoring equipment, TTI is small in size and cost-effective, and can reflect the time and temperature changes experienced by food by displaying irreversible effects that are easy to observe. At present, the packaging method of emergency food usually follows the date of production, and the date of production and the time limit for eating are printed on the outer packaging. However, in an emergency situation, the quality and safety of food become particularly important due to the instability of storage and transportation environment. By using TTI technology, the quality and safety of emergency food can be better monitored and controlled, and whether the food has been infringed by the external environment can be found in time, which provides great guarantee for enhancing the safety of emergency food.

5. Edible packaging membrane technology

Edible packaging film refers to the packaging film with porous network structure formed by intermolecular interaction with edible materials such as protein, grain matrix, cellulose and other raw materials, supplemented by edible crosslinking agents, plasticizers and other substances.This packaging material can not only effectively protect food quality, but also reduce environmental pollution.

For example, the grain matrix film is usually made of soybeans, which is safe and harmless. At the same time, the packaged products also have the effect of moisture-proof and moisture-proof, which has a good effect on improving the quality of fresh-keeping foods. Compared with traditional packaging materials, edible packaging film has the characteristics of edibility, and it will not produce packaging waste after use, reducing the negative impact on the environment, making edible packaging film a more environmentally friendly choice.

Edible packaging film has a potential application prospect in the field of emergency food, which can provide good food protection and preservation effects, while reducing the generation of packaging waste. However, when edible packaging technology is applied to emergency food in the future,It is necessary to evaluate the stability and performance of this technology under various environmental conditions.

6. Biodegradable packaging technology

With the continuous development of new technologies and new resources, it is another research direction with great potential to use degradable, energy-saving and emission-reducing packaging materials instead of high-energy and refractory packaging materials. At present, researchers have done a lot of research on degradable packaging materials, and their barrier properties need to be improved when they are used in emergency food in the future.Designed as a biodegradable high barrier material.

Microfiberized cellulose material（microfibrillated cellulose，MFC）It is a biodegradable and widely used high-performance material, which usually comes from green beet pulp, bagasse and soybean skin, and is composed of a large number of cellulose microfibril aggregates. Lavoine et al. reported that microfibrillated cellulose materials and plastic film materials can be combined to form nano-composite packaging materials. Through surface chemical modification, the shortcomings of MFC materials in barrier performance and oxygen barrier performance were solved. However, due to the hydrophilic characteristics of bio-base, the moisture resistance of MFC nanocomposites needs to be further studied and improved.

In the future, intelligent packaging technology can be adopted to optimize the packaging barrier performance and design biodegradable multiple high barrier materials.

Prospect of emergency food development strategy

With the frequent occurrence of natural disasters and the increase of emergency situations, the complexity of rescue site environment and the diversification of rescue people, the development of emergency food in the future needs to introduce advanced scientific and technological innovation technology. For example, the use of Internet of Things technology, intelligent warehousing, scientific packaging technology, etc., to achieve traceability and monitoring of emergency food, improve the quality of emergency food and rescue efficiency. In addition, through the dimensions of raw material screening, formula design, texture reorganization, packaging design, etc., emergency foods in different scenes and target groups are developed to accurately match the nutritional needs of specific groups, increase their acceptance and satisfaction in emergency situations, and improve the quality and effect of emergency response.

1. Future research and development strategy of emergency food

Future emergency food is a kind of food that can quickly and accurately match the nutritional needs of specific people according to different emergency situations, and is convenient for transportation and storage. Based on the research results of emergency food in various countries, the future research and development strategy of emergency food in China can be carried out from three aspects: serialized emergency food, functional emergency food and high-tech application of science and technology.

1) Serialized emergency food.The serial development of emergency food is mainly adjusted and customized according to the dietary needs of different disaster environments and different people, which means developing diversified emergency food products.Including vegetarian, gluten-free, lactose intolerance and other products with special dietary needs to meet the needs of different groups of people.

To carry out the research strategy of emergency food serialization, especially for the needs of special groups such as the elderly, children and pregnant women, the following measures can be taken:

① Reasonable formula design, and develop emergency formula according to the nutritional needs and health status of special groups. For example, for the elderly and pregnant women, attention should be paid to the intake of protein, vitamins, minerals and cellulose; For children, energy requirements and digestibility need to be considered.

② Selection and treatment of ingredients. In order to meet the nutritional needs of the elderly and pregnant women, you can choose ingredients that are easy to chew and rich in protein and fiber; For children, you can choose ingredients that suit their taste and digestive system.

③ Safety and non-allergic guarantee. For pregnant women, children, the elderly and other special groups, it is necessary to ensure that food does not contain substances that may cause allergic reactions, such as peanuts, nuts, alcohol and so on.

④ Product form and packaging design. For the convenience of the elderly and children, it can be designed to be easy to open, chew and digest, and adopt easy-to-operate packaging methods, such as vacuum packaging and canned food.

2) Functional emergency food.The development of functional emergency food will pay attention to the nutritional balance of emergency food and the addition of functional ingredients, so as to meet people’s special needs in emergencies and slow down and eliminate the adverse effects of emergency conditions on human physiology or psychology. exploitationAnti-fatigue, anti-hyperreflexia, anti-anxiety, low temperature tolerance, help sleep, improve constipation and improve immunity.Functional emergency food is the focus of research and development of emergency food at present.

When natural disasters occur, they are often accompanied by water pollution, which will lead to serious gastrointestinal diseases and various infections. Studies have confirmed that bioactive substances can be used to treat some diseases, improve the function of biological systems or resist pathogens. For example, intake of polyunsaturated fatty acids can alleviate intestinal inflammation by changing intestinal flora and enhancing intestinal cell barrier function; Polyphenols such as curcumin can reduce the stress of endoplasmic reticulum, thus reducing the inflammatory response of human intestinal epithelial cells.

Previous studies have shown that intestinal inflammation can be improved not only by drugs, but also by improving dietary intake and increasing the intake of polyunsaturated fatty acids, dietary calcium and vitamin D, thus improving intestinal health.

For example, increasing the dietary fiber content in emergency food can promote intestinal peristalsis and defecation, and prevent constipation and gastrointestinal problems; Adding probiotics or fermented food can improve the balance of intestinal flora, enhance the function of immune system and reduce the risk of gastrointestinal infection; Foods rich in vitamin C and antioxidants, such as citrus fruits and vegetables, help to enhance the immune system function, improve the body’s resistance and reduce the risk of infection.

All in all,By improving the nutritional composition of emergency food, we can alleviate the intestinal problems caused by disasters and help people stay healthy in difficulties.The above measures can help to improve the health effect of emergency food on intestine, but in practical application, the preservation and storage conditions of food need to be considered to ensure the safety and nutritional value of food.

3) The application of scientific and high technology.The introduction of high technology is of great significance to the breakthrough of emergency food in shelf life, nutrition and functionality. In terms of extending the shelf life, methods such as microbial control, vacuum packaging and irradiation sterilization can be adopted. In terms of improving nutrition, nutritional enhancers or functional ingredients can be added to emergency food to enhance its nutritional value.

In terms of improving functionality, high-tech can be used to develop emergency food with specific functions, for example, adding natural antioxidants, humectants, thickeners, etc. to increase the antioxidant capacity, water retention and taste of food. In addition, the use of nanotechnology can improve the texture and taste of food. In the aspect of personalized nutrition enhancement, it can be combined with wearable equipment and sensors. According to the results of physiological testing,(such as lack of potassium or vitamin A)Form personalized demand data, send it to the processing base, and generate special nutritious fortified food made of seasoning liquid and powder through additive manufacturing.

To sum up, serialized emergency foods can meet the dietary needs of different groups of people, while functional foods pay attention to nutrition and special needs, while the application of science and technology and high technology is helpful to improve the quality stability, nutrition promotion and functional supplement of emergency foods. These strategies will promote the further development of emergency food in China in the future and ensure that people can get a safe and balanced food supply in disasters.

2. Emergency food processing storage and transportation strategy

Emergency food is an important relief material for survival under emergency conditions, which requires extremely high production environment and product quality in the supply chain.Therefore, it is necessary to establish an automatic, flexible and digital intelligent supply chain system.The following measures can be taken in the production of emergency food in the future.

1) Introduce intelligent equipment.Through intelligent sorting and cascade utilization technology of raw materials, artificial intelligence combined with deep learning of photoelectric equipment, inductive classification combined with manual assistance, the process parameters in the production process are continuously optimized, and a demand-oriented raw material supply system is established, which can realize the automation of raw material pretreatment and processing, reduce the risk of human subjective errors and cross-contamination, and achieve the effect of improving quality and reducing cost.

2) Build a flexible supply chain.Based on the production requirements of serialization, functionalization and science and technology of emergency food in the future, flexible supply chain can help enterprises optimize resource allocation and utilization, thus reducing costs. For example, according to the production demand of emergency products, enterprises promote the digital transformation of production processes to ensure product quality, efficiency and sustainable production capacity; In addition, through flexible adaptation of intelligent filling and packaging technology, we can quickly switch and adjust product specifications and packaging methods, so that enterprises can quickly respond to changes in market demand and improve emergency rescue efficiency.

3) Establish a digital monitoring system.By introducing precise temperature control technology and RFID technology, the key parameters of the process, such as temperature, humidity, flow rate and speed, can be collected in real time by sensors and monitoring equipment, so that the abnormal situation can be adjusted in time to ensure that the products meet the standard requirements. At the same time, considering that the time and place of emergencies are difficult to predict, the joint application of the Internet of Things and smart packaging technology can track the location, transportation conditions and quality of emergency food in real time, and combine with the logistics management system to carry out intelligent distribution and route optimization in real time according to the changes of disaster situation, so as to achieve the best transportation efficiency and save costs.

Different from ordinary food, the demand for emergency food will be affected by various factors.In the future, the development of emergency food should adopt modular design, that is, food should be grouped and packaged according to function or proportion, so that people can choose and combine different types of food according to their needs.And ensure the balanced nutrition of food. Modular design of emergency food has the advantages of flexible selection, balanced nutrition, easy carrying and storage, and improved emergency response flexibility, which can play an important role in future emergency rescue.

3. The prospect of emergency food safety.

There are some harmful substances such as mycotoxins, heavy metals and allergens in the production, processing and transportation of emergency food.It is of great practical significance to establish an emergency food quality management system, analyze the potential hazards in the production process and continuously monitor them.

In recent years, the rapid nondestructive detection technology of food and food raw material hazards has been widely used in the field of food detection and sorting, such as multi-spectral imaging technology, hyperspectral imaging technology, terahertz spectral imaging technology and so on. Because it is simple, rapid and nondestructive, and can obtain the image and spectral information of the detected substance at the same time, it has potential application prospects in food quality and safety detection, mainly including variety identification, adulteration analysis, quality and hazard detection and a series of applications.

Shi et al. realized the rapid nondestructive detection of Fusarium graminearum and vomitoxin in wheat by multi-spectral imaging technology, and explored a new method for monitoring mycotoxin pollution in wheat production, processing and storage. Liu et al. can monitor zearalenone in corn quickly and non-destructively through multi-spectral imaging combined with machine learning technology.（ZEN）The content of mycotoxin is of great significance to the monitoring of mycotoxin pollution during corn storage and transportation.

Du et al. realized the rapid detection of Staphylococcus aureus enterotoxin B in milk by Raman spectroscopy and stoichiometry, which ensured the safety of milk. Liu et al. quickly determined the concentrations of aflatoxin B1 and benzopyrene in soybean oil by terahertz spectroscopy combined with chemometrics, which provided an effective means for food safety monitoring.

In addition, harmful substances, microbial contamination and chemical residues in food processing seriously affect the quality and safety of food. Therefore, through the rapid detection technology of food hazards in the processing process, it can help manufacturers to respond quickly and reduce or avoid unqualified production operations.

Traditional on-line detection technology often has some shortcomings, such as requiring large equipment and professional operators, and complicated pretreatment.Electrochemical detection methodIt has the advantages of high sensitivity, quick response, real-time monitoring and selectivity. By measuring and analyzing electrochemical signals such as current and voltage in food raw materials, it can be judged whether there are harmful substances.

Gao et al., from the perspective of electrochemical detection, used the electrolyte gate-controlled graphene transistor with two-dimensional graphene as the channel material to realize the rapid identification of the freezing and thawing degree of beef. Mao et al. aim at heavy metal Cr in aquatic products（VI）In order to solve the pollution problem, two-dimensional monatomic iron material is used as the colorimetric sensor of peroxidase to detect Cr in fish quickly and simply.（VI）, and achieved good expected results. Zhu et al. developed a portable aptamer sensor, which has the characteristics of simple operation and portability, and can simultaneously detect T-2 toxin and zearalenone in corn and oat flour, thus realizing the on-line detection of mycotoxins during processing.

In the future, multi-functional electrochemical biosensors and nano-devices can be constructed through electrochemical aptamer joint detection technology, so as to realize the detection of complex hazards such as benzopyrene and allergens in the production process and ensure the safety and stability of food quality in the production process. The flow chart of future emergency food research and development strategy is shown in Figure 1.

Figure 1 Future Emergency Food R&D and Development Strategy Process

conclusion

In recent years, emergencies have occurred frequently in China, and the demand for emergency food has been rising continuously. Especially after the COVID-19 epidemic, China residents’ awareness of food nutrition and safety has been continuously enhanced, and food is required to have certain functionality while meeting basic energy. Therefore, one of the first tasks in the post-epidemic period is to accelerate the research on emergency food.

For the development of emergency food in China, there are many problems in the process of modern rescue, such as insufficient nutrition supply of emergency food, imperfect functional food and difficulty in accurate distribution. Based on this actual situation, the design and development of rescue food with complete nutritional functions, convenient eating and convenient storage and transportation, and the realization of industrial production can not only meet the national emergency relief needs, but also fill the food shortage of emergency relief materials.

By analyzing the development gap of emergency food at home and abroad and thinking about the future development trend of food, this paper puts forward three research and development directions of emergency food, and produces a series of safe, fresh, nutritious and stable emergency food through intelligent supply chain and accurate and efficient detection technology, so as to make it have core competitiveness and greater development space in the market, and gradually open and improve the emergency food market in China.

Acknowledgement: Professor Hao Limin, Institute of Quartermaster Engineering Technology, Institute of Systems Engineering, Academy of Military Sciences, gave advice and help; Support of agricultural eco-environmental protection and quality and safety industrial technology system in Anhui Province.

This article comes from WeChat WeChat official account:Science and technology herald (id: streview), published in Science and Technology Herald, No.19, 2023, by Ning Cheng (Ph.D., School of Food and Biological Engineering, Hefei University of Technology), Liu Changhong and Zheng Lei (correspondent, same as before, professor).