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).

SAIC owns many automobile brands, including SAIC Volkswagen, SAIC-GM Buick, SAIC-GM Chevrolet, SAIC-GM Cadillac, SAIC Volkswagen Skoda, SAIC-GM Wuling, SAIC Roewe, SAIC MG, SAIC Chase, Nanjing Iveco, Shenwo Bus and SAIC Hongyan. The main business of SAIC covers the R&D, production and sales of complete vehicles (including passenger cars and commercial vehicles) and parts (including engines, gearboxes, power transmission, chassis, interior and exterior decorations, electronic appliances, etc.), automobile service trade business such as logistics, vehicle information, used cars, and automobile finance business. The main vehicle companies affiliated to SAIC include passenger car companies, commercial vehicle companies, Shanghai Volkswagen, Shanghai GM, SAIC-GM-Wuling, Nanjing Iveco, SAIC Iveco Hongyan, Shanghai Shenwo and so on.

SAIC Volkswagen is currently responsible for the production and sales of Volkswagen and Skoda, and its products cover A0, A, B, C, SUV, MPV and other market segments. Volkswagen brand models include Polo family, New Santana family, Lavida family, Lamando brand, New Passat brand new Passat, PHIDEON Huiang, Tiguan Silk Road version, All New Tiguan L brand new Tiguan L, Teramont Touran and Touran brand. Skoda brand models include Fabia Jing Rui, Rapid Xin Rui, Rapid Spaceback Xin Dong, Octavia Ming Rui, Superb Express, Yeti and KODIAQ.

SAIC General Motors Co., Ltd. is a joint venture between China SAIC and American General Motors Co., Ltd. It owns three brands, Buick, Chevrolet and Cadillac, and its product lineup includes more than 20 series, covering SUV, car, MPV, hybrid and pure electric vehicle. Among them, Volkswagen brand models include Polo family, New Santana family, Lavida family, Lamando, New Passat brand new Passat, PHIDEON Hui ‘ang, Tiguan Silk Road Edition, All New Tiguan L brand new Tiguan L, Teramont Touran and Touran, etc.

The business scope of SAIC is very extensive, including not only the R&D, production and sales of complete vehicles (including passenger cars and commercial vehicles) and parts (including engines, gearboxes, power transmission, chassis, interior and exterior decorations, electronic appliances, etc.), but also the automobile service trade business such as logistics, on-board information and used cars, as well as the automobile finance business. The main vehicle companies affiliated to SAIC include passenger car companies, commercial vehicle companies, Shanghai Volkswagen, Shanghai GM, SAIC-GM-Wuling, Nanjing Iveco, SAIC Iveco Hongyan, Shanghai Shenwo and so on.

According to the client news of Henan Daily, the epidemic prevention and control headquarters of Henan Province requires all localities to strictly implement the Administrative Measures for Epidemic Prevention and Control of Health Codes in COVID-19, Henan Province and the rules for assigning and transcoding health codes. Health codes are only used for epidemic prevention and control to serve people’s health, and are never allowed to be used outside the circumstances stipulated by the national and provincial epidemic prevention and control headquarters, and are never allowed to be used in scenes unrelated to epidemic prevention and control, and are never allowed to add or delete the database of health code risk personnel beyond the rules.

The provincial epidemic prevention and control headquarters once again asked all cities and counties to strengthen the management of health codes, and severely dealt with those who caused serious consequences due to improper use of health codes.

Editor Zhao Xi

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　　On Wednesday, Eastern Time, US chip stocks experienced a one-day rebound tour, which weakened in an all-round way overnight, and the market was also dragged down. The three major indexes were mixed. In addition, after the release of heavy inflation data, the market also lacked catalysts, and the overall performance was relatively dull.

　　At the close, the Dow Jones index rose 0.10% to 39,043.32 points; The S&P 500 index fell 0.19% to 5,165.31 points; The Nasdaq index fell 0.54% to 16,177.77 points.

　　The yield of US bonds has rebounded, with the benchmark 10-year US bond yield closing at 4.1879% and the 2-year US bond yield, which is most sensitive to the Fed’s policy interest rate, closing at 4.6324%.

　　It may take some time for the market to digest the inflation data, because the last interest rate meeting in the first quarter will be held next week. At this meeting, the bitmap and economic outlook will be announced, when investors will have a clearer expectation for the prospect of interest rate cuts. Before that, if there is no heavy news, US stocks may be more inclined to defensive trading strategies.

　　Some analysts said that although the latest CPI data is a relief, people are still cautious about the basic data. In the short term, the macro narrative around the Fed will be the primary and central issue.

　　Let’s pay attention to the progress of the US presidential election again. According to Xinhua News Agency, according to calculations and reports from many mainstream media in the United States, former President Trump locked in the Republican presidential nomination for the 2024 US presidential election on the 12 th. That is to say, if there is no accident, Biden and Trump will fight for the second time in the presidential election, but the market has not obviously responded to this at present, and the policies pursued by the two are worthy of attention.

　　In terms of enterprises and industries, it is not as dull as the broader market. Tesla, in particular, has been under the headwind so far this year, and was once again slashed by two investment banks overnight. UBS maintained Tesla’s neutral rating and lowered its target price from $250 to $165. Wells Fargo lowered Tesla’s target price from $200 to $120. Tesla fell more than 4% overnight to $169.5, and there was still 30% room for decline from Wells Fargo’s target price.

　　Colin Langan, an analyst at Wells Fargo, reported that the growth of the electric car manufacturer in the core market has slowed down. He downgraded Tesla’s rating to the equivalent of selling. It is expected that Tesla’s sales will be flat this year and will decline in 2025. Langan writes that Elon Musk’s company is a "growth company without growth". He pointed out that in the second half of 2023, sales only increased by 3% compared with the first half, while prices fell by 5%. Analysts have become more and more cautious about Tesla, and the bullish rating ratio has dropped to the lowest since April 2021.

　　In the future, see how Musk will fight back.

　　In terms of AI, Figure, a robot startup company blessed by Amazon and NVIDIA, has released its first robot demo blessed by OpenAI. Although only a neural network is used, it can be used to hand apples to humans, put black plastic bags into frames, and put cups and plates on the drain rack in order to obey human orders. The video shows that the whole operation of the robot is very smooth.

　　In addition, Cerebras Systems, a California semiconductor company, released the third-generation wafer-level AI acceleration chip "WSE-3", whose specifications and parameters are even crazier, and its performance has doubled under the premise of constant power consumption and price. It can train the next generation AI model which is ten times as large as GPT-4 and Gemini, and can store 24 trillion parameters in a single logical memory space without partition or reconstruction.

　　However, it should be noted that the EU passed the world’s first heavy artificial intelligence supervision bill, which is expected to take effect in May.

　　[Hot stocks]

　　Most large technology stocks fell, with Apple down 1.21%, Microsoft down 0.04%, NVIDIA down 1.12%, Google up 0.93%, Amazon up 0.66%, Meta down 0.84% and Tesla down 4.54%.

　　In terms of Chinese stocks, Nasdaq China Jinlong Index rose by 1.04%, Alibaba rose by 0.43%, JD.COM rose by 2.34%, Pinduoduo rose by 3.55%, Weilai Automobile fell by 4.36%, Xpeng Motors fell by 3.10%, LI fell by 3.30%, Blilly fell by 1.42%, Baidu rose by 2.49% and Netease rose by 1.94%.

　　[global index]

　　In European stock markets, the FTSE 100 index rose slightly by 0.31% to 7772 points. The French CAC40 index rose slightly by 0.62% to 8138 points. Germany DAX index fell slightly by 0.02% to 17,961 points.

　　In Asian stock markets, the Hang Seng Index fell slightly by 0.07% to 17,082 points. The index of state-owned enterprises fell slightly by 0.29% to 5932 points.

　　[foreign exchange commodities]

　　The main contract of Brent crude oil closed at $83.95 per barrel, up 2.48%; The main contract of crude oil in the previous period closed at 630.90 yuan per barrel overnight, up 1.64%.

　　Overnight, the Shanghai gold main contract closed up 0.76% to 508.84 yuan per gram.

　　[Highlights]

　　Yellen: US interest rates are unlikely to fall back to the pre-epidemic level. The slowdown in rent growth will push inflation down.

　　As to why the forecast released by the White House on Monday shows that the interest rate forecast in the next few years is significantly higher than that of a year ago, Yellen said that the relevant economic forecast of the White House reflects the current market reality, and she also refuted the concerns about stagflation, insisting that the progress in inflation has not stagnated.

　　Figure launches robot demo blessed by OpenAI big model.

　　Robot startup Figure released its first robot demo blessed by OpenAI big model. Although only a neural network is used, it can be used to hand apples to humans, put black plastic bags into frames, and put cups and plates on the drain rack in order to obey human orders. The video shows that the whole operation of the robot is very smooth.

　　The world’s first AI chip upgrades 4 trillion transistors and 900,000 cores.

　　Cerebras Systems, a California semiconductor company, released the third-generation wafer-level AI acceleration chip "WSE-3", with even crazier specifications and doubled performance under the premise of unchanged power consumption and price. WSE-3 was upgraded to TSMC’s 5nm process again, but the area was not mentioned, but it should be similar. However, the number of transistors continued to increase to an astonishing 4 trillion, the number of AI cores further increased to 900,000, the cache capacity reached 44GB, and the external matching memory capacity was 1.5TB, 12TB and 1200TB. The number of cores and cache capacity have not increased much, but the performance has achieved a leap. The peak AI computing power is as high as 125PFlops, which is 1.25 billion floating-point calculations per second, comparable to the top supercomputing. It can train the next generation AI model which is ten times as large as GPT-4 and Gemini, and can store 24 trillion parameters in a single logical memory space without partition or reconstruction. Four parallel, it can complete the adjustment of 70 billion parameters in one day, and support up to 2048 interconnections, and it can complete the training of Llama 700 billion parameters in one day.

　　UBS and Wells Fargo slash Tesla’s target price

　　On March 13th, local time, Tesla closed down 4.54% to $169.48, and its market value evaporated by about $257 overnight, with a total market value of $539.8 billion. UBS maintained Tesla’s neutral rating and lowered its target price from $250 to $165. Wells Fargo lowered Tesla’s target price from $200 to $120.

　　The European Parliament passed the Artificial Intelligence Act.

　　On March 13th, the European Parliament passed the landmark Artificial Intelligence Act with 523 votes in favor, 46 votes against and 49 abstentions. The European Parliament said that the bill aims to protect basic rights, democracy, the rule of law and environmental sustainability from the impact of high-risk artificial intelligence, while promoting innovation to "build Europe into a leader in this field". The bill will ban some artificial intelligence applications that "threaten citizens’ rights", including biometric classification systems based on sensitive features, as well as capturing facial images from the Internet or closed-circuit television videos to create a facial recognition database. Artificial intelligence that manipulates human behavior or exploits human weaknesses will also be banned.

　　Musk confirmed that Tesla’s German factory resumed operations.

　　Musk issued a document on March 13 that Tesla’s super factory in Berlin has resumed operations and thanked the employees for their support. It is reported that the Tesla German factory was blacked out for a week due to arson. The power company responsible for solving the power outage said later on Monday that the factory had been reconnected to the power grid. It is reported that the factory has about 12,500 employees.

　　It is reported that Samsung Electronics plans to increase the price by 15-20% with downstream manufacturers on the price negotiation of NAND flash memory.

　　Samsung Motor plans to renegotiate the price of NAND flash memory with major mobile, PC and server customers from this month to next month, with a target price increase of 15-20%. After more than a year of oversupply, the price of Samsung Electronics’ NAND flash memory was once flat, so it plans to negotiate with big customers to bring the price back to a reasonable level.

　　GPT-4.5 is suspected to be available. OpenAI official website webpage was indexed by netizens. GPT-4.5Turbo was officially released on Thursday.

　　Search engines such as Bing and DuckDuck Go have indexed the product pages of GPT-4.5Turbo, and netizens speculated that the official release date of GPT-4.5 Turbo might be this Thursday-the anniversary of the release of GPT-4.

　　[financial calendar]

　　On December 23rd, the Office of the US Trade Representative announced that it had launched a 301 investigation against the chip industry in China. The target of this survey is mainly the mature process chips in China.

　　In the past few years, we have the impression that the United States is more concerned about advanced process chips. The United States has done the same. From products to technology and manufacturing equipment, every time the United States introduces trade restrictions, it is restricting China from acquiring advanced process chips from different dimensions.

　　But now, America’s goal has changed.

　　How to understand such a change?

　　This time, there are many clues about the changes in the United States in the official notice of the United States launching the 301 investigation.

　　In the notice, the Office of the U.S. Trade Representative mentioned that it would investigate whether there is overcapacity in China’s chips and the dependence of downstream industries in the United States on China caused by these chips.

　　The reason why these investigation directions are related to the specific problems that the United States is worried about.

　　Recently, the U.S. government completed a study, and according to the research results, two-thirds of American products use mature process chips from China.

　　For this phenomenon of "dependence" on China chips, the US government has a great anxiety.

　　In the eyes of the US government, the development of China’s chip enterprises not only means that the market share and jobs of American chip enterprises have been "robbed", but also means that China has more chips and "threatens" the safety of the American industrial chain.

　　Therefore, according to the "investigation results", the United States will decide whether to impose tariffs or introduce other measures to prevent China chips from entering the US market.

　　In this way, many people can feel that the American rhetoric is already a cliche — — From the relatively elementary manufacturing industries such as chemicals and textiles in previous years to the electric vehicles in recent two years, as long as China has established an advantage in the global market, the United States has initiated investigations and imposed tariffs on the grounds of "disrupting market order at low prices" and "threatening American economic security".

　　However, after inquiring about the data of China’s export of chips to the United States, Mr. Tan found that things were not so simple.

　　△ Since the export data of December this year has not been released, the statistics have selected the data of the same period in the past ten years.

　　It can be seen that China’s exports of chips to the United States have not changed much in the past three years. In other words, "the United States relies on China’s mature process chips" is not a new phenomenon this year, which is not the time when the United States launched an investigation.

　　And the timeline goes back to 2022 — — At the end of this year, China’s chip exports to the United States gradually stabilized at today’s level. Taking 2022 as the coordinate, and then combing how the United States has discussed mature process chips in these years, we will find that,What really promoted the 301 survey is that the cognition of mature process chips in the United States has changed.

　　American media, American think tanks and American government were selected as the statistical objects. In 2022, there was little discussion about "China mature process chips". This year, Biden’s export control measures have just been introduced, which are full of restrictions on China’s advanced manufacturing processes. Americans also have their own hot spots to catch up with.

　　By the end of 2022, China’s chip exports to the United States have increased by more than 60%, reaching the biggest increase in the past decade. At this time, a different voice appeared.

　　At the beginning of 2023, an American think tank published an article pointing out that the focus of the US government was biased, and they ignored the importance of mature process chips.

　　Tan Zhu noticed that this article pointed out a key problem: it is misleading to divide chips into "advanced process" and "mature process".

　　Unlike many people’s first reaction, "mature process chips" do not use outdated technologies, including new technologies such as silicon carbide, which are all used in mature process chips. At the same time, such chips will be continuously improved to meet new requirements and applications.Therefore, traditional chips are destined to maintain a high degree of correlation with emerging industries and technologies for a long time.

　　Tracing back to the source, the term "mature process chip" was originally a military term. In order to promote the development of military technology, the United States made a distinction between "advanced process chip" and "mature process chip". This distinction has nothing to do with industrial logic.

　　The importance of this article lies in the fact that this cognitive rectification has had an effective impact on the US government:

　　｜｜In January this year, the US-China Special Committee on Strategic Competition of the US House of Representatives sent a letter to the US Department of Commerce and the Office of the US Trade Representative, requesting to launch an investigation into mature process chips in China. This is the starting point of the investigation.

　　｜｜Soon, the US Department of Commerce responded first. This year, the U.S. Department of Commerce launched a research on the basis of the U.S. semiconductor industry. This study draws the conclusion that the United States "depends" on China’s mature process chips through statistics.

　　｜｜Based on the evidence provided by the US-China Special Committee on Strategic Competition and the data studied by the US Department of Commerce, the Office of the US Trade Representative finally decided to launch the 301 investigation.

　　Initially, the US-China Special Committee on Strategic Competition paid attention to the progress of mature process chips in China, largely because it saw this article.

　　In their letters asking the US government to launch an investigation on mature process chips in China, a large number of opinions and data of this article appeared.

　　△ Letter from the "US-China Special Committee on Strategic Competition" requesting an investigation on mature process chips in China.

　　In other words, this 301 survey reflects that the cognition of the relationship between industrial competition and technological progress in the United States is changing. This also makes this 301 survey more symbolic than before.

　　Cao Yun (Former practitioners of chip enterprises in China）：

　　● From the perspective of our industry, technological innovation will be divided into different links to discuss. Now, the improvement of chip production process is the most important, not the innovation of the source.

　　●　The improvement of chip production process is divided into process node improvement, material improvement, yield improvement and detail optimization. As mentioned above, using silicon carbide on mature process chips belongs to material improvement.

　　China has a unique advantage that it has the most comprehensive manufacturing category in the world, which means that we can promote innovation in all processes and links of the chip industry chain.

　　From this point of view, it is unrealistic for the United States to try to block the development of advanced process chips in China and then suppress the whole chip industry in China.

　　Now, the United States is beginning to understand that simply blocking other countries’ access to advanced technology and products in areas where it has technological advantages cannot maintain its advantages for a long time.

　　From this "reflection", we can also better understand the objective law of the development of the chip industry.

　　You can look at such a set of data.

　　In 2024, the US chip market is expected to grow by 23.7% year-on-year. But there are two important driving forces behind this data:

　　In 2024, the global chip market is picking up, and it is expected to increase by 20.7% year-on-year. At the same time, NVIDIA’s revenue in 2024 is expected to increase by over 100% year-on-year, becoming the biggest driving force for the growth of the US chip market.

　　But it also means that most chip companies behind it are "dragging their feet".

　　Master Tan counted the top ten chip companies in the United States except NVIDIA, and found that 80% of them had a revenue growth rate far lower than that of the global chip market this fiscal year. Even, five companies are expected to have negative growth this year.

　　By combing the chip policy of the U.S. government in the past four years, we can see that the thinking of the United States is basically "two-legged": subsidizing American enterprises through the Chip and Science Act, and restricting the export of advanced technologies to curb the development of China enterprises.

　　After four years, obviously, the result is not ideal.

　　US Commerce Secretary Raymond recently said: It is futile to try to contain China. But there is still a half sentence that she failed to say. At the same time, the US government’s assistance policy was not successful. These two factors have jointly caused the dilemma of American chip companies today.

　　The Chip and Science Act was signed in August 2022, but it was not until the end of 2023 that the US government approved the first subsidy. According to relevant disclosures, as many as 40% of large-scale projects have been postponed or stopped indefinitely because of the ineffective promotion of the Chip and Science Law and the Inflation Reduction Law.

　　Not only can the US government not help American companies, but more importantly, this year was originally a year of recovery in the global chip market, and many chip companies are expecting a rebound in profits. However, the "chip method" has become an obstacle to this vision — — The "chip law" has set up protectionist provisions, and accepting subsidies from the United States means giving up markets in other countries.

　　The choice of market is a particularly important issue this year.

　　Professionals told Tan Zhu that a large number of chip companies were pushed to set up factories in the United States through huge subsidies and political pressure, resulting in industrial transfer under non-market conditions, which would lead to increased costs. According to estimates, the cost of opening a new chip factory in the United States is about 30% to 50% higher than that in Asia, which will be shared among chips produced in the United States in the future.

　　In the long run, perhaps the profits of these factories in the future can make up for these costs. But for many companies, they don’t have the luxury to think about the market in 10 years.

　　In the past three years, every year, the global chip market has a new atmosphere:

　　｜｜From 2022 to 2023, the phenomenon of "hoarding goods" first appeared in the global chip market, which promoted enterprises to expand production, and then there was the problem of oversupply.

　　｜｜In 2024, the focus of the global chip market shifted from the previous CPU chip to the GPU chip driven by artificial intelligence.

　　When the wind is high and the waves are urgent, should we choose the mature industrial chain that has been verified in the global chip market, or choose the illusory idea of the US government to build a new industrial chain?

　　Professionals told Tan that the United States interfered with the balance of supply and demand of global chips, and trade disputes would follow. For enterprises, these are risks.

　　The more global scientific and technological innovations emerge and new development opportunities emerge, choosing unknown risks is essentially giving up development opportunities.

　　In other words, the act of reshaping the global chip industry chain has not made the United States more "safe" as the US government said, but has destroyed the market environment on which American enterprises depend for survival and growth.

　　Master Tan once discussed a question with chris miller, the author of Chip Wars. What was the final result of American intervention in the global chip industry chain?

　　Chris miller (American historian, author of Chip Wars.）：

　　●　The most likely situation is that there are more and more "separated" supply chains, which eventually produce completely independent or parallel supply chains. At present, this trend has appeared.

　　●　An obvious impact is that this will lead to inefficiency, and countries will spend a lot of manpower, financial resources and time on the same research. The cost is huge, and the sacrifice of the chip industry is also huge. You know, we could have made progress together and accelerated the development of technology.

　　The peak of human wisdom should have been used to explore the sea of stars. It would be a pity if it was consumed in meaningless competition for the sake of zero-sum game.

　　Not to mention, the way of competition chosen by the United States has been proved to be the wrong way.

　　From 2018 to 2021, American importers paid nearly $123 billion to cover the increased tariff costs. According to the report of the American Chamber of Commerce, if the tariff rate of 25% of the previous administration is continued, the United States will lose $190 billion annually by 2025 and $250 billion annually by 2030, which will make the United States lose nearly $1 trillion in economic growth potential.

　　According to the United States’ own forecast data, by 2029, China will further expand its global market share, accounting for about 50% of the global market for mature process chips.

　　On this basis, the chip will also be related to the normal operation of key industries such as communications, enterprises, electronic equipment and industrial manufacturing in the United States.

　　If the United States imposes tariffs on China chips, it will surely bring huge losses to itself.

　　Not to mention, this time, 301 survey is used, which points to unfair trade in global trade. Professionals told Tan Zhu that in the global chip industry, the United States has the largest subsidy, and the United States is the biggest unfair manufacturer.

　　What the U.S. economy really needs is not to think hard about what kind of China products to suppress, but more importantly, to completely jump out of this thinking and help American enterprises return to the wave of free flow of global trade to find opportunities for growth.

　　For any American government, this is the truth they need to see.

CCTV News:At present, the nucleic acid testing of all staff in Wuhan, Hubei Province is being carried out in an orderly manner. How to finish the task efficiently in the shortest time? The power behind this is not only the concerted efforts of medical staff and citizens to fight the epidemic, but also the "hardcore" technology "weapons" invested by medical institutions and technology enterprises.

At 8 o’clock in the evening, more than 200 people in Longyang Street, Hanyang District were waiting in line to do nucleic acid. Liu Zhilian, the person in charge of the scene, had a special interview during the busy interval.

Wu Hui, who came for an interview, has 11 years’ experience as a nurse, and she is eager to participate in this epidemic.

Volunteer Wu Hui:Although I have left the hospital now, I think we need to come forward and contribute our little strength in this epidemic.

Because of her rich experience, Wu Hui passed the interview. She immediately put on a red vest and prepared for tomorrow’s nucleic acid test with other volunteers. In more than 2,800 sampling points in Wuhan, there are still many "uninvited" volunteers like Wu Hui.

In Donghu Road community nucleic acid testing point, every resident has a special guide when testing nucleic acid.

Li Feng, the fourth-level director of the directly under the authority Working Committee Office of Hubei Provincial Party Committee:I started to make preparations at 6 o’clock in the morning and worked until the early morning. Last night, I worked until nearly 12 o’clock.

The strength of science and technology is also helping the whole staff to detect nucleic acids. Ms. Wu of Donghu community felt a robot doing nucleic acids.

Ms. Wu, a resident of Donghu Community in Wuhan:It will move left and right, then turn around, and you will obviously feel something circling in the upper part of your throat.

This is the first mobile nucleic acid detection vehicle in Hubei. The robotic arm equipped with artificial intelligence algorithm collects one sample in one minute, and can detect nucleic acid of 24 samples at the same time, and the results can be obtained within 45 minutes at the earliest.

Li Yirong, Director of Laboratory of Zhongnan Hospital of Wuhan University:The traditional PCR technology is divided into three temperatures to amplify it (sample), which means that it takes time for the instrument to switch between the three temperatures, but it only has a temperature of 60, so it can shorten the time.

　　BEIJING, Dec. 29 (Reporter Qiu Yuzhongqing) On January 1, 2018, China was the first one-way tax law to promote the construction of ecological civilization — — The Environmental Protection Tax Law will be formally implemented, which also means that the sewage charge system that has been implemented for nearly 40 years will withdraw from the historical stage.

　　Do ordinary residents have to pay environmental taxes? Are the collection standards the same everywhere? What changes will "fee to tax" bring to enterprises? Zhongxin. com has combed and interpreted this.

　　On February 12, 2016, many places in Shandong suffered from smog weather. Image source: vision china

　　Do individuals have to pay environmental taxes?

　　The Environmental Protection Tax Law stipulates that enterprises, institutions and other producers and operators that directly discharge taxable pollutants into the environment in People’s Republic of China (PRC) and other sea areas under the jurisdiction of People’s Republic of China (PRC) are taxpayers of environmental protection tax, and they shall pay environmental protection tax in accordance with the provisions of this law.

　　In other words, ordinary residents are not included in the scope of taxation and do not have to pay environmental taxes. According to local media reports, the responsible persons of tax authorities in Hebei, Jiangxi, Anhui and other places have made it clear that individual residents do not pay environmental protection tax.

　　When do you start paying taxes?

　　Zhongxin. com reporter learned from State Taxation Administration of The People’s Republic of China that the first collection period of environmental protection tax will be around April next year, not to say that tax returns will be started after January 1st.

　　In this regard, Shi Zhengwen, director of the Finance and Tax Research Center of China University of Political Science and Law, pointed out in an interview that the environmental protection tax is "calculated on a monthly basis and declared quarterly", and the reporting period and the time when the specific tax obligation occurs are two different things.

　　Shi Zhengwen said that the tax calculation began on January 1, but the declaration was from April 1 to 15. During this half-month period, enterprises had to declare their taxes.

　　Data Map: In Guozhuangzi Village, Xinkou Town, Xiqing District, Tianjin, electric heating pipes instead of coal are connected to every household. China News Service reporter Yan Yushe

　　What pollutants are taxed?

　　The Environmental Protection Tax Law clearly states that air pollutants, water pollutants, solid waste and noise are listed as taxable pollutants.

　　Taxable air pollutants include sulfur dioxide, nitrogen oxides, carbon monoxide, chlorine gas, etc. Taxable water pollutants include total mercury, total cadmium, total lead, petroleum, animal and vegetable oils, formaldehyde, etc.

　　It is worth noting that noise refers to industrial noise according to the Table of Items and Taxes of Environmental Protection Tax attached to the Environmental Protection Tax Law. This means that construction noise and traffic noise are not included in the scope of collection.

　　According to the Law on the Prevention and Control of Environmental Noise Pollution, environmental noise refers to the sound produced in industrial production, construction, transportation and social life that interferes with the surrounding living environment.

　　Among them, industrial noise refers to the sound that interferes with the surrounding living environment when using fixed equipment in industrial production activities; Construction noise refers to the sound that interferes with the surrounding living environment during construction.

　　How much do you pay?

　　According to the Environmental Protection Tax Law, the amount of environmental protection tax has both an upper limit and a lower limit. The tax range of air pollutants is from 1.2 yuan to 12 yuan per pollution equivalent, and that of water pollutants is from 1.4 yuan to 14 yuan per pollution equivalent.

　　Pollution equivalent refers to a comprehensive index or unit of measurement to measure the environmental pollution caused by different pollutants according to the harmful degree of pollutants or pollution discharge activities to the environment and the technical economy of treatment.

　　For example, in terms of industrial noise, different decibels exceed the standard, and the monthly tax levied is different. For example, if it exceeds the standard by 1-3 decibels, 350 yuan will exceed the standard by more than 16 decibels per month, and it will cost 11,200 yuan per month.

　　Data Map: Wetland Ecological Restoration Project in Sanbiao Township, Xunwu County, Jiangxi Province. Su Lucheng photo

　　Is the tax payment standard the same everywhere?

　　According to the Environmental Protection Tax Law, each province has certain discretion in the specific applicable tax amount of air pollutants and water pollutants. In other words, the specific tax payment standards may be different from place to place.

　　"This is equivalent to giving local governments greater discretion," Shi Zhengwen said. "The Environmental Protection Tax Law mentions three factors, namely, the environmental carrying capacity of the local area, the current situation of pollutant discharge and the requirements of economic, social and ecological development goals. According to these three factors, local governments determine the specific applicable tax amount, which varies greatly among different provinces."

　　Among them, Beijing-Tianjin-Hebei and surrounding provinces generally set higher taxes on air pollutants and water pollutants. The applicable tax amount of taxable air pollutants in Beijing is 12 yuan per pollution equivalent, and the applicable tax amount of taxable water pollutants is 14 yuan per pollution equivalent, both of which are implemented according to the upper limit of tax range stipulated in the Environmental Protection Tax Law.

　　Will it increase the burden on enterprises?

　　The relevant person in charge of State Taxation Administration of The People’s Republic of China told the reporter of Zhongxin.com that the environmental protection tax was jointly promoted by the Ministry of Environmental Protection, the Ministry of Finance and the State Administration of Taxation. According to the standard of "shifting taxes and fees", the past sewage charges were directly converted into environmental protection taxes. Of course, generally speaking, the design of policies is not aimed at collecting money, but mainly to stimulate the awareness of environmental protection and boost the consciousness of environmental protection.

　　The person in charge of the Regulation Department of the Ministry of Environmental Protection said that changing the sewage charges into environmental taxes is conducive to improving the rigidity of law enforcement, reducing local government intervention and internalizing environmental costs. Environmental protection tax is levied according to the amount of emissions, with more emissions and more payments, less emissions and less payments, which is conducive to promoting enterprises to improve their environmental protection level and reduce pollutant emissions.

　　Data Map: Seven enterprises and institutions withdrew from Fuxian Lake Nature Reserve in Yunnan, showing their determination to protect the environment. China News Service reporter Ren Dongshe

　　Does the environmental protection tax belong to the local government or the central government?

　　On December 27th, the State Council issued the Notice on the Ownership of Environmental Protection Tax Revenue, which made it clear that environmental protection tax was local revenue.

　　The circular pointed out that in order to promote the protection and improvement of the environment and increase investment in environmental protection, the State Council decided to use all environmental protection taxes as local income.

　　The current sewage charges are divided between the central and local governments by 1: 9. Wang Jianfan, director of the Department of Taxation and Administration of the Ministry of Finance, pointed out earlier that in order to mobilize local enthusiasm, considering that local governments bear the main responsibility for pollution control, it is planned to take all environmental taxes as local income, and the central government will no longer participate in the sharing. (End)

　　Life is easy to get old, but it’s hard to get old. The ninth day of the ninth lunar month is China’s Double Ninth Festival, which is also called "Old People’s Day". Respecting the elderly is the traditional virtue of the Chinese nation. Just after the Double Ninth Festival, Luo Tianjiong, director of the geriatrics department of Nanjing Hospital of Traditional Chinese Medicine, sent nine health guides, aiming at caring for the elderly and caring for their health.
Correspondent Xia Fan Yangzi Evening News/Zi Niu News Trainee Reporter Lu Yanlin

　　1. Pay attention to fall prevention.

　　Due to the increase of osteoporosis and bone fragility, the elderly are prone to fracture, soft tissue injury, psychological trauma and other serious consequences when they fall, and their incidence rate rises sharply with age. Luo Tianqiong said that the elderly need to pay attention to the prevention of falls at home, shoes should be anti-slip, and the light should be bright enough. Once they fall, they should be actively sent to the hospital. 48 hours after the fall of the elderly is the prime time for treatment.

　　2. Reasonable diet and balanced nutrition

　　Light diet, less oil and salt, fresh and hygienic food, and balanced nutrition. The diet is mainly cereal, with a matching thickness. Eat regularly and quantitatively, chew slowly, ensure that there are vegetables in the meal and fruits every day, take in some high-protein foods such as fish, meat and eggs, often drink milk to supplement calcium, and take vitamin D in the sun for 15-20 minutes every day to promote the absorption of calcium, actively replenish water and pay attention to prevent sunburn. Advocate not smoking, drinking less and drinking too much.

　　3. Exercise properly and do what you can.

　　With the growth of age, many elderly people are more and more reluctant to exercise. Although they understand that proper exercise can promote health, what they don’t know is that due to lack of exercise, elderly people often suffer from decreased resistance, muscle atrophy, physical decline, etc. Over time, diseases come one after another. It is suggested that the elderly choose appropriate exercise methods, such as walking, square dancing, Tai Ji Chuan, Baduanjin, etc., and the exercise intensity should be tolerated by individuals.

　　4. Ensure sleep and take a proper lunch break.

　　The sleep of the elderly is shallow and easy to wake up. Half of the elderly in China have sleep disorders. Long-term lack of sleep will cause mental fatigue, dizziness, weakness of limbs, etc. Luo Tianjiong suggested that the elderly should ensure six hours of sleep and take a proper lunch break for half an hour every day, which is conducive to physical and mental health. When insomnia occurs, they can massage points such as Neiguan, Shenmen and Sanyinjiao to help sleep.

　　5. Brush your teeth frequently, wash your hands frequently and take a bath frequently.

　　Brush your teeth in the morning and evening, and rinse your mouth after meals. For the elderly with dentures, brush them clean and soak them in cold water when not in use, and change your toothbrush every three months. Wash your hands and bathe frequently to resist the invasion of bacteria and enhance your resistance.

　　6, keep the stool unobstructed

　　Due to the continuous decline of physical function, the gastrointestinal peristalsis of the elderly will also be very obvious, often manifested as constipation. In view of constipation of the elderly, Luo Tianjiong suggested keeping the habit of regular defecation, drinking more water, not eating laxatives indiscriminately, or massaging the abdomen clockwise around the navel to relieve constipation.

　　7. Don’t stop drugs for chronic diseases.

　　Many elderly people think that chronic diseases such as hypertension and diabetes have no impact on their lives, so they choose to stop taking drugs, but they don’t know that stopping taking some drugs is likely to cause recurrence or "rebound" of the original diseases and even accidents. Luo Tianqiong stressed that if there is a need to stop taking drugs, you must first consult a doctor and gradually stop taking drugs under the guidance of a doctor.

　　8. Keep a good attitude

　　Luo Tianjiong reminded that emotional excitement and bad emotions will affect the physical and mental health of the elderly, keep a calm mind, communicate with people more, and avoid depression, anxiety and mood swings, especially patients with basic diseases such as hypertension, heart disease and cerebral infarction.

　　9. Strengthen self-health management.

　　Director Luo Tianqiong said that it is very necessary for the elderly to have a physical examination. It is necessary to actively prevent the occurrence and development of diseases, so as to achieve early detection, early diagnosis and early treatment. It is recommended that the elderly have a physical examination once a year, and people with basic diseases should have regular physical examinations on the advice of doctors, and be responsible for individuals and their lives.

Diablo 3 is an action role-playing game owned by Blizzard. Necromancer’s skill combination recommends plague ice gun stream and toxic bone spear stream, and equipment recommends the grace of Sanzang Inarius, the incarnation of blood set Tagao and the bone armor of pet set Rathma, all of which are very powerful.

Diablo 3 necromancer’s equipment skill collocation is as follows:

Skill collocation

1. Plague ice gun flow

The active skills, passive skills and gouyu collocation of plague ice gun flow are as follows. The skill collocation of necromancer mainly realizes the effect of quick drawing through corpse spear and fragility. The advantage of this skill combination is that it can quickly brush the map. When the corpse spear is matched with fragile collision, it will increase the critical strike probability of the corpse spear to the enemy and achieve the deceleration effect. Weakness, with the blessing of Gouyu’s hungry grave, will consume 10% of the Necromancer’s blood, but the standard blood of the vulnerable enemy can be increased from 15% to 18%, which will enable ordinary players to quickly brush through the first 100 layers of the Great Mystery. In the actual experience, although the Necromancer’s plague ice gun stream can achieve the effect of extreme drawing, this set of skills pays great attention to the players’ skill cooling, attack speed and the recovery of the spirit. The recovery of the spirit can be achieved through the realm of the dead and devouring, while the skill cooling and attack speed require players to work harder on equipment and gems, so as to achieve the ultimate painting effect.

2. Toxic bone spear flow

The active skills, passive skills and gouyu of toxic bone spear flow are as follows. This skill is to use bone spear (dead bone marrow) to brush the picture. It is understood that the bone spear (dead bone marrow) can improve the output damage of the bone spear. In the case of passive skill bone spur proliferation, the output damage of the bone spear can be increased to about 515%~535%. Coupled with the coma effect of the bone nail (bone dislocation) and the freezing effect of the dead field (dead cold land), it is also convenient for players to control the whole monster. As for the advantage of this set of skills, it is that the control effect is better and the ability to survive and recover is stronger. The weakness is that the cooling time of control skills is relatively long. Even if the passive skill "Desperate Loyalty" is added, it is difficult to change the shortcomings of this skill set.

Equipment collocation

1. Santa Claus — — Enze in Inarius

Because of its global injury increase of up to 2750%, the holy sleeve is very lubricated in fitting, and it is very enjoyable whether it is corpse gun, corpse explosion, Galaxy gem special effect or pet flow.

2. Blood sleeve — — Tago’s incarnation

Although the blood set was overshadowed by the holy set in the single-player mode, it was very popular in the team mode, and the utilization rate was amazing.

3. Pet condoms — — Rathma’s bone armor

At present, pet covers have some problems, such as stuck, inefficient injury reduction, and sudden death Bug of pets, so the pet covers have fallen out of the first-line play of necromancers. However, according to the test suit data, after the pet covers are repaired or enhanced, they will still perform well and even return to the mainstream ranks of necromancers.