The Su Wen? The Four Qi and the Gods of the Great Theory of the Four Qi said: “The sage does not treat the sick to treat the sick, not to treat the chaos to treat the chaos. If the disease has become a medicine after the medicine, chaos has become a cure after the cure, as if thirsty and wear well, bucket and cast cone, is not also late.” Explain the importance of disease prevention. Now, there is a strange circle, that is, as people’s living standards continue to improve, but the prevalence of hypertension, diabetes, cardiovascular and cerebrovascular disease is increasing, the onset of age is becoming younger. People can’t help but ask, why is this? According to incomplete statistics, more than 15,000 people die every day in China due to unreasonable dietary structure and unhealthy lifestyle, accounting for more than 70% of all deaths. Extensive information research studies show that unhealthy lifestyle and unreasonable diet structure can lead to diabetes, hypertension, hyperlipidemia, obesity, cardiovascular and cerebrovascular diseases, tumors, etc. Therefore, we should ask ourselves whether we have good eating habits and a healthy lifestyle. People are food-oriented. The role of dietary factors on human health is 13%, second only to genetic factors, and much greater than the role of medical and health condition factors, which is only 8%. But what is a reasonable dietary structure? A reasonable dietary structure is pyramidal in shape. The bottom of the pyramid is cereals, the second layer is vegetables and fruits, the third layer is chicken, duck, fish, eggs and dairy products and legumes, and the fourth layer is oil, salt and sugar. The Institute of Nutrition and Food Hygiene of the Chinese Academy of Preventive Medicine has proposed a “4-4-4-3-3” system. That is, eat 400 grams of grain, 400 grams of vegetables, 40 grams of beans, 300 grams of animal food and 30 grams of oil every day. Dietary carbohydrate synthesis of energy should account for 65% of the total energy, food rich in carbohydrates, accounting for about 70% or more. Lack of the first layer, the body does not have enough energy needed, relatively more meat intake, fat, cholesterol increased, causing hyperlipidemia, atherosclerosis, hypertension, cardiovascular and cerebrovascular disease risk factors will increase. Excessive intake of vegetables and fruits can also cause energy deficiency, certain trace elements or vitamin intake is too low. Therefore, not eating or eating less staple foods is an incorrect diet. With the development of the economy, the structure of our diet has changed significantly. The consumption of high-calorie, high-fat food has increased, and eating foreign fast food and drinking sugary drinks are becoming more and more common. The calories provided by fat in our food rose from 9% in 1959 to 27% in 1992, close to the upper limit of 30%. The calories from animal fats in many households exceed 60% of the dietary composition ratio. Therefore, the metabolic syndrome consisting of metabolic disorders such as hypertension, hyperlipidemia and diabetes centered on obesity is gradually increasing, and cardiac and cerebrovascular diseases and malignant tumors have become the first three causes of death in China. In addition, high-calorie, high-fat food can lead to delayed gastric emptying, functional dyspepsia, gastroesophageal reflux disease and other digestive tract diseases, and therefore increasing. Dietary fiber is known as the seventh most important nutrient. The effects of dietary fiber on the body include laxative, lipid-lowering and blood sugar-lowering. Insufficient dietary fiber can lead to obesity, diabetes, atherosclerosis, coronary heart disease, constipation, etc. What is dietary fiber? In 1998, the Scientific Committee of the American Society of Cereal Chemistry assigned the definition of dietary fiber as: Dietary fiber is the edible part of plants or carbohydrate analogues that are not digested and absorbed in the human small intestine but can be fermented in whole or in part in the large intestine. Dietary fiber includes polysaccharides, oligosaccharides, and lignin-related plant substances. It is widely found in wood pulp, rice bran, wheat bran, beet residue, corn, soybeans, hemp, fruit peel, cuttlefish, wine lees, and tofu residue. People’s daily intake of dietary fiber should be about 20-35g. As the saying goes, water can carry a boat or overturn it. Salt, can replenish the electrolytes necessary for the body. However, eating too much salt for a long time can lead to hypertensive disease. According to the survey, Eskimos eat only 4 grams of salt a day, the incidence of hypertension is 4%, Americans into the salt daily 10 grams, the incidence of hypertension is 10%, Japan Hokkaido farmers into the salt daily 27 grams, the incidence of hypertension of 40%. China’s dietary habits are ‘south sweet north salty’, the prevalence of hypertension in Beijing is four times that of Guangzhou. According to WHO’s recommendations for the prevention and treatment of hypertension and diabetes, a person’s daily salt intake should not exceed 5g, while the average daily salt intake of Chinese people reaches 13.5g. Therefore, a low-salt diet is important for the prevention and treatment of hypertension. For patients with diabetes or obesity and low glucose tolerance, a sugar-free diet is especially important. However, what is commonly referred to as a “sugar-free diet” is only free of sucrose. However, because it is made of grain and contains many sugars, it can still be absorbed into glucose and sucrose after digestion. So patients with diabetes or low glucose tolerance should get out of the misconception that “sugar-free food = sugar-free” and avoid eating sugar-free food without fear. In addition, carbohydrates should not be left out or eaten too little. Because eating too little will lead to a lack of glucose sources, it will cause excessive sugar xenobiotic, resulting in ketoacidosis. Due to our special food culture, we do not share meals nor do we like to use public chopsticks and spoons when we gather together, because we feel that it looks strange and hinders the exchange of feelings. The transmission route of H. pylori (Hp) is precisely oral-oral transmission. Now research has found that Hp is the culprit of chronic gastritis, peptic ulcers, and gastric cancer. In order to prevent the spread of Hp and other infectious diseases, it is undoubtedly necessary to promote a healthy food culture. To prevent diseases, eating habits are the key. Chinese medicine says “five tastes and harmony, do not be partial to”, indicating that acid, bitter, sweet, pungent and salty, which can not be more. By the same token, overeating, overeating cold, fatty, sweet and greasy are harmful. The four cornerstones of health are: reasonable diet, moderate exercise, quit smoking and limit alcohol, and balanced psychology. It is said: “a vegetable a bean, an egg with some meat, grains and cereals to eat enough, everyone live 99!”