In western medicine nutrition, it is often analyzed how much protein, vitamins, minerals and other nutritional elements a food contains. In the theory of traditional Chinese medicine, the sexual taste of food will be analyzed emphatically. Four characteristics of food: cold, hot and cold. Ancient medical scientists believed that medicine and food were homologous, and food, like Chinese medicine, had four properties: cold, hot, warm and cool. These four attributes are also called four qi, which are mainly summarized according to the human body's reaction after eating. The properties of food are different from temperature. For example, a cup of hot green tea will feel hot at first, but it will soon feel cold. This shows that green tea is cold, and you can drink green tea to clear away heat and relieve summer heat in summer. If after eating a kind of food, the body has no obvious feeling of fever or chills, it is flat. For example, the rice we eat every day is flat. It should be noted that the properties of food are not immutable, and different eating methods will affect the properties of some foods. For example, lotus root is cold when eaten raw, and becomes slightly warm when cooked. When other cold foods are cooked and eaten, the coldness will also weaken. Different foods have different effects on human body after eating. Celebrities in Wei and Jin dynasties will take Wushi powder for health preservation. The main components of Wushi Powder are stalactite, viologen, sulfur, halloysitum rubrum and Bai Shiying. Huangfu Mi, a historian in the Jin Dynasty, once said that after dinner, you eat ice naked in the middle of winter and feel bored in the middle of summer. Take off your clothes and eat ice in winter, and you will be bored in summer. It can be seen that the attribute of Samurai III is very hot. After eating Wushi powder, you should stick to walking and let your anger out. This is called walking. This is the origin of the word walking. Now, of course, no one will eat black food, but in our daily diet, we can also find the specific application of the four characteristics of food. For example, when we eat cold crabs, we should heat ginger and stew chicken with cold mushrooms. The five flavors of food: sour, sweet, bitter and salty food refers to the smell people smell through their noses and the taste they feel when they eat in their mouths. In ancient times, there was a legend that Shennong tasted a hundred herbs, and what he tasted was the taste of a hundred herbs. Therefore, Shennong is regarded as the ancestor of medicine. The five flavors we often say in daily life are sour, sweet, bitter, spicy and salty. The five flavors mentioned in the theory of traditional Chinese medicine are similar except that sweet and spicy are replaced by synonymous sweet and spicy. The taste of food is the subjective feeling of human body, which is naturally closely related to people's mood and consciousness. According to the theory of traditional Chinese medicine, the five flavors will have different effects on the mind, and then affect the health of the human body. Traditional Chinese medicine dietotherapy is based on different physical conditions, combined with its cold, hot and cold properties, to adapt or restrain the mind by eating different flavors of food, so as to adjust the function of zang-fu organs and the operation of qi and blood, and achieve the goal of balance and harmony among the five organs. As the saying goes: onion is hot and spicy, and mustard is hot and cramped. This shows that the same spicy food has different effects on human organs. For example, spicy onions are noses. If you catch a cold in winter, some people will cook soup with onions, add brown sugar or ginger, put them in a bowl while they are hot, and inhale hard together. This is the convincing origin. (Instructor: Deng Guilin, Director of the Second Department of Traditional Chinese Medicine Hospital)