(1) diet and health: habitually referred to as "food nutrition" "food supplement" is a general reference to the application of diet to achieve the nutrition of the organism, to maintain health or promote health activities; nutrition refers to the body to ingest, digest, absorb and utilize food or nutrients, in order to maintain the normal life activities of the process. Nutrition is the process of taking in, digesting, absorbing and utilizing food or nutrients to maintain normal life activities. As early as two thousand years ago, Chinese medical doctors recognized the role of diet on people. Diet is considered to be an indispensable nutrient. Suwen - Ping people weather theory" pointed out that "people with water and grain-based, so people out of water and grain will die. According to Chinese medicine literature statistics. Commonly used nearly a hundred kinds of food tonic health effects, counting the ear, eyesight, hair, hair, increase the strength, benefit Zhi, peace of mind, skin, beauty, light body, solid teeth, fat people, strong tendons, aphrodisiacs. Seeds (help pregnancy) benefit life ...... and more than twenty kinds. These roles are important in improving the quality of human health and preventive health care. (2) dietary therapy: habitually referred to as "food therapy" "food treatment" is a general reference to the use of diet to treat or assist in the treatment of disease activities. Sun Simiao once pointed out that: "food can get rid of evil and safe internal organs, pleasing to the spirit, refreshing the spirit, in order to capitalize on the gas and blood." Nowadays, many results of Chinese medicine dietary therapy is also gradually confirmed by modern medicine, such as: clinical application of celery to prevent and control hypertension; application of oats to prevent and control hyperlipidemia; application of jujube to prevent and control anemia; application of fungus to prevent bleeding of the arteries of the fundus of the eye; application of lily, bitter melon and other prevention and treatment of viral and bacterial infections and other diseases. (3) dietary restraint: habitually called "food festival" "food", referring to the dietary methods, ways, including the diet of reasonable customs, dietary hygiene system; Chinese medicine food festival is extremely rich in content, which reflects the dietary civilization of the Chinese nation and the ancient level of hygiene, such as Chinese medicine advocates Comprehensive diet without partiality; do not overeat and overeat, there are limits to the amount of food; pay attention to food hygiene and cleanliness, good hygiene habits before and after eating, into the tea into the amount of alcohol and so on