Sun Simiao was a famous Taoist, physician and health care practitioner in the Tang Dynasty. He made immortal contributions to Taoist medicine and health care, and still occupies a very important position in the history of medicine. Sun Simiao devoted his whole life to the study of Taoist medicine and health preservation, and his longevity of 1.42 years was admired by later generations. He wrote many books in his life, including the theory of nursed back to life, the theory of nursed back to health in the pillow, the theory of nourishing the mind and refining qi, the thousand women, the thousand women, and so on, and was respected as the "king of medicine" by later generations.

In the long-term medical practice, Sun Simiao summarized the efficacy and function of diet, which he thought was an important part of people's health cultivation. In his book, Sun Simiao quoted Bian Que, a medical scientist, and expounded the general principle of keeping in good health by diet: "The essence of living and living lies in food, and the way to cure diseases and save lives lies in medicine. People who don't know what to eat will never have enough to eat all their lives; There is no cure for those whose properties are unknown. Therefore, food can dispel pathogenic factors, and drugs can soothe the nerves and nourish the four qi ... "He believes that diet is as important as taking medicine, which can cure physical diseases. Sun Simiao thinks that we should pay attention to methods in our daily diet. He said, "Be careful what you say, but be frugal in your diet. People who are good at nourishing nature eat first when they are hungry and drink first when they are thirsty; If you eat a small amount, you don't want to eat more. It's hard to disappear I often want to be hungry, hungry. " People who are good at keeping in good health pay great attention to diet regulation. Eat moderately and regularly, don't eat too much and don't starve. They should eat on time every day, not too full or too hungry, or it will be harmful to their health. Sun Simiao thought that "satiety hurts the lungs, hunger hurts the qi, salty hurts the tendons, and acid hurts the bones. Therefore, every time you learn to eat lightly, you should chew well and let rice fat enter your stomach, not alcohol fat. " Hunger and satiety are enemies of health. He stressed that diet should be taboo and regular.