It is advocated that diet should be nursed back to health, replenish essence and deficiency, correct the deviation of yin and yang in the viscera, and achieve the purpose of conditioning diseases and prolonging life.

Huangdi Neijing put forward the principles of diet adjustment such as "harmony of five flavors" and "moderate diet". Sun Sixian, a famous doctor in the Tang Dynasty, is a descendant of this party. His leading idea is to control diet, treat pain with diet, and prolong the life of the elderly. Diet should be clear, light, soft and simple, and avoid greasy and cold.