The corresponding characteristics of heaven and man. According to different people, different times, different places and different diseases, we should "eat according to the time and eat according to the syndrome differentiation";

It embodies the overall nutritional concept of harmonizing yin and yang with viscera;

It embodies the characteristics of combining comprehensive diet with careful diet. No partial eclipse, no overeating, different eating patterns for different people and patients, and dialectical eating for different physique, occupation, belief, illness, time and place.