Everything must be balanced between yin and yang to keep things in good condition. Excess of yin and decline of yang or excess of yang and decline of yin will cause things to change until they are transformed. People's physical condition also changes with the change of seasons, so we should change our diet with the change of seasons, especially pay attention to balancing the cold and heat of our diet. You can't blindly covet pleasure, cause partial eclipse, or even bury the root of the disease.