The so-called health preservation, in the final analysis, in the public's cognition, means good health, no illness and long life.

Then exercise is necessary. Exercise can accustom human cells to a normal metabolic state, which can not only discharge waste, but also provide energy and foundation for various functions of the body quickly.

It is also necessary to cultivate self-cultivation, because it is not only physical strength or physical fitness that affects people's metabolism, but also the influence of spiritual thoughts. People's mentality will also affect people's health, so self-cultivation is also indispensable as an aid.