Health preservation refers to a medical activity that supports life, strengthens physique and prevents diseases through various methods, so as to achieve longevity. The so-called life is life, survival and growth; The so-called maintenance means maintenance, recuperation and nourishing. At present, most people are in sub-health state and seldom take care of their physical condition. It is suggested that friends take more steps 100 after work, stretch more, breathe more, eat lightly and so on.