According to the concept of modern health, life contains three dimensions, one is length, the other is abundance, and the third is freedom.

The so-called long, easy to understand, is longevity; Abundance refers to the richness of a person's spirit and soul, and the richer the better; The so-called freedom refers to the internationally accepted degree of self-care.

In this way, preserving life should include preserving the length, richness and freedom of life.

The maintenance of life span is health preservation, including nourishing the heart, body, spirit, nature, old-age care and self-cultivation; Maintaining the richness of life is to make one's spirit and soul interesting, which can be realized in a harmonious society through reading, art appreciation, open mind, attitude towards life and thinking about life. The maintenance of life freedom is to delay aging and show life freedom through nutrition, rehabilitation, exercise, health care and disease diagnosis and treatment.