What is the root of health preservation? Virtue requires effort and dedication to the path; Virtue residing in the heart and manifested externally is called "virtue appearance", for example, walking, conduct... all these can show a person's "virtue appearance". Therefore, virtue is also self-education, the organization of the inner mind, and the manifestation of external behavior. In terms of moral cultivation, health, and health preservation, many thinkers and health preservation experts in our country's history have placed the cultivation of nature and virtue in an important position in health preservation, even regarding it as the "root of health preservation".