Wan Mizhai put forward the "Four Essentials of Health Preservation" with "less desire, careful movement, timeliness and avoiding diseases" as the soul, studied the law of human life, and expounded the aging factors, which are concrete measures to improve health and prolong life. The theory of "Four Essentials of Health Preservation" is hundreds of years earlier than the concept of health preservation advocated by the World Health Organization, even more comprehensive, advanced and scientific, and still has practical significance in today's society. He lived to the age of 83, which was really a long life. He was praised by experts as "the first person in China in recent 500 years".
It is reported that Wan Mizhai's works are rich, with *** 10/08 volumes, and his Encyclopedia of Wan Mizhai Medicine is of great reference value to the study of modern clinical medicine, including Treatise on Febrile Diseases, health care and eugenics. It has been published frequently since Ming and Qing Dynasties, and many versions have been introduced to Japan, Korea, Vietnam and other countries.