Works on inner alchemy and health care. The representative work of Wang Dongting, a medical scientist in the Qing Dynasty, "The Essentials of Life and Life" is divided into four parts: the life and life chapter, the addendum, the evil spirits chapter, and the Tai Chi illustrations and notes. It covers the basic theory of traditional Chinese medicine, syndrome differentiation and treatment, prescriptions, acupuncture, etc. The author systematically summarizes the knowledge in the medical field at that time in clear and concise language, provides readers with valuable medical guidance, and plays a positive role in increasing people's health awareness and promoting medical progress.