Huangdi Neijing is one of the earliest extant health preserving monographs. Huangdi Neijing is one of the ancient medical classics in China, which was written between the 2nd century BC and the 2nd century AD. The book tells the knowledge of human body structure, physiological function, causes and treatment of diseases, and puts forward health-preserving concepts such as "preventing diseases" and "preventing diseases", which is regarded as one of the important foundations of health-preserving in traditional Chinese medicine.