Huangdi Neijing, which is divided into Lingshu and Suwen, is one of the earliest ancient books in China and a summary of the working people's long-term experience in fighting diseases. The book was not written in a moment, and the author was not alone. Originated from Xuanyuan Huangdi, passed down from generation to generation, supplemented and developed by physicians and medical theorists. It is generally believed that the book was written in the Spring and Autumn Period and the Warring States Period. While expounding the pathogenesis and pathology in the form of dialogue between Huangdi, Qi Bo and Lei Gong, he advocated that the disease cannot be cured, but not cured, and at the same time advocated health preservation, life preservation, longevity and longevity. It is one of the four classic works of Chinese Han traditional medicine (Huangdi Neijing, Difficult Classic, Treatise on Febrile Diseases, Shennong Herbal Classic), and it is also the earliest existing medical classic in China medical treasure house. It is a medical masterpiece that studies human physiology, pathology, diagnostics, therapeutic principles and pharmacology. Theoretically, the theory of Yin-Yang and Five Elements, the theory of pulse condition and the theory of zang-xiang in TCM are established.

This was more than two thousand years ago.