Huangdi Neijing is divided into Lingshu and Suwen. Huangdi Neijing is one of the four classic works of traditional Chinese medicine, and it is a medical masterpiece that studies human physiology, pathology, diagnosis, treatment principles and pharmacology.
Theoretically, the theories of yin and yang, five elements, pulse condition, Tibetan image, meridians, etiology and pathogenesis, symptoms, diagnosis, treatment, health preservation and luck are established. Its basic material comes from the long-term observation of life phenomena in ancient China, a lot of clinical practice and simple anatomical knowledge.