Huangdi Neijing is a comprehensive medical work, which establishes the theories of Yin and Yang, five elements, pulse condition, Tibetan image, meridians, etiology, pathogenesis, symptoms, diagnosis, treatment, health preservation and luck. Its basic material comes from the long-term observation of life phenomena in ancient China, a lot of clinical practice and simple anatomical knowledge.
Huangdi Neijing laid the foundation of human physiology, pathology, diagnosis and treatment. It is a medical work with great influence in China and is called the medical ancestor.
Huangdi Neijing, referred to as Neijing for short, is the earliest existing monograph on medical theory in China and one of the four classic works of traditional medicine in China. It is the first masterpiece titled "Yellow Emperor", the ancestor of the Chinese nation. The title of the book first appeared in Han Shu Zhi Lue and Neijing, which quoted more than 20 kinds of ancient medical books, such as Shangjing, Xia Jing, Yidu and Qiheng. It can be seen that Neijing was written on the basis of other older medical documents.