Creation year: pre-Qin to Han? The so-called "medical classics" are books that explain medical theories such as human physiology, pathology, diagnosis, treatment and prevention. It is called "Beijing" because of its importance. The ancients called important books that had certain rules and generally had to be studied "classics", such as the Six Confucian Classics, Laozi's Tao Te Ching, and the simple three-character classics.
The reason why it is called "Neijing" is not that "Yin and Yang of the five internal organs are called" internal "in Wu Kun's Su Wen Zhu and Wang Jiu's Neijing Jing Lun He", nor that "the internal is the way to deal with the world" in Zhang Jiebin's Jing Lei, but just opposite to "external".
This is similar to Hanshu, Hanshu, Chunqiu, Chunqiu, Zhuangzi's Inner Chapter, Han Feizi's Hidden Inside, and Waizang, except that Huangdi Waijing and Bai's classics have been lost.
The extended material Huangdi Neijing established the theories of Yin and Yang, Five Elements, Pulse, Zangxiang, Meridian, Etiology and Pathogenesis, Symptoms, Diagnosis, Treatment, Health Preservation and Luck.
Discussing medicine in a holistic view presents a "holistic medical model" of nature, biology, psychology and society (according to the research of modern scholars, it is considered that the traces of Huang family in this edition are invaded by Taoist priests in Sui and Tang Dynasties). 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.
References:
Baidu encyclopedia-Huangdi Neijing