Excuse me, which books are called the three ancient metaphysics?

There were three great metaphysics in ancient China: Huangdi Neijing, Yijing and Shanhaijing. The so-called three mysteries

A book is impossible with the knowledge, skills and tools at that time, but I don't know how to write it.

Huangdi Neijing is the foundation of Chinese medicine, and it is still brilliant today. The Book of Changes has made Feng Shui, and the classic of mountains and seas is at the beginning.

In the absence of satellites and modern surveying and mapping tools, the vast territory has been basically and accurately described.

In addition, there are three great metaphysics in ancient China: one is the theory of traditional Chinese medicine written in Huangdi Neijing, and the other is the wind described in Yijing.

Water, the third one seems to be something related to fortune telling, I forgot. Anyway, after the founding of New China, it can be justified.

Only Chinese medicine has developed, and others have been obliterated as feudal superstitions.