2. The Classic of Mountains and Seas was written from the Warring States Period to the early Han Dynasty, and it was also called the three great ancient books together with the Book of Changes and Huangdi Neijing.
3. Shan Hai Jing contains many contents such as ancient geography, history, mythology, astronomy, animals, plants, medicine, religion, anthropology, ethnology, oceanography and history of science and technology. It is an encyclopedia of ancient social life.
4. The Classic of Mountains and Seas shows the ancient culture, records the living conditions and people's ideological activities in the desert period, outlines the ancient civilization and cultural state, and provides a lot of useful information for later generations.