All this is related to the connection between the Zhang family, where Menyouping is located, and an unknown civilization. That civilization once prospered in the Tang Dynasty, but soon disappeared. Now people can only experience that unknown past from the "Book of Mountains and Seas".
It can be said that this civilization has exceeded our understanding of the world living in three- and four-dimensional spaces. Therefore, I want to record it so that future generations can slowly savor and commemorate this glory that has been buried in the dust of history.
That's all. By Wu Xie