What's Tai Chi Eight Diagrams for?

It is used to explain the origin of the universe and its evolution mode intuitively, which belongs to the category of philosophy. But then it was deified and used to pretend to be mysterious! If you are in the mood, you can look at the Tao Te Ching, the Book of Changes, Tai Chi illustrations and so on. Originally, most people in ancient times used military tactics, fearing that others would learn to talk nonsense, and later people just let it go!