In addition, there is a branch of the Book of Changes-the folk actual combat school; The main research is prediction (reading eight characters, divination). This aspect is very practical and can be applied in real life after learning. If you want a book in this field, you can go to the Four Pillars Prophecy written by Mr. Moya. When the actual combat school studies the Yijing to a certain extent, it can also understand the theory of the academic school.