Kan, the meaning of mutation, represents the word "terrain"; Metaphor, "inheriting metaphor" means studying topography and landforms, focusing on describing landforms.

2. Astrology

Astrology plays a very important role in the history and culture of China. I ching said, "use astronomy to check the change of time."

3. The art of prediction

Divided into three mysteries: Qimen, Liu Ren and Taiyi.

4. Array method

In ancient China, soldiers paid special attention to the formation of troops, and the formation method could affect the combat effectiveness and cohesion of an army.

Step 5 forecast

Speaking of divination, I believe everyone's first reaction is fortune telling, but in fact divination is an ancient technology. The earliest witchcraft activities in China took two forms, one was divination and the other was divination.