In geographical geomantic omen, how to determine the seventy-two dragons when going down the compass?

the sixth layer of the compass is the 72 dragons crossing mountains, and there are 12 types of mountains, each of which corresponds to 6 squares of 72 dragons crossing mountains. For example, Renzi corresponds to; Gui Chou, Zheng, Jia Zi, Bing Zi, Wu Zi, Geng Zi. In clockwise order: , positive, X, , X, X. Where stands for jewelry, Jilong. It stands for empty death, and X stands for fire pit error, both of which are fierce dragons. Yang Deyin replied.