How to measure 72 dragons crossing the mountain and 60 dragons crossing the ground?

Seventy-two dragons crossing the mountain are measured with a compass on the water dividing ridge behind the main star or at the inlet and outlet of air and throat. It seems that the dragon belongs to any of the 72 dragons, and it will decide whether it is good or bad. If there are Bingzi, Wuzi and Gengzi dragons under Zilong, Bingzi Shuilong and Gengzi Tulong can be regarded as Jilong, but Wuzi Fire Dragon can't. The goal is to find the angry dragon.

However, the 60-year-old dragon that penetrates the ground is eight feet behind the cave (about two meters, five or six), and generally has thin-line veins. Use sixty dragons to penetrate the site, and take the ten-day pulse of Bingzi and the ten-day pulse of Gengzi. For example, there are Jiazi, Bingzi, Wuzi, Gengzi and Wuzilong under the second mountain of Renzi, and only two dragons, Bingzi and Gengzi, are taken. That is to say, as long as the thin thread of the small vein falls on the ball or the boxer, if it falls on other squares, it cannot be used. It's not an angry dragon. That's what "angry burial" means.