To put it simply, the yin house or yang house you choose must be backed by Xuanwu, that is, there is a backer. If you go deeper, you should look at the ins and outs of Zushan and Mother Mountain, as well as the acupoints.
Suzaku in front is the so-called trick, that is, a large flat open space, which can make people gather wind and gas. It also includes the situation of Daming Hall and Tang Xiaoming. There should be a barrier in the distance
Left Qinglong right white tiger, protected by the forest, so that the spirit of the famous hall will not run away.
In short, there should be a place where gas can be condensed, so that people can absorb gas and use it for themselves.
I hope it helps you.