Zuo Dan's geomantic omen is generally prosperous, but it is not absolute. If there is water shining on the left chest, it is also prosperous. In addition, pay attention to gossip. I have seen a man who faces east and left, facing the mountain and the distance, with a long flat room and two rich rooms. Because of his strength, Kanggua belongs to middle-aged people.
There should be a left Qinglong and a right white tiger on the cave floor. If the terrain is only Qinglongsha, it is called Zuodanti. If there is only white tiger sand, it is called right single mention.