Simple Feng Shui clearance question: Why do you sit in a tomb facing south, turn left and right, and turn left and right will be prosperous?

Simple Feng Shui clearance question: Why do you sit in a tomb facing south, turn left and right, and turn left and right will be prosperous? For example, the direction of Renshan C, Zishan Noon, Guishan Ding, Genlong left the water to pour into Kunming, and the right water to pour into Chen. Why are they all prosperous times? The dragon pours water from left to right, leaving Kun-the water will come out but not from the right, to ward off evil spirits and seek good luck.