At the gate of Renshan Mountain, put the water of Yangzhai in the third direction-there is a "water into the zero hall to release water". There is a "reservoir tomb drainage method", which is to put water back into the reservoir. I prefer the "drainage method against the current" in which rainwater flows around the house. A drop against the current is worth thousands of pounds. It is easier to master, water should go to the canal, and it is opposed to letting wild water and scattering water. The so-called reverse drainage method is actually to discharge water to the running water on the surrounding mountains, let the rainwater flow around the house, then discharge it, and then flow out from around the house.