1. The nozzle is naturally generated and cannot be repaired. 2. There is a discussion about "pumping water to Hall Zero" at the rainwater outlet of the compound. In fact, it should be above the mountain terrain, and you can't put down the water or slip it. The water above has feng shui advantages of gathering water, circling water and turning water. The whole house should be well planned. As long as there is a water outlet, water can't be released, let alone released into the wild. 3. Gate: First, it should be opened on the mountain terrain. Second, it is convenient to enter and exit. Third, don't go out and go downhill. Comprehensive consideration of the three.