China Naming Network - Ziwei knowledge - How many drainage holes should be drilled in the fence of 400 Pingyuan Dam?
How many drainage holes should be drilled in the fence of 400 Pingyuan Dam?
At least two.
A 400-square yard can leave more drainage ditches according to its own needs to facilitate later drainage.
The hall of traditional houses will be designed as "four waters return to the hall", that is, rainwater drainage will not affect Feng Shui. At least two drainage pipes are needed. The drainage pipe in the yard will not affect Feng Shui.