Feng shui belongs to roof killing.
Especially harmful.
Behind the house is a stab in the back, and the owner often has a villain to interfere. What's more, it is mentioned in the book that the front is a Ming Dao and the back is a dark bow and arrow.
As people say
An open knife is easy to hide.
The feng shui pattern that an arrow in the back is difficult to guard against.
So it is not good.