From the perspective of geomantic omen, what's on the porch cabinet? What are the taboos?

In geomantic omen, it is very important to set a porch between the entrance door and the bathroom door to avoid opening the door to see the toilet. The porch can be made into a screen or a porch cabinet, and the height should be at least two-thirds of the height of the door. Buddha statues, flowers and lucky treasures can be placed on the porch, and you can open the door to see Buddha, treasure and smell incense. In addition, the left side of the entrance door is a wall, that is, the dragon hits the wall, and the man has no position at home, which is not conducive to his fortune. It is suggested to install a full-length mirror on the left wall. Also, the sofa in the living room is placed with a back door, so I feel insecure and guilty because I can't see the guests coming in.