What's feng shui about making mirrors?

Feng shui screen partition is used to block evil spirits, generally to prevent evil spirits from entering the house, so it is usually directly opposite the door, that is, when the house direction is consistent with the house direction, it is directly repaired outside the door, so that evil spirits are directly outside! Generally, in addition to melting evil spirits, it is also necessary to gather wealth, so there is usually a pool in front of this thing.