Why did people hang mirrors on their doors before?

Hanging a mirror on the door can really ward off evil spirits, which is not good for neighbors, but it will also hurt yourself, because all kinds of airflow will enter through the door, including wealth. Once you hang the mirror, it will also prevent the fortune from entering, which in turn is not good for yourself.

Feng shui pays attention to covering, blocking, melting, fighting and avoiding; In fact, if your surroundings are good, the mirror in your neighbor's house can bring you good feng shui. If it's bad, it's the same. You can raise two pots of green plants on the windowsill of the bedroom, or stick reflective cellophane on the glass of the window. To make matters worse, put a gossip convex mirror, but it is not good to be seen by neighbors.