Does hanging a mirror really affect Feng Shui?

In the early days, people put mirrors at the door to ward off evil spirits, because mirrors are the simplest thing to ward off evil spirits at home. But later, people thought that hanging a mirror at the door was to prevent those "Sha Qi" from entering the room and make the indoor atmosphere more prosperous. But in Feng Shui, it is ok to put a mirror at the door, but there are many stresses, otherwise it may destroy Feng Shui and bring disaster. ?

"Shaqi" actually refers to an aura that is harmful to people's own yang, so most people are particularly afraid of it, so they will choose to avoid it. If infected, it may have a certain impact on people's wealth and health. These mirrors at the door are designed to ward off evil spirits, because they are reflective, so when they come to ward off evil spirits, they will be returned when they meet this mirror, so they can't enter the house, thus protecting their health and wealth.

But Feng Shui should pay attention to morality, harmony and mutual benefit. Never put a mirror on your front door to aim at your neighbor. I usually see some friends hanging a mirror in front of your house, or even a gossip mirror, and putting a pair of scissors on the gossip mirror to aim at your neighbor across the street. This is terrible.