One ladder for two households, the door is facing the neighbor, how can the other party break the mirror on the door?
In fact, putting a mirror on the door is just to reflect away bad things, not to stay at home. It's just a door-to-door phenomenon Then he reflected the bad things to his door, and four people would feel bored. Even if they are not superstitious, they will be disturbed by his superstitious practices. In this case, I think it is useless for you to argue with him, because it is useless for a person to talk too much about his beliefs. Either you hang a mirror and let him find that you are also hanging a mirror, and he will be at a loss. In desperation, maybe he will withdraw from the mirror, or you can give yourself a psychological comfort. Anyway, you both have mirrors, and this bad luck won't go to either one.
In fact, this has happened in our family. It's just that our family is not so wicked. Our mirror reflects an irrelevant position, not someone else's door. This is also calculated by a neighbor who can tell our fortune. He said it would make our family's fortune and family's health better, and my mother believed him.
I don't think this thing is useful. If my neighbor does this, I may feel bored, too, because my temper is not particularly good, which will inevitably make people feel annoying, so I may argue with him, but I know that theory is not the best solution. Only hanging a mirror to comfort your experience is the best solution.