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If you can't talk about it and don't communicate well, you can treat it the way of others, and build an identical one next to his house.
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If you can't communicate, then go to the court to sue and protect your legitimate rights and interests through the law.
The rural remedy is to hang a mirror in your living room and reflect it.
This is normal, and it may happen in the future.
It's not right for him to do this, and the upper space corresponding to the ground should also belong to your home. You can negotiate with him - you shouldn't let him do that.
Use a mouse sticker on the ceiling, once the rat is glued, it will squeak, you can get it out, this method sticks a few and it's fine, the rat won't be there, they are thieves.
The toilet facing the door is a feng shui saying, if you believe in feng shui, change it, don't believe it.