Neighbors downstairs often play the piano in the middle of the night, which affects everyone's rest and leads to fruitless communication. Please help me find a way to cure him.

Stick a note on her door to show your wish, don't be too blunt, and sincerely discuss the time to play the piano with her, such as not playing after 9: 30 in the evening. If she ignores the voice, she will find the property (if the residential property is responsible) or knock on the door herself, but try not to quarrel when communicating. If it still doesn't work, you can dial 1 10 to adjust. If it still doesn't work, you can sue her, but you can make her pay for the interference.