The other party's behavior has constituted infringement. In addition to calling the police, it can be solved through judicial channels.

1. If the other party's mahjong hall is operated externally, you can try to find out whether it is legally operated by the industrial and commercial bureau first. 2. If the other party is legally engaged. You should collect evidence for subsequent mediation and litigation. For the behavior of the other party disturbing the people at night, you can record, take photos or video during the period of disturbing your rest. It is better to have a recording of your communication, which proves that the other party disturbed the rest of the neighbors at night.

It is suggested that you communicate with the other party (landlord) through the community during the day and negotiate a solution (you can make a transcript or record the negotiation process). If negotiation fails, you can go to court.

I hope it helps you.