I have had such an experience. I was in Suzhou, and I was in a private school. The head teacher's salary is 700, the teacher's salary is only 500, and only 300 is paid every month. I took some teachers to ask for a raise, and the boss threatened that she knew someone.

I was very angry at that time, so I took the whole school teacher to class the next day. I made her miserable that time, and I didn't see how many heads she had. However, I don't recommend this. The big deal is to take the salary and leave. Such a boss will eventually stumble. Ignore him.