"Oh my Mao! This guy is trying to make a decent living and does not want to be a slave to some crooky employer who will withhold his salary and breach his contract in a lawful fashion! What a horrible crime! This must be dealt with immediately!"

Chills mate, I believe that China has much more immediate issues to be dealt with. You know, things like corrupt scums embezzling millions or young people getting terrible ideas such as democracy and freedom.

What do they care about some noname laowai trying to make ends meet. The half dozen raids (in a country with hundred of thousands educational institutions) each year are just a way to remind us to stay in line and not to make any trouble. How you get your money is of little concern to them.