Wouldn't matter if they paid you on time or you yourself got the high life on 4000 rmb, wouldn't matter if it was 40,000 rmb or 4,000 dollars. One call to the PSB and you're toast if you're on the wrong visa.

This is a true statement, but can you explain your reason for bringing it up in regards to this conversation. I had to go through the whole process of getting a legitimate work permit in order to work at Dell English School and I am not aware of any of the other foreign teachers having the "wrong visa".

I am fine with you giving advice to people on finding a good school. But if you are bringing up false claims, then I do wonder what your reason for this is?