Being a providor of Chinese liquor to your male minder when inviting him out for a good dinner can do no harm. If you're not too incompetant in the classroom, that can be overlooked, it seems. The degree for sale thing is an offer not worth taking up is what I say. There are many Chinese agents who specialise in finding jobs for unqualified foreigners. Actually, many employers prefer unqualified foreigners. They're happy to pay lower salaries to foreigners without degrees, and the agents can use their special relationship with the education cadres to get you that indispensable expert's certificate. The students at low schools and colleges are lazy and uninterested, as a rule. It's a win win situation for all at such institutions of learning. But you'll have to move on once you're contract is expired if you're a no good teacher, degree or not!