Whilst I agree that in China a contract is not worth the paper it's written on, and that most Chinese employers are dishonest and should never be trusted, I have to disagree with some other points.

A degree is not needed to teach at the majority of schools in China, why some posters here continue to promote this myth is beyond me. What many FT's in China do is to get a job here first at a university or training centre, then they do freelance private tutoring work in their spare time, some teachers at uni's only work three or four days a week. There is no need to look for an agent or an employer in China if you want to do some private tutoring.