I found this response from a Chinese Employer Website:

I am a black man who applied to teach in China, but I was never answered. Are Chinese people racist?

This is a sensitive subject. While our answer is "no", many schools have hired black teachers and instructors for summer camps, you must provide proof of your ability to speak well. Many Chinese people doubt your ability to speak proper, unaccented English if your origin is some place other than USA, Canada, England or Australia. Also, lack of a diploma may lead to doubts about your ability. Perhaps more so for minority applicants than Caucasian applicants, you must provide proof of your qualifications. But if you are determined and prove yourself to be experienced and have command of a standard accent, you should be accepted.