Discrimination in China.
There is a demand for foreign teachers in China and so many positions go unfilled. There is an abundance of non native teachers who would be happy to take those offers but schools refuse them. If a small privately owned English centre is looking to hire teachers then they will only offer Caucasians. this is because the parents will pull out their child if this school has a non Caucasian teacher.
The season of "The apprentice" that has an African American hired is an example of the mentality difference between western and Chinese views. Trump hires someone because they can do the job but if it were a Chinese business man he would have rather chosen the idiot white guy who couldn't string a coherent sentence together. How that guy actually made any money is beyond me. Secretaries are employed to be a flower not an essential tool, managers are hired because of connections not experience.
Because white people are known to speak English therefore only they can teach English. What doesn't help is Hollywood, the gangsta image of African Americans gives ignorant parents the stigma. One parent said that all black people in America are beggars which really shocked me because the last time I went to America there were lots of white beggars asking for $50.
 
Places like Japan and Korea won't hire any non natives and one teacher who worked in Korea said that there are a lot of ex-cons who gained a degree in prison working in Korea. They can't get a job in England and Koreans only want white faces so that is what they get.
If planning to come to China to work and you're not a native speaker or not Caucasian never apply to training centres. Any school that is all about business than education won't care if you're the world's greatest teacher. It's all about the face than the brain but if you apply to colleges there is a better chance. Colleges don't have to deal with parents, the students are miles away from home and there is no threat of parents pulling out their kids. A lot of the young teachers are lured by the higher salaries by the centres but many other teachers won't deal with spoilt brats. Colleges are now popping up in "educational zones" and not ideal for the newbie teacher looking to go clubbing.
Schools have dealt with some undesirable teachers and someone who comes to class keeps the students happy is what they really prefer. If you go and read the school reviews most of them are the training centres and less colleges.