No offense but most of the White teachers I've worked with were only self serving types, not the types who would actually take action and help you. Maybe ESL teaching isn't the best option for foreign people of Asian descent in China?

You've spotted a very important culture difference.White FT's here tend to be very selfish people.They're just out for themselves.In contrast,Chinese who go abroad to work usually unite there.
Unfortunately for you,you've ended up at a disreputable training center on account of your Asian looks.I can understand why you co-operated with your Chinese boss.I'd have thought you'd have got better treatment,but you didn't.You were treated badly,just like the other Chinese employees working for him.
I'd advise you to contact a good agent.At least you'll be teaching in one school,a public senior middle school,no problem.Contrary to what's stated on here,not all agents are bottom-feeders.That said,please note that not all training centers are the pits either.But I suspect it's much easier to find a good agent than a good training center or a good private school.I'll give Turnoi the relevant details re reputable agents.He can pass them on to you.Don't throw in the towel yet.All may not be lost.
By the way,the same kind of discrimination as above also occurs in South Korea - I've read about that on 'the greasy spoon'.So,it's not just a Chinese phenomenon.I wonder if it's a Japanese one as well.I'd expect so!