回複：ask for advice: what I should do?

Your managers case with chinese in another company sounds familiar. I heard similar case in other companies between employee and manager even both are americans. It is the problem of your manager. Unfortunately, he thinks only chinese will do such thing. However, the person I knew tried to manage the situation because he doesn't want to lose his job. He did as the manager asked him first and it does not turned out right. Then, he tried to fix it by his way, which is the right way.
You will always find people like that, here or there. It doesn't mean you can avoid it in another company. You need figure out how to work with this guy in his way if you don't want to lose your job. Otherwise, you'd better find another job.