While I'm not Chinese, I've read that there have been instances, both modern and historical, of definite racism in China.
That all being said, while racism is always a horrible issue, I don't think China's issues of racism are NEARLY to the same extent or intensity as in the west.
While I'm sure that I'm generalizing, its truly remarkable how surprisingly multicultural that China is.
It seems like that Chinese people/citizens don't care where people come from (not in a malicious or arrogant way, I mean), they primarily care about who you are as a person and what your role in society is, which matters far more.
Also, I thought that China recognized roughly 57 different groups? But that might just be main ethnic groups, and I'm not doubting that there are 37 or more different minority groups, now that I think about it.