(disclaimer: I'm a white Jew who has never been to China, so this is all secondhand, my reporting of one friend's experiences in one small part of China.) A friend of mine who is a black man who has been living in mainland China for years has encountered a lot of racism, of a different sort from what he encountered in United States. And my understanding from him is that it is a mix of pre-existing valuation of pale skin combined with stereotypes about black men from American movies.