Despite being an extremely diverse country, nobody is going to try to tell you that China has magically solved racism, they haven't. You hear stories like that horrible washing machine ad that went out, but the government also cracks down on things like that. I feel like there is a lot ignorance-based racism as opposed to malice-based racism. Still an issue, but people are usually more willing to change in the former case.

I have black friends that left the US to live in China and I can say that they definitely feel safer. To be totally fair, that's just a few anecdotes and not a wide study or anything like that. I don't think that is exclusive to China though either, I have heard nearly the exact same things from people who have come from the US to my country.