At my last school there was a teacher, about the same age as you actually, who ended up so badly beaten up, that he lost one eye and will always walk with a limp, and now wears dentures, having pulled his natural ones with pliars.

Which doesn't make the behavior of these chinese to be any better than that of the teacher. You are right about the survival part though, the poster needs to take into account the fact that xenophobia is alive and well in China, and the locals don't like it when they see you dating one of "their" women. From my personal experience even Western citizens who are ethnically Chinese aren't given any exceptions. The ignorance of the culture is what makes the people dangerous.