When I lived it HK I noticed it was generally very easy to tell locals from mainland Chinese from ABCs from internationally-schooled locals. I think I've notice

When I lived it HK I noticed it was generally very easy to tell locals from mainland Chinese from ABCs from internationally-schooled locals. I think I've noticed the same thing with people of African descent - however, in both cases I thought it was more to do with subtle differences in mannerisms and dress than in the way they actually look.