Many chinese will automatically believe that any expat who is working in china hasn't "made it" from their country and has gone there to eat out of the hands of the mighty. One solid word of advice for anyone who is there is to not be too nice when doing things like asking where something is in the supermarket or asking for directions somewhere. If you carry yourself like you hate everyone around you on some level, for some reason the courtesy comes to you more often. Acting all googly eyed at everything will net you nothing but abuse. You have to realize that if you're going to live in china then you are in a different country, and people react differently. Back home maybe others will reciprocate your demeanor and attitude in kind, but in some places the dynamics of communicating work upside down.