In Which I am Confused about my Identity

Normally, a white person in Tanzania is accompanied by shouts of "mzungu!" which means foreigner but has come to mean white person.  Actually it literally means person who walks around, because I guess that's what the first foreigner tourist types did, but it has come to be synonymous with white person.  Anyway, it's just nice to hear it, because it's less important for me to be greeted with politeness than to be reminded that my entire identity is summed up in one word describing my physical characteristics.  /sarcasm.  Recently, however, several people have begun yelling "mchina" (Chinese person) at me, which puzzles me greatly.  I have become so used to relying on people to describe my race in order to affirm my identity that now that people are switching racial terms I have now idea who or what I am anymore.