what culture?

Does an artist need to speak his "own culture"? He might speak his "own language", but what is his "own culture"? When we define a person's identity, we should think about "becoming" rather than "being" (if the person is still alive), because we are far from one thing(one culture) only. Or we can forget the term of "idnetity" at all, because we only think ourselves are different but see all others as a "whole". In the essay Fisher made comments on  the internationalism and multiculturalism. I agree the cultural symbol is "pure", but is there still any "pure" culture exist in this world? 

The essay also mentioned about the "cultural sign" and some artists who deal with "cultural sign"s. I believe a cultural symbol or "sign" is presenting "truth", with original meaning, and it is "pure". Ai Weiwei is one of these who successfully uses cultural symbols. This is his "Coca-Cola Vase". The vase is from Tang Dynasty (618-907) and paint.