It's interesting how wide the cultural gap is here. China has a very long history of apprentices emulating master artisans, closely duplicating their designs. It is a very natural, comfortable progression for them to use the work of others as a springboard. But in the West this seems odious to us as it reeks of the exploitation of someone else's work. As a Westerner I'm firmly in the latter camp, and learned at an early age that much is lost in the learning process when one simply copies work off a classmate's paper. However, I think one can at least recognize that the Chinese culture simply has a different approach to this. Ultimately, I think it is at their peril (in many ways). But this behavior is not really as sinister as it might seem to us looking on from the West.