Are you implicitly arguing that derivative art isn't a thing?

Chinese and Western models on IP are completely different. In our system, the inventor of a Thing gets a period of exclusive rights and everyone who wants to build off of that Thing has to pay license fees to cover the expenses of the original inventor.

In China, copying a Thing is seen completely different (well, at least as far as I know, so take it with a bit of a grain of salt) - an appreciation that the original inventor of the Thing did something good. Getting copied is a symbol of honor.

Both worldviews are completely valid, but it's obvious IMHO that these two views cannot coexist in one single global capitalist economy framework.

I meant more with the timing thing. If a workalike drug undermines the argument for long drug copyright, what are the implications of a copycat plot?