Why do Chinese need to break into Hollywood? America is a European dominated country, and the movies must reflect that. I personally don't like to watch an Asian James Bond, like James Wong? Hell no, Danial Craig is awesome.
On the financial scale, top Chinese actor Huang Xiaoming, also one of my fav, earned a reported 75 million last year, and he ears around 30-80 million a year just in China. Obviously that's one guy, but the money is good in China.
The only other reason is global notoriety, but that's difficult even for Americans. Most Chinese, even my English speaking cousin, has no idea who 99% of the actors or actresses are, and don't want to know.