The funny thing is China isn't an imperialist country. They're primarily concerned with their internal affairs and with the rest of the world insofar as they need their raw materials and advanced technology. They're not very interested in leading and controlling the world like the west seems to be so obssessed with.
First of all, you seem to be ignoring China's wars with India and Vietnam, the Chinese attempt to overthrow the government of Malaysia, territorial claims to Taiwan (and a dozen smaller chunks of land), their continuing support of North Korea, as well as their explicit program of population dilution going on in Tibet and Xinjiang. Anyhow, imperial ambitions grow with capacity. For now, China asserts itself in its "ba…
-- http://www.guardian.co.uk/books/2010/nov/14/christopher-hitc...
It would be tragic if China were to actually become the dominant power in the world. But that's a long long way from where we are now. And I personally can't see any path from here to there.