It is in China's self-interest for the era of imperialism, complete with its colonialism and neocolonialism, to come to an end. It turns out, that's also in the self-interest of literally everyone, even the imperialists. So the fact that this is in the interests of China is sort of a moot point.

That's like saying a doctor is only curing people of life threatening diseases so she can eat a decent meal and sleep in a comfortable bed. Uh, sure... I think we can all agree that whoever helps out should get a good life. What's the point of saying what you're saying, exactly?