Trust, most of the smart Chinese" aren't emigrating, and Shenzen gives a good showing of just how rapid and powerful Chinese development can be. The more complacent the youth is, in regard to democracy, the more likely the government is to continue their development at a rapid pace. Plus they're exporting work to other developing regions, both in "Sub-Saharan Africa," and South America.
shenzhen was only able to develop because of investment from hong kong and taiwan. when hong kong and taiwan engineers went to shenzhen to build skyscrapers, factories, or machinery, they taught their chinese subordinates how to do everything as well.
my pops is a civil engineer and one of his coworkers, who was from hong kong, worked in shenzhen as a consultant for a state owned firm when the city was still in its early stages. he said that in the beginning, everything was a mess. there weren't really standard practises or rules or procedures. one of the head people my dad's coworker was working with had been a chemistry professor before being randomly assigned to be a construction engineer. but the hong kong/taiwanese engineers and bankers taught the chinese how to do things, so that within 10 years, the chinese were self sufficient and my dad's coworker couldn't find work in china anymore so he came over here
this is why i've been saying that if an african country wants to develop their own shenzhen, they need to harness the financial capital and technical knowledge of the diaspora. they also need to force the chinese who are coming over to build infrastructure to teach them how to do everything.
the mistake that idi amin made wasn't to kick out all the indians who had been dominating uganda's economy. his mistake was not forcing indians to teach ugandans the tools of the clothing, banking trades.
but to answer op's question, china in 50 years will be an american colony. most of the foreign direct investment flowing into china right now is from hong kong/taiwan/southeast asia. something like 60-70%. furthermore, china limits western/japanese investment in many ways. for example, a lot of key industries in china are protected from western/japanese investment. of course, western bourgeoisie don't like this at all. china is loosening the rules tho to make it easier for western/japanese companies to invest. two things can happen: they loosen the rules too much and the country becomes overwhelmed by western and japanese investment, essentially turning it into a colony of america. or china doesn't loosen the rules enough, causing america to fund a coup to overthrow the communists and install an american proxy government.