As China attracts immigrants from all over the world the system of rigid social control will be tested. Immigrants will want to practice their own customs and that may lead them to resist direction from the state. This in turn could encourage Chinese minority groups to revive their individuality even in defiance of prescription from the government. It will be a positive development for the world and for China, but it will require some adjustment of social protocols and customs in China.
At the same time Chinese will travel abroad, and when they return home they will bring new customs and new opinions that could contradict some of the existing ways. This too will disrupt the social framework in China. All in all being the top economic power will have its challenges for China.