That would be quite the change, considering they don't really allow any outsiders to become citizens.

I do wonder about this. With demographic collapse coming for almost all nations, or with a notable trend line for it to come, what would happen if other nations basically prevent emigration? Better to keep their people than lose them. Alternatively, those with large populations can use this as a bargaining chip in trade negotiations.

The coming decades will be interesting.

This has yet to happen in East Asia and probably never will.

America and countries that engaged in worldwide colonisation are the exception not the rule.

I don’t think so. They have a massive working population and foreign entrepreneurship is hard there. Also they have no process of assimilation and are pretty openly hostile to outsiders. If anything you might see low skilled immigrant labor moving there but I don’t think there’s going to be large numbers of high skilled workers moving there.

I doubt it because the Chinese are very protective of their homogeneity and see what has happened in Europe as a massive cautionary tale. So my guess is that they will be very picky and control both quality and numbers tightly.