Their solution to brain drain from foreign educated students in the 90s was in fact to send even more students to the States.

It’s actually worked very well for them as now they have a huge number coming back after studying abroad. And as our immigration policy becomes more restrictive, China will be getting even more of their best and brightest right back.

Punch `China exit ban` into your favorite search engine.

From a quick web search, these seem to be more about foreign nationals being detained in China for political reasons or to compel compliance. Not great, but also not really relevant to what I thought we were talking about (ie. Chinese businesses having to make concessions to the government in order to operate).

It's looking more and more like a "bug fixed" Soviet empire.

They (generally) don't think like that because they are taught an extreme sense of nationalism/collectivism.

Anyone with enough money to emigrate has a much stronger incentive to stay and play along with the system.