[waterhouse23]

Yes, actually I'd like to better understand what China does do with their state control of social media.

Clearly you can explicitly suppress certain political views. But I think there's probably a lot more you could do. For example, down rank content that while not banned, is seen as undesirable.

Beyond that, I'm sure there are many other forms of social manipulation which a state which wishes to control their population could apply.

The way North Korea uses watermarking to track the progress of file distribution is kind of interesting. But nothing compared to the psychological manipulation you could do with a social network.

[gaius]

Two terms you should look up: "sesame credit" and "songbun".