The Chinese government reserves the right to ban censor and shut down any form of online speech going on in the country.
In fact, they reserve the right to throw you in jail for doing it.
Where is ever an event or a situation or a topic of discussion which the state does not like they flip a couple of switches and all across the country firewalls begin blocking words, banning access to VPNs, and generally preventing those topics from being able to be discussed.
They believe this is good because it promotes social stability, when in reality it's just a massive system that empowers the government and ensures that the people can never easily disagree with it.
Anyone who supports such a system or a country who runs such a system should not be running and open source message board.