US puppets, that's what's happening
One of the things that has made social media so popular is that every user can independently operate social media accounts and become so-called self-media, which was unimaginable when large media organizations had control of the information channels. And in the social media age although people's points of view might not be popular, their right to air them is protected and respected, as long as they are not harmful to others or society as a whole.
At least that is what you might think. But even in the self-media age, the platforms are still controlled by big organizations, and it seems that you had better shut up if your views are not to their liking. Although they claim to have difficulty shutting down illegal violence inciting race-hate posts, Twitter and Facebook have had no difficulty shutting down some accounts they claim are spreading disinformation about the "protests" in Hong Kong, claiming these accounts are tied to the Chinese government.
Without providing any tangible evidence, the two companies assert the Chinese government is behind the fake accounts. If accounts expressing views similar to those of a government are to be regarded as being paid by the government, then the US government is surely their largest sponsor of fake accounts. Their claim is ludicrous and irresponsible.