And yes, they are repressing dissent within China through "violent physical force". That again isn't unusual. There's a broad consensus that a state has internal monopoly on force.
Me, I hate that. But it's not as if China is alone, in that. I'd love to go buy some LSD or shrooms. But authorities put people in jail for that shit. Some huge percentage of US citizens are locked up for nonviolent drug offenses. How is that not just as bad as what China is doing?
Edit: And what if some were organizing a UN conference to discuss the violent repression of recreational drug use in the US etc? That's not even a credible possibility, is it? And that's largely because the US has so thoroughly dominated the world regarding the issue.