Naive western question here. You see headlines about this type of person quietly dissapearing. But it's not clear to me how real or common that is. Is this guy likely to end up incarcerated for this kind of post?
He didn't attend the protests except to spectate, and he writes in English.
I'm not sure that he's a Chinese citizen. Far easier to deny a new visa if they don't like him.
The people who get disappeared are people who organize protests or try to sue the government. Not people who just attend protests. People who distribute VPNs, not mere users of VPNs. And ethnic minorities.