Those claims are put under scrutiny in the video I linked. I’ll have to read the article though, as I’m going off your comment.

It claims you can’t get blacklisted for not towing the party line. You can get blacklisted for not paying fines that you owe. To me, it sounds equivalent to being refused plane fair if you’ve got an unpaid traffic violation from a year ago.

The video even calls out a case where an MMA fighter was blacklisted after participating in Hong Kong protests. But claims the story is misrepresented, and the fighter was actually blacklisted for failure pay $60k after being found liable for defamation against another MMA fighter in a civil suit.