I have never been to China, but you sound informed on the topic - maybe you can weight in on that.
I've heard from various YouTube channels covering news about China, it's social issues and shenanigans that all companies above a certain size are required to have someone on staff that's essentially part of the government. These channels are however mostly run by people speaking very good English, so clearly made for the western market.
But Googling that information seems to confirm it, too. I.e.
> Since 2018, domestically-listed companies are required to establish a party entity.
I cannot speak with confidence on the topic, but from an uninformed spectators perspective, it does sound like timewizards argument was correct?