Does anyone really believe that Bitcoin has disappeared from China? The answer is no, in fact, it continues to be mined, and that brings us to the next question. Do these mining farms have permission from the Chinese government to mine?. Probably yes. So who stores the mined Bitcoins?...
China is complicated, it's not so easy to get and it's not that much conspiracy territory anyhow.
You're allowed in China to do a lot of things that are bad, like sewer oil, tofu construction, and almost slave labor, but you have to keep a low profile, and nobody will deal with you until it either comes to the attention fo the public or the government thinks it's a problem.
Mining was banned in China because it posed a problem for the Northern Mongolian grid, it was a shitton of coal power mining being done outside the monsoon season, so they saw a problem, saw that the government isn't earning a penny, and they went after the big guys with millions of kwh consumption. Nobody hunted the mining farms, they don't care about them but try to push the limits and you're going to get in trouble.
While this might work for mining, no, Bitcoin usage is dead, that's a red line nobody wants to cross.
Bitdeer and Bitmain moving to the US and increasing their capacity there is proof there is no turning back for China to allow huge mining projects anytime soon.