Apparently it's illegal and ByteDance (TikTok's parent company) stopped doing it.
https://en.wikipedia.org/wiki/996_working_hour_system#ByteDa...
I think you'd have to provide a lot more research to "996 (72hr weeks) apparently works in China". What type of companies, what type of jobs, ubiquity etc.
Re:Twitter’s mass layoffs have begun
by throw8383833jj on Friday November 04, 2022 @02:12PM
(#33471361)
China has a vast vast oversupply of software engineers.
In order to make 996 work in the US, there would need to be a pretty big oversupply of talent (and a lower standard of living) to make people desperate enough to give up their entire lives to their work. Unfortunately, I think we may be getting close to that about now or at least heading down that path.
And can Musk and others staff up in China (if US and Chinese politics/government allows it)?