Chinese tech companies' 996 policies, and large Chinese tech companies in general, are newer than that ethic in the US. What I hear about 995.5 (every other Saturday off) from my friend at Xiaohongshu in Beijing sounds remarkably consistent with what I heard from my Google friends 20-25 years ago, from working hours to on-site amenities that kept you at work. You're spotting a correlation, but I think causality probably goes in the US -> China direction on this.

In the early to mid 90s, I worked at a Silicon Valley based software startup. We had something called "The Century Club". You made the club if you'd done 3 consecutive months in the last year without working less than 100 hours in any week of those months (averaging 100 hours was not good enough). More engineers were in the club than not. We were told that making the club was not mandatory, but nobody in the club was ever fired and most not in the club were eventually fired.

The next startup I was at had a similar culture without the cute name. I remember my most exhausting stretch there was coming in on a Saturday morning, for a database migration that had to happen outside business hours, and working straight through without sleep (other than nodding off at the keyboard) until Monday afternoon. Our CEO was kind enough to bring us food. Even in regular times there, I would go exercise from 10-11 PM, and more often than not I'd go back to the office after.

A decade later I was at Amazon. Our entire group of ~100 engineers was required by our VP to work weekends, in the office, for months at a time when approaching ship dates. The VP would send an email every Friday during this period to remind us to be there. Of course he wasn't there.

Those were all pretty counterproductive, but didn't seem that unusual. The difference in the US back then was that even asking about such things during an interview would often result in no offer because the candidate didn't have a "good" work ethic. Things have gotten a lot better in the US in the last 10-15 years, but a lot of that came from competition for talent. The more that competition eases, the more likely it is that we'll go backwards on this.

Relating back to the article... For the last 3 years of my career (I retired a few years ago), I worked 4-day weeks, and it was all remote. This is just as anecdotal as the article, but I felt I got far more done, with higher quality, than at any point in my career. It was such a revelation.