Maybe this is a language issue or maybe you have a vendetta and are twisting things on purpose but to be clear and go from the start again.
You said Chinese people work 16 hours a day (implying this is normal)
This is not true
You then said it was 12 hours
Again this is not true
While some people definitely do it is not an accurate representation to say "Chinese people work 12 hours a day" as 90+% work between 6 and 10 hours.
In the USSR even if technically not allowed some workers definitely worked 11+ hours be it to account for the extra labour necessary for rural upkeep or due to uneven enforcement.
Would it then be fair to say soviet workers worked 11+ hours? Obviously not. Do you understand what I'm trying to say now?
If not I am sorry but my English is not good enough to explain this better.