I would think they will become more productive. I love working hard but working hours have dependency when it comes to being unproductive.

That many hours is just hard work signaling or some kind of test of commitment.

Working that many hours is ultimately a cortisol problem that only less work can solve. This is obviously sub-optimal.

Anything China ever seems to do is rather smart and reasoned so I assume they have just figured out this makes no sense and will lead to an increase in productivity.