They have been catching up pretty fast though. Since US have banned Nvidia chips export upto a certain extent to them they are coming up with more optimized training at least which is why US should be wary of them. China does more with less
What doesn't kill you really does make you stronger.
For American and other non-PRC companies thinking of using Chinese models, doesn't this have to be balanced with the risk that the US or its leadership may kneecap the Chinese models through export controls, an executive order, or some other means?
They use H800 as opposed to major US ones on H100 (2-3x faster)