It's a little too later for export controls. Chinese models have made massive gains through legitimate research but also being trained on billions of tokens from Claude/GPT. The politicians have no idea how to stop that from happening so they pull the only lever they know.

Also, don't forget that we're only here because the clown-in-chief cut them off from GPUs - forcing them to make do with inferior hardware (and hence superior ideas). I have no doubt that any controls would only make China stronger.