It is almost certain that the CCP will impose constraints on access to their models at some point too. But Trump is doing it to extort cash from Anthropic, and China will be doing it to leverage political and economic concessions.
Remember that there are degrees of banning. Slower tokens, dumber models, token caps, KYC for each model consumer, hurting specific companies that are not capitulating in a deal with a Chinese company, etc.
A big difference with open models is that anybody can run and tune them any way they like. The real difference in philosophy is that Americans companies treat the model as the product, while Chinese companies see models at infrastructure you build products on top of. You amortize the cost of deploying it at scale by sharing knowledge and iterating quickly to bring the cost down.
I see absolutely no reason why CPC would choose to kneecap themselves the way the USG just did. Keeping open access to the models means that the whole world will be using Chinese based AI stack going forward. Only a government run by absolute imbeciles would do what the US did.
Even if everyone uses Chinese open weight models at somw point, how do you make money creating them?
This is just typical Chinese behavior. Flood the market with cheap or free stuff and wait for your competitors to die off. Then you have a monopoly. (Maybe you were implying that would happen, dunno)