> Without a massive amount of post-training,

I don't think so; ISTR some LoRA thing on hugging-face that easily overrode the Tiannamen Square related weights in a previous gen GLM.

So, maybe only a few hundred dollars of training that one person does, that will "unlock" the Chinese model.

> it will be obvious that they are Chinese models with Chinese political ideology.

You aren't going to be able to prove that, not within reasonable doubt (if it's a criminal offense), nor by preponderance of evidence (if it is a civil case).

You are looking at products wrapping the popular models (i.e. moonshot, z.ai, etc) - the wrapper is doing the heavy lifting of providing guardrails. Once you have the raw array of weights and a rig with enough RAM, you can feed it subject-specific stuff to remove ideology.