This is not true. Both model and chat are censored; the resistance to answer some questions is baked into the weights. This is not specific to Chinese models though, Western ones are also censored, but in different topics.

Western model censorship example: https://www.reddit.com/r/Palestine/comments/13fz0i4/chatgpt_...

Depends on the model; Step 3.7 Flash is surprisingly happy to chat about Chinese banned topics for example when run locally