I don’t know but I and my friends still visit China regularly, but not the US anymore, because we have no clue what’s the expectation there to not be in a jail for weeks. I have quite clear idea what the expectation in China, but not the US. Maybe there is something to it.

China is great for visitors, especially lighter skinned visitors. You probably won’t go to jail in China unless you have a thing for drinking a lot in Chinese bars, even then you will probably be ok as long as you don’t pick any fights.

Illegal immigration really isn’t a thing in China beyond a few North Koreans in Dongbei and a few Laotians in Yunnan. So they just won’t assume you are an illegal immigrant.

I know that China is an authoritarian near-dictatorial country that oppresses minorities and commits cultural genocide. And I am not an American.

That does not seem to be all that related to the original post I was answering to. An average person / citizen / visitor has way less to worry about around (trained) Chinese police than they have to worry about around an (gangster) American ICE agent.

You should also know that China doesn't have as much rule of law as America and indeed average people have a lot to worry about around the police, and generally are very careful not to do things that will get them beaten up. But it happens nontheless - violent assaults on street sellers by police, for instance. In China, people are actually scared of the police because the policemen have so much arbitrary power. They're not strictly and fairly enforcing the law at all.