The absolute numbers are irrelevant. It's almost bizarre to me that you don't see that. But even though I haven't experienced it myself, I do have plenty of anecdotal evidence against your statement, e.g. I watched serpentza's Youtube channel for a long time and heard many other first-hand accounts of people working in China. A colleague of mine is also working in China. Some have no troubles, others have to report to a police station every week for no reason. It's overall not good for immigrants in China, especially for black people. In any case, contrary to what you insinuated the duties for foreigners and how easy it is to live as an immigrant differ vastly from city to city.
Now even if I was completely wrong about this assessment (which I'm sure you think I am), it wouldn't make sense to presume that anyone would just take your word for it and allow themselves to be called pretentious when they disagree with you. That rude behavior is not increasing your credibility.