I've traveled to countries for weeks, even months in total, then moved there, before the real issues of said country / culture / society become properly apparent and people open up about things. I'm not saying it was bad, but it takes a bit of time to read a place. Imagine that in a place where saying the wrong thing can have you landed in prison.

I've actually worked with some Chinese for years and it wasn't until I went out on a dinner that some really ugly stuff about why Han people in the past have been treated badly and that being the justification for the treatment of Uighur people, then I listened to an hour about why Muslim people are a problem and all the horror stories they'd read about them in the paper (it was clearly propaganda). Scarier for me one of their best friends at the time, who just missed the dinner, was Muslim. That wouldn't be an isolated case I'm sure.

This is not to single out Chinese by the way, I'm just reinforcing my point that it seems naive to just say, "I stopped by, looked pretty good, I'd go back, seems like a good place."