about 10% of the US is immigrant, that number is less than 0.1% in China.

dictatorship + failing economy + xenophobia + han-ethnocentrism goes brutally hard against immigration from other nationalities. immigrants would be beaten, harassed, and killed en mass in China.

Plus, Chinese really see everyone except Han as subhuman. White westerners for them, are a curiosity, sure every Chinese would be proud of hooking up with a white woman, but even those, they don't see as their equals. Everyone else, they take for pretty much human trash. It's hard to imagine anyone wanting to immigrate there. Plus, well, main reason for immigration is to give better future for your children. Vast majority of people have no hope of regulating their kids' future by bestowing them money, so they want to do it by giving them better level of rights. In this regard, China is worse than almost any large country in the world. I'd much rather go to Belarus (you need to keep your mouth shut, or nasty stuff happens to you, but man, the CHICKS!!!), than China.