If you don't have citizenship, you're just an expensive guest worker who can get kicked out at any time.

(This is also true of Europeans in Dubai..)

Technically yes, but the ways US and China treat foreigners are at two extremes.

As long as you are invited and keep your mouth shut about ccp, China does not care about papers. One famous example is an athlete, when questioned about nationality after winning an Olympic gold medal for China, publicly claimed that I am Chinese when I am in China, and American when I am in the US.