No problem, glad to clear up the Green Card. I agree with your paragraph 1 and ignored 3 due to the racial stuff. I saw it as gratuitous and fits just about every country in the world. Seriously, if you really want to have discussions and debates, even strong ones, then consider ditching the cheap stuff. If not, I'll end my part of the dialogue.
I don't have recent PRC-specific immigration data in front of me, so I can't say for sure. But, my guess is there are more Chinese from the People's Republic that want to come to the US than those here that want to return, without giving up their US passports I mean.
What cheap stuff? Calling the US racist is cheap??? LOL If you can't go there then you can't have a meaningful discussion. American society, not so much the legal system, heavily favors white people. That's a fact. And I don't say that as a complaint because it's their country, not mine, and they can make the owners feel more at home, no problem. I want China to do the same and hey, China's racist too, but it's not racist against Chinese. That's the main point in attracting Chinese talent.
My guess is that you're right in that more Chinese want to come to the US than those who want to go back. And once again, it's because of any population, the vast majority of its people are useless, carried by the innovations of the few. This is not any kind of insult. Most people live their lives amounting to nothing. (Even highly accomplished people, doctors, lawyers most often amount to nothing and have no footprint other than their ephemeral services consumed by their paying customers.) In the US, if you amount to nothing, you can still have a lot of fun. In China, it's kinda hard to lift your head. But conversely, if you're a driver of innovation, if you have a creative mind that helps push the boundaries of known technology, then in the US, you might only be somewhat better than the guy who amounts to nothing. Part of that is because American society believes more heavily in equality (unions, blue collar workers wanting to make comfortable wages on 40 hour weeks while in China, all the children are taught that if you're not elite, you deserve nothing and your life is worthless) but often, another part of that is because you're just a non-white guy they want to use. In China, if you're Chinese and you drive innovation, they push you to the top of society where you belong. So as I said, for Chinese people, the cut-throat innovators have more to look forward to in China and those who didn't quite make the cut have a more materialistically appreciable life in the US.