Yang Zhenning restored China nationality. How difficult is it for other foreigners to get green cards in China?

Yang Zhenning was originally from China, because doing some highly confidential scientific research in the United States must be operated by Americans. Qian Xuesen returned to China with him, but Yang thought that the scientific research conditions in the United States were good at that time. Now he wants to come back and understand that he is from China and should come back to make contributions to the country.

It is actually quite difficult for foreigners to get a green card in China. China's immigration policy is also biased towards economic or skilled migration or international marriage. Because China has a large population, it is difficult for foreigners who have not made certain contributions to the country to get green cards.