The latest conditions for American postdoctoral applicants to apply for green cards.

After obtaining permanent residency, he has lived in the United States for five consecutive years. A green card, that is, a permanent residence permit for foreigners, is a permanent residence permit for foreign citizens. The immigration policy of foreign doctoral students in the United States is to live in the United States for five years after obtaining permanent residency, which is the minimum residence period for naturalization. Holding a green card means that the cardholder has the permanent residence in the issuing country, and at the same time, holding a green card can exempt entry visas for a certain period of time.