One thing we must understand is that this rule does not apply in the United States. Generally speaking, graduate employment in the United States is not as good as undergraduate employment. In the United States, most students choose employment after graduation.

The concrete manifestation of permanent residency in the United States is to obtain a permanent resident card in the United States through legal channels, also known as a green card.

This is an ID card used to prove that foreigners have permanent resident status in the United States.