The difference between American green card and American citizen

A green card in the United States is proof of permanent residence in the United States. Having a green card means having permanent residency, that is, foreigners who can stay in the United States for a long time. "Immigrating to the United States" means becoming a permanent resident of the United States. The differences between American citizens and American permanent residents, that is, green card holders, are as follows:

1, American citizens can apply for relatives to immigrate to the United States;

2. Working in the federal government;

3. Engaged in special industries that American citizens can do, such as military industry;

4. Citizenship cannot be revoked, and the green card can be revoked after the holder leaves the United States for a long time;

5. Elect and be elected as representatives of public opinion;

6. Serving in wartime and being protected by the United States overseas.