How to become an American citizen when you immigrate to the United States with a green card?

Green cards are for foreigners to immigrate to the United States. If you get a green card in the United States, you are a legal resident. You can live, work and study in the United States, but you have to pay taxes.

-basically have the same rights and obligations as citizens, but have no right to vote. In addition, the green card may be cancelled (for example, an immigration officer may take your green card if he thinks you have no intention of living in the United States), but the "citizen" will not be cancelled.

After living in the United States for five years, green card holders can apply for citizenship and take citizenship exams. As long as you are prepared (there are officially published "textbooks"), it won't be too difficult (the purpose of the exam is not to make things difficult for you).

The United States recognizes dual citizenship (for example, a Korean can be a citizen of both Korea and the United States and hold passports of both countries), but China does not allow dual citizenship at present. If you want to be naturalized in the United States, you must give up China International.