If you immigrate to the United States, can you run for president?

No, the right to vote and stand for election is limited to American citizens.

Just because you have a green card doesn't mean you are an American citizen. You are also a citizen of China, with China nationality and China passport.

You have to take the citizenship test to be elected. A green card is just a long-term visa that provides permanent residency.

Immigrants get green cards, not change their nationality. It takes a long time to take the citizenship exam. First, you must hold a green card for a certain number of years, then take the naturalization test, and then equal the sign. Without a few years of 10, you can't get citizens.