How long can I stay in China every year after I get the American green card?

1, the United States can stay in China for half a year with a green card.

2. American permanent resident card is a modern word, a proper noun, also called green card, which refers to the identity card used to prove that foreigners have permanent resident status in the United States of America. A green card is a permanent residence permit for foreigners in the United States. With this card, you basically have the rights and benefits of American citizens. The main difference between green card status and citizens is that they have no right to vote and stand for election. "Getting a green card" refers to the immigration process of becoming a permanent resident.

3. According to American immigration law, permanent residents must use a valid immigration visa and a valid passport of their own country to enter the United States, otherwise they are not allowed to enter the country. After having an American green card, as long as you leave the United States for less than one year, the green card itself can be regarded as a valid entry immigrant visa, and you don't need to apply for a visa at the American embassy or consulate. If you leave the United States for more than one year, you must apply for a re-entry permit before leaving the country. As a valid immigrant visa, the re-entry permit is valid for a maximum of two years. Cardholders who have not entered the United States for more than a period of time are likely to lose their permanent residency when they enter the country, because the immigration law requires green card holders to leave the United States only temporarily.