How long do you have to stay in the United States with an American green card every year?

A three-month US green card must stay in the United States for at least three months each year. If one year is less than three months, it means that the willingness to apply for a green card is inconsistent with the actual behavior and there is no plan to stay in the United States for a long time. Do not rule out the possibility of revoking the green card qualification next time. The American green card generally refers to the American permanent resident card, and the return to China does not exceed 1 year. According to the immigration law of the United States, permanent residents must use a valid immigration visa and a valid home country passport to enter the United States, otherwise they are not allowed to enter the country. According to American immigration law, green card holders must not leave the United States for more than 40 days at a time. /zd/xx