How long does it take for the US green card to leave the country now? Six months or three months?

If you leave the United States for more than one year, you must apply for a re-entry visa (I-327) before leaving the country. Re-entry visa, as an effective immigrant visa, is valid for up to 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.

Those who already have a green card (or temporary green card) status can apply for re-entry permission to the United States, avoiding the trouble of face-to-face signing by embassies and consulates. If the green card was obtained through refugee or asylum status, they can also apply for a refugee travel permit. If you only have a student or work visa and have not submitted an immigration application, or have submitted an immigration application, but have not submitted an I-485 application due to scheduling problems, you cannot apply for a re-entry permit for the time being.

Extended data:

Foreigners applying for a green card can apply for two important permits. One is the authorized employment card, a temporary work permit that allows foreigners to find jobs in the United States. The second is the early entry permit, which is a temporary travel document that allows foreigners to return to the United States.

The rights granted by these two licenses are independent of any existing status granted to foreigners. For example, a foreigner with an H- 1B visa may have obtained permission to work in the United States.

Baidu Encyclopedia-American Green Card