請教8老師，幫助父母申請綠卡，如果近年他們不能呆美國，有沒有辦法不影響綠卡而在中國呆一段時間呢？
-Yes. If your parents file I-485, they can apply for advance parole (AP) at the same time or later. AP can allow thme to travel to China and stay there for less than one year during I-485 pending. If they get the green card already, they can apply for reentry permit which allows them to stay in China for > one year < two years.
謝謝／
