父母綠卡申請還在等,如果用現有的AP回國, AP明年3月到期,如果綠卡在AP到期之前還是未批的話,我可否再次申請AP, 然後寄回國內? -No, they have to return to US before the current AP expires and file I-131 for renewal. Then, they have to wait for the new AP approval to travel again.