父母的綠卡正在進行中， 手指莫打了， 爸爸的不合格要重新打。 回美紙批了一年的。
麵試還沒有消息。父母急著想回去。 我的問題是：
1）如果麵試通知來了，最長可以延遲多久？
-May be a copule of months, depends on how busy the USCIS ASC center. By the way, you can not control/select the reschedule timing and USCIS will send you a new appointment notice. It seems to me your parents's AP nearly expires because 回美紙批了一年的. So, they may need to apply for a new one for the travel.
他們想在國內多住些日子。
2）如果在回美紙上的日子之外回來有問題嗎？
-The Advanced paorle (AP) maxium is one year from the date it is issued. Check the expiration date on the AP and they have to come back to US before the AP expires.
以前忘了好像在哪裏看到說有了回美紙在境外最多可以2年？
-That is reentry permit (RP) for the green card holder, not AP for the I-485 applicant (e.g. your parents).
可是回美紙兩張都是一年的。回美紙在出境的時候也用嗎？
-No if it expires.
3）他們的簽證還沒有過期，離境的時候還需要交1-94嗎？ 如果在簽證有效期入境的話，回美紙還用嗎？
-They need to turn in their I-94s to the airlines as everyone does if they leave US. They can not use the B2 visa anymore because they have the immigration intent (I-485 filing). If they leave US without AP, their I-485 will be void and they also can not enter US using B2 visa due to immigration intent. So, they only can apply for the immigration visa in China by filing I-824 which may take one to two years.
