回复：父母拿到绿卡回中国过年，本来打算半年后回美国的，因为家里出了事，需要留在中国，应该怎么样才能保留绿卡呢

As on as they come back to US within one year, their GC will be fine. If they stay in China for > one year, their GC will be valid unless there is something uncontrol to prevent them to return to US such as serious illness or natural disaster.

所有跟帖： 

• 回美后可以办回美证就可以在中国两年是吗，二个月可以办下来吗，回美证办完一次后还可以再办吗，需要在美国报点税比较好点？， -ericandowen- ♀ (0 bytes) () 03/11/2011 postreply 15:33:26

• 给你父母提个醒，尽量别太长时间呆在国内 -ann1sky2- ♀ (199 bytes) () 03/12/2011 postreply 17:43:32

• 谢谢，也是。在申请RP之前还是要半年内回来的好，不然 -ericandowen- ♀ (49 bytes) () 03/13/2011 postreply 13:32:33