回复：No. Must apply for it in US.

来源: 于 2013-09-20 13:10:47 [旧帖] [给我悄悄话] 本文已被阅读：次

Thanks for your reply.
So if my parents stay in China over 1 year, when they come back to US, their green card will be 作废，是吗？他们会在入关时被返回吗？还是需要签证？