8老师,如果持GC回国长期生活工作,多久需要回美国一次?
-You have to have reentry permit (RP) to stay in China which allow you to stay there for > 1 year < 2 years. You may renew your RP again.
每次要呆多长时间? GC有无可能被revoke? 请您简单介绍一下,谢谢。