8老師,如果持GC回國長期生活工作,多久需要回美國一次?
-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.
每次要呆多長時間? GC有無可能被revoke? 請您簡單介紹一下,謝謝。