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來源: 於 2016-01-20 17:47:48 [博客] [舊帖] [給我悄悄話] 本文已被閱讀：次

 尊敬的8老師, 你能告訴我綠卡持有者每年在美國要呆滿六個月還是９個月？

-The principle is that the green card is for you stay in US permanently. It is fine for you occasionally to travel to China and stay there for < one year. But you can not travel forth and back between China and US too often.