另外仔细看了以前的博克, 提到"除非是不可抗力原因, 否则超期不归的话绿卡会被收回". 可否请教一下:
1. 哪些原因可能是"不可抗力"的呢?
-Such as war, nature disaster, illness, etc.
2. 如果回程时绿卡收回, 还可一在美国待一段时间吗? 还是就地返回?
-Depends on the CBP officer. If they allow you to enter US, they may issue a B2 I-94 to you at the port of entry. If they do not allow you to enter US, you have to return to China.
再次感
