如何保持綠卡

I have a question how to keep the Green Card. I am in USA now. I am going to work in China two more years. I would like keep Green Card. What form will I need to apply ? I need your help!!!!!!

所有跟帖： 

• 申請一個白皮書.保證你的綠卡能回來. -天平上的貓- ♂ (0 bytes) () 07/19/2007 postreply 13:17:04

• Form I-131,but can't more than two years -xiaobaitu- ♀ (0 bytes) () 07/19/2007 postreply 16:36:56