How to keep green card, if back to China?

I have green card. However, It is hard to find a job in US. I decide back to China to find a job. I still want to keep green card. should I come back to U.S after 6 month?

所有跟帖： 

• 回複：How to keep green card, if back to China? -freshEE- ♂ (55 bytes) () 06/21/2009 postreply 15:36:05

• 你可以填一個131表，兩年內不回美國，綠卡也有效！ -sun105- ♂ (79 bytes) () 06/22/2009 postreply 12:47:08

• I-131是回美證,它真的2年再入境不會有問題嗎? -sunrain5566- ♀ (0 bytes) () 06/22/2009 postreply 18:15:45