863211/Pijiang老師

Dear 863211/Pijiang,

I have a question, As a green card holder, how immigration officier knows when I left the US to another country? How do they know how long I stay overseas? When I passed the customs of US, do they record the dates of exits and entries while I passed the customs? But how do they record the date of leaving the country? 

Thanks very much!

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• 回複：863211/Pijiang老師 -pjiang- ♀ (119 bytes) () 12/22/2010 postreply 05:49:18