863211/Pijiang老师 future19992010-12-22 12:44:44

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!

回复：863211/Pijiang老师