555,I found the I-94 card after I came back home.
According to the card, I have to surrender it when I leave US
Otherwise, I might be delayed next time when I go to US
I call the airline company, but they say they don't know anything about it
I call the US custom in the airport, always busy.
What should I do now?
Who can tell me?
My website http://fun.to/hongwei