Sorry I can not tye Chinese now,
I have changed my passport because all pages of my old passport was used up,
Will the Visa Officer require my old passport? I got B2 visa twice to US last year, but recently I went to Iran for a business trip, that visa was on my old passport, could the Visa Officer possible know that? should I tell them or not?
I will go for visa in two days, I really appretiate your advice,
Thanks!