Flying can help answering this:I will also apply for a b1 visa for a conference and i am in year4. From your experiences if most such cases got rejected as I am having quite the similar conditions as you did.
In addition, I will apply visa agent and I have previously been to US for about 10days with a B2 visa before, can that help? Thanks a lot
I think you misunderstood me.
What I was referring to was specific cases where they give you ridiculous reasons for rejecting your visa. As you've been to U.S. before by B2 visa, and you have not got any rejection so far (good luck!), your situation is completely different. All I can do to help now is to wish you your best luck! :^)
Huasing Association 1999 - 2013