Ask: H1B visa stamping in Canada

Hello everyone,

I'd like to go to China for a short visit in this August.

I have my Canada immigration approved and need to go to Montreal for landing very soon.
I 'd like to take this chance go to Montreal Canada for H1B visa stamping. Right now I have I-485 pending and I have my Advanced Parole approved. I entered into USA with F1 visa and is now with H1B but with no H1B visa stamping.

Instead of using Advanced Parole, I 'd like to keep my H1B visa and have a H1B visa stamping.

Is there any potential risk for me in terms of H1B visa stamping? If the H1B visa stamping get rejected or holding for security check, can I still be able to return to the USA with my Advanced Parole?

Thanks for your help.


yy1