H1B visa stamp from Canada

I am a H1B visa holder and Canada PR. I plan to go back China in Christmas Holiday. I intend to apply H1B visa stamp in Canada before going back China. My questions are: 1) Is it risky? 2) Is the H visa has two times of entry to the US border? 3) Is the H1 visa valid for 3 months or six months? 4) Can I get the visa the same day or next day if approved?
Many thanks.

所有跟帖： 

• 回複：H1B visa stamp from Canada -StoneBrain- ♂ (437 bytes) () 09/13/2004 postreply 10:56:24

• 回複：H1B visa stamp from Canada -ambersdad- ♂ (1738 bytes) () 09/13/2004 postreply 11:15:09

• Someone gave you a wrong ... -CanImm- ♂ (79 bytes) () 09/13/2004 postreply 13:33:14

• 回複：Someone gave you a wrong .. -ambersdad- ♂ (132 bytes) () 09/14/2004 postreply 08:10:06