签个H1B，这样在年底回国时，就不用返签H1B了？
-Yes, people do it all the time. but you need to use the H1 visa to enter US and get the new H1 I-94 at the port of entry.
从加国签H1B回美国容易么？
-Normally it should be fine, but no one can say 100%. The only issue is that if you can not get the visa, you have to go back to China directly from Canada because you can not use the old H1 I-94 to return to US in this case
