我又在网上查了一下,很多人去加拿大短期开会或旅游都还是签去加拿大的签证. 你说去加拿大不用签证的依据是什么? 有没有官方文件? 谢谢!!
-You of course need a Canada visa to enter Canada! (my above answer for your second question was wrong, so just ignore it). You do not need to get the H1 visa (US visa) to return to US by use of Automatic Visa Revalidation rule if you just stay in Canada <30 days.
See:
http://www.ohr.wisc.edu/ifss/AutomaticVisaRevalidation.htm
http://travel.state.gov/visa/temp/info/info_1299.html
http://travel.state.gov/visa/laws/telegrams/telegrams_1441.html
http://cbp.gov/linkhandler/cgov/travel/id_visa/revalidation.ctt/revalidation.pdf
