回複:請問拿到加拿大楓葉卡以後多久才能申請多次往返H1簽證?
I went to the US Consulate in Toronto to apply for my H1B visa stamp the next day right after I landed in Canada as a PR. At that time I even didn't get my maple card yet but I got 3-year multiple-entry H1B visa stamp. Don't worry.