回複：回複：請問：H1, F1身份登陸加拿大返美需要簽證嗎？

看了pijiang的鏈接，困惑的是：如何理解
https://www.nvars.com/Production/userhome.aspx
裏麵的這段話？

Beginning March 17, 2003, ALL landed immigrants in Canada (including those individuals from a British Commonwealth country) seeking to enter the United States as non-immigrants must possess a valid passport and non-immigrant visa in order to enter.

要是入境的時候，邊境官員死扣這句話，非要一個能看得見摸得著的簽證，那我這樣的在美國從F1換成H1，還一直沒有出過境的，又沒有去申請簽證的，豈不是死翹翹了？
期待解惑中。