中國護照,原來在溫哥華簽的TD簽證到期,有TN延期3年的批準,
-Do you mean your spouse TN has been extended? If so, you can file I-539 to extned your TD within US and do not need to go outside US to get the TD visa to come back.
還要去境外領事館申請新的visa stamp嗎?
-Yes, if you do not want to extend it within US by filing I-539.
還是在邊境就可以換取新的I-94.
-No. You are not qualified for this benefit because you are a Chinese citizen.