中国护照,原来在温哥华签的TD签证到期,有TN延期3年的批准,
-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.
还要去境外领事馆申请新的visa stamp吗?
-Yes, if you do not want to extend it within US by filing I-539.
还是在边境就可以换取新的I-94.
-No. You are not qualified for this benefit because you are a Chinese citizen.