美簽J1申請

請問我哥哥這月底要去美國用J1的簽證做醫學研究半年,但是半年後要去不同的州做醫學研究, 那一州的申請要四月份才會下來, 到時我哥必須要到第三國辦理J1的簽證, 是要到加拿大就可以嗎? 還是要回來台灣呢? 要怎麼處理呢? 謝謝
更新: Before Gary posted that link here, I already called the number. They said, " Technically, you can go to the third country, say Canada, to extend your J1 Visa. It's very common here. " I think my brother doesn't have to come back to Taiwan to renew or extend his J1 Visa.
更新 2: Thank you for your answers though.
更新 3: By the end of July, his J1 Visa expires and he is still in America. I guess it'll be easier for him to go to Canada instead of coming back to AIT.
更新 4: Thanks.
2 個解答 2