請問8老師：老公原來的國籍是加拿大，他最近入美國籍後申請了美國護照。現在他需要回中國出差。他能不能用原來加拿大護照裏的10年中國簽證入境中國？
-I think so. If he wants to enter/depart China as a US citizen, he needs to show both his Canadain passport (which has the visa) and US passport to the Chinese Customs officer.
還是他必須用他的美國護照重新申請中國簽證？謝謝！
