This is a wrong statement:
他出境中国得用有效的中国的旅行证,不能用美国护照
The US passport must be used to leave China in whatever situation, because passport itself is the most basic travel document in addition to a citizenship doc.
他出境中国得用有效的中国的旅行证,不能用美国护照
The US passport must be used to leave China in whatever situation, because passport itself is the most basic travel document in addition to a citizenship doc.