By the way,

來源: 於 2012-12-28 12:00:09 [博客] [舊帖] [給我悄悄話] 本文已被閱讀：次

after your child get the 旅行證, he/she needs to use his/her US passport to leave US, use the 旅行證 to enter China; then use the US passport and the 旅行證 to leave China and use the US passport to reenter US.