回複:請教有從美國一個人帶兩個或兩個以上孩子回國的姐妹
I don't know the answers to the other questions. For #3, in general,the exchange counter is always open when there are flights coming into the airport. I just came back from China. If you need a couple of hundred of RMB in hand just in case, I can mail it to you (you can mail it back to me after you come back).