Hello! if we want to go from CTU to Dujiangyan on a Wednesday morning, which is best?

You can take the shuttle bus straight to Dujiangyan, and the bus is available at 9:40, 10:40, 11:30 and 12:40 in the morning.

Helen is right. The bus stop places is in-between the Terminal 1 and Terminal 2. Just ask the staff of information office. they will tell you. We use our Chinese ID card, I'm not sure whether you can use your passport number when booking online . Try it. after booking, go to the ticket ATM to obtain the physical ticket. It takes around 1.3h to get there.