Badaling Great Wall is excellent, and No.919 bus is fast. But you should be aware of the cheats in No.919 bus station with red flags in their hands. They led me to wait for No.919 in the bus station, but for a long time, I could not see the bus. I became worried and they told me the 919 bus is quite slow and charge about CNy 80 and spend three hours to get to the Badaling. They suggest me to take the minibus (may be run by themselves) and said it is fast and cheap. I get too late and get on the bus, but they charge me for CNY 400 for a round trip. I have no other choice as I am on the bus. These people are degrading cheats. I hope relevant department should deal with this. And here I want to tell any visitor to Badaling Great Wall, don't fall into their trap. If you don't know which is the true No.919 bus, go to ask the stuff. The No.919 bus station is located behind Deshengmen Gate and the bus ticket only costs CNY 12!