From the City to Badalling Great Wall and how much cost?

You want to go to the Badaling Great Wall by public transportation? Walk to Dengshikou Station of Subway Line 5 and take Line 5 to Yonghegong and then change to Line 2 to Jishuitan Station. Get out from Exit A and walk forward to find the Deshengmen Arrow Gate. There is special 919 bus line to Badaling behind the gate. The cost is 2rmb for subway and 12rmb for the bus.