How would I get to the Bejing Hub of Dispatch from the Pulman South?

Take subway line of Yizhuang from East Rongjing street station to Songjiazhuang station, and transfer to metro line 5 to Yonghegong station, and take metro line 2 to Jishuitan station, then take bus 877 from Deshengmen station to Badaling great wall station, and walk north around 200m to it. It takes around 2.5 hours with CNY18.