How go to bird nest from badaling great wall

From Badaling, you can take bus no. 877 to Deshengmen, then walk to Jishuitan subway station and take Line 2 to Gulou Dajie, then change to Line 8 and get off at Aoti Zhongxin (Olympic Sports Center) Station, get out from exit B2 and walk north to get to the Bird Nest. Jinsong is one of the stations of subway line 10. You may take subway line 8 from Bird Nest and then change to line 10 to the station.