can we go Badaling great wall by sub way train/ bus from wanggfujing area? pl. guide us in detail.

There is no direct bus, train or subway that leads to Badaling. You may take subway line 1 and get off at Fuxingmen Station. There you can take subway line 2 to Xizhimen Station. Then you exit at A2 and walk around 100 meters toward north to reach Beijing North. After you arrive at the station, you can take S2 train to Badaling.

Or you can take No. 10 bus and get off at Tian'anmenxi Station. There you can take No.5 bus to Deshengmen. Then you can take No.919 or 877 to Badaling.