how to go to simatai from changping by bus?

It is suggested to take subway Changping Line to Xierqi Station and transfer to subway line 13 to Dongzhimen Station, Exit C. Then walk south around 500 meters to get to Dongzhimen Bus Station. Take bus no.980 Express to Miyun Bus Station. After that, transfer to bus Mi.37, Mi.50 or Mi.51 to Simatai Village Station. Then just walk to the entrance of the great wall.