How do you get onto the wall without having to climb the wall?

Red, you can use the cable car to reach the top of the wall and then return to the root area by cable car too.

Red, I would advise you to go to Mutianyu via bus 930, then hire a cab or minivan. The Express bus 867 is no longer available. Also, it is 30% cheaper if you use the Beijing Transportation Smart Card (Deposit RMB20 and 1st reload RMB20) fully refundable even at Airport Terminal. There are a total of 23 towers, you can take a cable car up/down to/from Tower 6 or Tower 14. Please try the tubboggan ride down from Tower 6... an experience you will truly enjoy.

YJ from Malaysia