Goos Mum,
I also used Konglin is and he really is excellent.
We went to Mutianyu, then lunch and the Lama Temple he even wanted to take us shopping afterwards but my little sister wasn't us to it as she had a sore back.
We also got Kung Fu tickets through him and he picked us up and made sure we were seated before he left the theater and this was a different night to our day tour with him. You really could not get better service. Thismight sound tacky but when you can't speak the language and many instructions are written in Chinese someone like Konglin is a godsend.
He also has a lovely gilfriend Voilet who is also a guide so it's go to contact them as you may get lucky and 1 of them is free for your day out.
Konglin's details are:
konglin316@hotmail.com
Mobile in China: 1314 6901596