Ask google.

Wall,,, I mean Walk...

You know what I said the first time I seen that thing?

I said 'That really is a great wall'.

See,,, I'm original!

4 Tellings from DuckDuckGo:

Mutianyu Great Wall - Tours, Tickets and Activities ADBook your Mutianyu Visit Online Now. Tours & Tickets for Great Prices!www.getyourguide.com/Mutianyu-Tours/ActivitiesReport Ad慕田峪长?Mutianyu Great WallTake a Fresh Air Break at Mutianyu Great Wall! Despite the hundreds of buses that visit daily, the Great Wall at Mutianyu is not as crowded as the nearby Badaling or Juyongguan sections of the Wall.mutianyugreatwall.net Mutianyu Great Wall (Beijing) - 2018 All You Need to Know ...Book your tickets online for Mutianyu Great Wall, Beijing: See 20,007 reviews, articles, and 15,657 photos of Mutianyu Great Wall, ranked No.1 on TripAdvisor among 1,623 attractions in Beijing.https://www.tripadvisor.com/Attraction_Review-g294212-d325811-Reviews...Mutianyu Great Wall, Beijing: Tours, Facts, TipsThe Great Wall of Mutianyu, 65km to the north of Beijing city proper, is less crowded compared to Badaling, but with attractive scenery all year round.https://www.travelchinaguide.com/china_great_wall/scene/beijing/mutianyu.htm

Thanks for your answers and I find MUBUS here http://www.beijingmubus.com/

“MUBUS, the Mutianyu Great Wall Direct Bus, will offer you a Free and Easy bus transfer service from Beijing to the Mutianyu Great Wall everyday, the TOP 1 Great Wall reviewed on the Tripadvisor.com. Take MUBUS, you will :

* Get Direct Bus to the Mutianyu Great Wall.

* Round way from Beijing to Mutianyu by Highway.

* Have more sightseeing time on the Great Wall (4.5 hours).

MUBUS Information: 

Departure Point: Main Gate of Swissotel Hotel（Subway Line2 Dongsishitiao Exit C）. Beijing. 

Departure Time: 8:00am (Everyday)

I will share my experience when I come back.

You can take a didi, or better yet call a shun feng che and hitch a ride with other people going there.