http://www.theschoolhouseatmutianyu....tianyu_map.pdf
here is a map of Mutianyu and Beigou village.
be careful, the distance are wrong.
the hike 6 starts at the sign "no tourist passing"
the hike 7 arrive on the wild wall. On the wall, go on your left to walk back to the renovated part (40min). no water seller, take everything you need before.
the hike 8 starts 50m before the end of the road, on the right, close to the 3rd millstone.
Hike 6 and 8 : you arrive on the wall without paying ticket.
If you are good trekker, you should walk faster than what is written on this map.