Judging from the spider nets, there in some parts there was no one for at least couple of weeks. Yet all along there is some kind of path: I was worried about the vegetation but this up in the mountains North of China it's dry so bushes and trees don't recover that quickly.
There were some very hard parts where certain climbing skill was necessary, particularly because of the heavy backpack(had 10 - 15 kilos). But it was so much fun! Fortunately there was vegetation I could use instead of a rope. A rope and two people would be more handy though on at least two spots. Like this it took much longer. Twice I had to climb over barbed wire, in a fruit plantation. (BTW the ripe plums in the hot weather were really tempting, yet I withheld myself. I'm not a thief.)
For now I share just GPX, I plan to describe each part in more detail once I am behind the great firewall and also share some pictures .