I started from where the road joint the trail in Tangkou village, and ended on the summit of Mt. Taibai, 3750m(12300ft).
Unsupported. I took all my food, get water from stream and springs.
I finished this trail in 17:46:38, I recorded the route with Suunto Ambit3 peak, the GPS tracks is available here: https://www.strava.com/activities/659999578