Fairly difficult to get to. Start in Zhongdian or Chengdu and find a bus to Daocheng. Get supplies there and then find a ride to Yading village. Shoulder your pack and head into the Himalaya from there.
This is one of the most magical places in the Himalaya and the probable inspiration for the mythical paradise of Shangri La. And, for the time being, nobody has ever heard of it. Visit in autumn when the larches are peaking in golden splendor.