From Zhongdian (Shangri La) over Litang, Tagong and Danba to Chengdu. A great ride, very varied. Because it is completely outside the TAR it is mostly possible to do without problems. There are 24'000 vertical meters to cover along the 1800km!
Mostly paved. Only the first two passes after Zhongdian are dirt road. But the pavement is often very poor with lane grooves and generally bumpy.
Accommodation can be found in Zhongdian, Xiangcheng, Litang, Yajiang, Tagong, Danba. From here on there are many places. Good shopping in all the above places too. In between often simple shops. Camping is always possible.