Beijing-Xining-Lhasa-Katmandhu-India : HELP
 

hi,
i have so far being an indian himalaya guy, riding across Himachal in India and all on my motorcycle.

im now plannin to fly with my bike to beijing and ride back to India via Xining-Lhasa-Katmandhu. Am i being optimistic or is it possible?
I dont know where to start, how to start.

dug up some sites for info and maps too. but next step?