I've seen map ORAC - quite useful. I spent time at college studying frontiers & boundaries and the Indo- CHina one was a classic example. Lines on maps that bear little relationship to what's on the ground. As I've said have a look at the Galwan River on GE - it a flat bottomed slot in the mountains with permanent glaciers on the ridge tops and in some of the feeder valleys. Almost no vegetation and a dusty wind blown stone plain with a wildly meandering river running down it. The Indians appear to have built a road quite a long ways up the valley on the SW side and there are occasional ragged "hamlets" and the odd military camp. But it is a hellish spot with absolutely no military value whatsoever.
No-one ever went here except for the odd trader or big game hunter - hence things like the "johnson Line"
One thing is for sure - until they both sit down and negotiate with an open mind and then properly delineate and demarcate it it will continue to fester.