looked and zoomed a bit on Bing Maps (http://binged.it/YolbfN) - and - it must be Letters
after that in google maps https://maps.google.de/?ll=30.037912,101.487676&spn=0.001997,0.002411&t=h&z=19
wth? there is some houslike colored thing in the south of that and the same letters again a little bit smaller.
Talked a little bit in IRC and rasher means: https://en.wikipedia.org/wiki/File:Tibetan_script.svg
Someone wants to translate (if its correct)?