In china,he also has many other vtg mtb,Most of them were acquired on eBay.Those brake bosses are GT style (not Xizang though)
The seat tube slot is on the front like a Zaskar. As the Xizang and Lightning are on the rear.
That brake bridge plate is 93-95.
The inner dropout has the machined cut out which is 95.
Apart from the lack of gussets on the headtube and the end cap being round. It is like a Zaskar but Ti.
Again…. Where is this frame in the world?