Where is Lungchem, probably between Chamdo and Lhasa

The title says it. It is a place on the way to Lhasa, probably starting from Chamdo.

Yep, I know, more than 1000 km. In the '90s it was a place where the motor road ended.

So far my searches have not turned up a place with a name like that. I say "like that" because the name might well have been mis-heard.

Hmmm...