Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Sampling sites in this research, including Lhasa, Yushu, and Shangri-la. The three sampling locations are represented by different shapes on the map. Triangle: Yushu (Qinghai Province); pentagon: Lhasa (Tibet Autonomous Region); circle: Shangri-La (Yunnan Province).
