The Xishuangbanna of Gansu.

Located at the foot of Xionghuang Mountain at the source of Yangtang River in Tianchi Township, Wen County, Gansu Province, it is one of the four major Tianchi Lakes in China, along with Tianchi Lake on Changbai Mountain, Tianchi Lake on Tianshan Mountain, and Mengda Tianchi Lake in Qinghai. It is known as the "Xishuangbanna of Gansu" and is famous for its unique natural scenery and rich biodiversity. Wen County Tianchi Lake is 85 km northwest of Wen County and 164 km from Jiuzhaigou Scenic Area. The lake is 1,728 meters above sea level, with a water area of 0.88 square kilometers, a circumference of about 40 Chinese miles, and a maximum depth of 75 meters. It is a high-altitude barrier lake.