Changbai Mountain Xiaotianchi is located in the southeast of Jilin Province, the border lake between China and North Korea, the north of the lake is in Jilin Province, the source of the Songhua River. Xiaotianchi is 3 kilometers north of Changbai Waterfall, and there are two Xiaotianchi. A hidden in the quiet Yuelu Forest, 1780 meters above sea level, the lake is circular, the area is 5380 square meters, the water depth is more than 10 meters, the lake is green. About 200 meters from Xiaotianchi, there is a round pool and its size is not much different, but the water is very shallow, only a few meters deep, sometimes dry, revealing yellow soil. Up high looking down, a blue, a red yellow, like a pair of gold and silver cups, so people also called Xiaotianchi for the cup lake, unique scenery.