The name "Xiaotianchi" 3 kilometers north of Changbai Mountain is actually called Yinhuanhu Lake. The lake is round, the water is green and transparent, and the clear reflection makes me look back at the photos for a while and I can't tell which end is on the lake and which end is under the lake. Mountains surround the lake, and birch forests vary in form. It is said that this is also the location of TV series "Snow Mountain Flying Fox", "Journey to the West". Beautiful.