C1627 I Really Have to Thank You

The Heavenly Lake was located in Changbai Mountain, and the Changbai Mountains were the birthplace of the Yalu River, Songhua River, and Tu Liang River. It was the birthplace of Manchu and Manchu culture.

At the same time, Changbai Mountain was a dormant volcano. The volcanic crater formed into a lake, and the lake water was blue in the summer. The ice was white in the winter