Tianchi Lake is a masterpiece of ancient glacier movement and belongs to moraine lake. There have been four glacial movements on the earth since the fourth century, and the formation of Tianchi can be roughly divided into three stages. After three times of accumulation, a closed depression was formed in the mountain, which blocked the melting water of snow and ice and the precipitation in the mountain. Finally, the ridge was as high as 286 meters, thus giving birth to the beautiful Tianchi.