Introduction to Xiagui Yaochi: Yaochi is 1,125 meters above sea level, covering an area of about 1,200 square meters, with an average water depth of 1.2 meters and visibility of less than 1 meter. Half of the water area is covered with aquatic plants and shrubs, with a height of no more than 1.5 meters and a low density. The peculiarity is that the plants in the lake fall off their leaves and go dormant every autumn and winter, and then glow with new green in the following spring, starting again every year. The landscape of Yaochi was originally a volcanic crater. Now the volcano has become an extinct volcano and no longer erupts. The original volcanic crater formed a depression under the influence of nature and turned into a pool over time.