Why is Blue Moon Valley blue?

Because Yulong Snow Mountain contains copper sulfate. As the meltwater on the mountain flows to the Blue Moon Valley. Copper sulfate turns blue when it meets water. It is said that the water in the Blue Moon Valley is blue as long as it is sunny, and the valley is crescent-shaped. From a distance, it looks like a blue moon embedded at the foot of Yulong Snow Mountain. His name is Blue Moon Valley. Blue Moon Valley is located in the valley north of Ganhaizi at the eastern foot of Yulong Snow Mountain and south of Yunshan Ping. The water in the lake is cold. The water in Blue Moon Valley contains copper ions and is not drinkable. The snow and ice of Yulong Snow Mountain melted into river water and passed through a valley at the eastern foot of Xueshan Mountain. Because the moon is reflected in the blue lagoon under the blue sky, it is similar to the Blue Moon Valley in the Lost Horizon by the British writer james hilton. The river in the Blue Moon Valley was cut off by mountains during its flow. Form four large water surfaces. Blue Moon Lake and Tingtao Lake, known as Yuye Lake and Jingtan Lake, are surrounded by lush vegetation. The lake with the snow peak as the background in the distance is transparent blue. Dot a little green in the almost frozen blue. In the middle of the lake, look around the reflection of white clouds floating in the mountains. The dream is like a fairyland. The water in Jingtan Lake is very cold.