Emerald Lake is located in the salt lake mining area of the former Dachaidan Chemical Factory in Haixi Mongolian and Tibetan Autonomous Prefecture, Qinghai Province. Because the lake is clear blue in the sun and the color is like jade, it is named "Emerald Lake". Emerald Lake is still an undeveloped virgin landscape. The color of the Emerald Lake varies with the mineral concentration contained in the lake and the weather conditions.