Laang is located in Pulan County, Ali District, Tibet Autonomous Region, northeast of the holy lake Mapangcuo, next to the traffic road to Pulan County, so the traffic is more convenient. Although adjacent to the holy lake, the same lake water blue beautiful Laang is called "ghost lake", the reason may be that Mapanyucuo is a freshwater lake, the lake water can be drunk by people and animals, and Laangguo is a salt water lake, the lake around the grass is not born, the lake water is not drinkable. There are always two sides of things, there are holy lakes, there are ghost lakes.