Introduction to Baishi Qingyun: "Baishi Qingyun" is the first of the twelve ancient scenic spots in Laiyuan. It means that even on a sunny day, there will be clouds on the top of Baishi Mountain. The cloudy and foggy Baishi Mountain is caused by the white stone mountain. Determined by the special geological structure. The continuous rising of air and the continuous replenishment of water vapor are the conditions for the formation of clouds and fog.