"Baiyun Spring is on Tianping Mountain, and the clouds are idle and there is no water" comes from a poem by Wang Zhihuan, a poet in the Tang Dynasty, in the Lodge of Herons. This poem depicts the scene when climbing a mirage in Tianping Mountain. "Baiyun Spring on Tianping Mountain" means that there are clear springs and floating white clouds on Tianping Mountain. "Clouds are carefree and have no intention of water" expresses the meaning that clouds and water in nature have no troubles and interference. This poem means that on the mountain, people can enjoy the quiet and natural beauty, which has nothing to do with the impetuous and secular disturbances. Compared with nature, people's troubles and worries seem insignificant, as if the world itself has reached a peaceful state.