Introduction to Immortal Palace: Immortal Palace is also known as Shuitian Cave. There is a flat stone rock on the cliff, more than 50 meters above Longtan. arts. In the 40th year of the Jiaqing Dynasty in the Ming Dynasty (1561), there was a severe drought in the spring. The county magistrate Tan Weiding, named Pingtai, led people here to pray for rain. By chance, God made a good move, and as soon as the incense was lit, the rain fell. The people of the city carved "Pingtai Linyu" to commemorate it. During the Qianlong period of the Qing Dynasty, Zhang Quan, the county magistrate, engraved the four words "Gaoze Xiamin" next to it.