Introduction to the natural stone bridge: Walking into Lanke Mountain, you can see a majestic and unique stone bridge lying on the top of the mountain from a long distance. This is the natural bridge of "Qingxia Jinghua Cave Sky", written by Du Guangting in the Tang Dynasty. "The Legend of Cave Heaven and Blessed Land" calls it: "The Eighth Cave Heaven of Qingxia". The Taoist "Dongtian Blessed Land" calls Lanke Mountain one of the seventy-two blessed places. "The 30th Lanke Mountain is located in Xin'an County, Quzhou, where Mr. Wang Zhi lives in hiding place."