Introduction to Tiansheng Bridge: It is located on the Yaotai Waterfall with a height of 112m, spanning the north and south ends of the waterfall. It is the first gneiss overpass discovered in my country. It is 2.8-2.9 billion years old. It was formed by the erosion and collapse of valley waterfalls along fissures. It is rare in the country. The bridge deck is made of pegmatite, which is relatively hard and slightly arched. The bridge is 27 meters long, 13 meters wide and 13 meters high. The terrain here is very steep, and when viewed from the bridge, the abyss of a hundred feet is terrifying. The rushing waterfall roars from under the bridge, forming a 100-meter waterfall, which is majestic and magnificent.