Introduction to Yingyang Cave: It was dug at the foot of the east cliff of Nantianmen in the eighth year of Wanli in the Ming Dynasty. It was named because it faces the east and welcomes the sun. In front of the cave, there was originally a small building built according to the mountain situation, with three sides soaring in the air and a unique style. When climbing the building, you can see the Erxian Niqiao Bridge in the north and the strange peaks of Sangong Mountain in the south.