Sanggan River, one of the mother rivers of the Chinese nation, flows through Wangjiawan Township, Xuanhua District, Zhangjiakou City, Hebei Province. Mountains rise and fall, and mountains and rivers depend on each other. There is a group of Taoist caves in the deep mountains, with exquisite design and exquisite carving skills, hidden in the mountains-Xiangguang Cave. Xiangguang Cave is 28 Taoist temples built on the mountain, all of which are embedded on the cliff more than 500 meters high on the east bank of Sanggan River. It is a grotto Taoist temple built on a cliff. Xiangguang Cave was built in the Northern Wei Dynasty. In the long historical development process, it has been abandoned several times and reborn several times. It is a collection of religious culture and a long scroll of religious culture, which shines in the long river of years.