Introduction to Yuantong Temple: In Erzhan, the only remaining ruins are now. There is a faintly discernible ink painting of Guanyin Bodhisattva mural on the cliff. The steles "Rebuilding the Yuantong Temple" written by Hongzhi of the Ming Dynasty and "The Story of the Seal of Zhangshiyan" by Wanli of the Ming Dynasty still exist. On the stone wall, there are cliff seal carvings of "Zhang Shiyan" by Qiao Yu, the official secretary of the Ming Dynasty. Today, the giant statue of Guanyin, the monument to the rebuilt Yuantong Temple, and the monument to the sealing of borders at Zhangshiyan have been listed as key cultural relics protection units in the county.