Tiangongyuan Introduction: It is located in Tiangong Township, 20 kilometers south of Langzhong City. It was first built in the Tang Dynasty and rebuilt in the third year of Tomorrow Shun. It was built in memory of astronomers Yuan Tiangang and Li Chunfeng in the Tang Dynasty. There are original Wanniantai, Niuwang Pavilion, main hall, Guanyin Hall and other buildings. The main hall has a gable-shaped roof with double eaves and a platform beam roof truss. The materials are thick. The Guanyin Hall is three rooms wide and three rooms deep. It is of stacked beam type and through-beam style. A building that combines bucket structure. Both temples are now well preserved, covering an area of 6 acres and a construction area of 684 square meters.