Niuxin Temple in Qingyin Pavilion, Niuxinling mountainside, altitude 958 meters. Niuxin Temple was originally named Yanfuyuan, Tang Huitong Zen Master changed his name to Woyun Temple, the hole is about 5 meters high, nearly 3 meters wide, and more than 5 meters deep. There are obvious traces of smoke and fire on the bottom and mouth of the hole. The grass on the hole wall is not raw so far. It is said that it is the reason for the long-term drug smoke.