Introduction to Shiyan Cave: It is 12 kilometers away from Ciping. It is named after Shiyan (bats) that live in it all year round. It is a newly discovered large-scale lava cave. The cave is confusing, winding and deep. There are holes in the holes, and holes along the top and bottom. At present, it has been discovered that there are seven connected large holes and some small holes. The largest hole is like an underground auditorium that can accommodate a thousand people.