Introduction to Longwan Reservoir: There is a Longwan Reservoir at an altitude of 250 meters to the south of the main highway under Zhuanshanzi. Because there used to be a spring here, the spring water formed a pool, and the rocks beside the pool were patterned like dragons, so it was called Longwan. The southern hillside has green pine forests, and the north is connected to the black locust forest across the main road. The upper part is full of strange rocks, with the reflection of Kunelin Mountain as clear as a mirror. The water overflows the dam body and the waterfall is like a curtain.