Qinglongtan is like a gourd, and its water is like jade. At the north entrance, there are cascading waterfalls that sound like a grand bell, and the sound of the canyon echoes. This pond is named Qinglong Pond because there are green dragons playing in the water. It is also said that Changsun Wuji, who was sent here, often came to the pond to watch the waterfall and looked north at his homeland. There is a poem here that goes, "Nong'a's family lives under the morning song and has been famous for a long time. We come together to swim on the Qi River, and our old love grows." Therefore, this place is also called "Dragon Singing Waterfall".