Introduction to Qinglong Cave: Qinglong Cave is a natural karst cave that has been inhabited by humans as early as the Spring and Autumn Period. The paths inside the cave are winding and deep, confusing and difficult to distinguish. It is divided into 3 halls and 4 small halls, with the largest area of ​​200 square meters. meters, among which the Dragon King's Palace is the most distinctive. There are karst landscapes in the palace such as "Dinghai Shenzhen", "Dragon Worship", "Water Curtain Dragon Bed". The main road that has been proven is 1,000 meters long. There is an underground river a thousand meters away. The sound of flowing water below can be heard.