After breakfast, go to the first attraction, Libo Xiaoqikong, Libo County, Buyi and Miao Autonomous Prefecture, Nanbu. From the west gate, enter the scenic spot, and go down the road. The first thing you see is Wolongtan. Wolongtan is located in a karst dark river - the outlet of the Wolong River, the reason why it is called the "dark river" is because its outlet is at the bottom of the cliff of the deep pool, it is said that even when the flood is, the flood at the bottom of the mountain roars and flows, The water surface of Wolongtan is still calm like a mirror. The scenery is especially better than Jiuzhaigou. The water color of the pool is light blue, bright blue, and dark blue in the light of cloudy sky. It is like a sapphire, "a sapphire on the belt of the earth". This is obviously describing the water of Wolongtan.