Introduction to Tianjing Spring: Tianjing Spring, also known as Jiangjiachi, is located at the southern end of Wulongtan. It is named because the spring water is clear and bright, and the sun, moon, nebula, and clouds are reflected on the water like a mirror hanging from the sky. The spring pool is 14.5 meters long, 13.6 meters wide and 1.4 meters deep. It is the second largest spring in the Wulongtan spring group. The spring water rarely dries up. Strings of bubbles emerge from the bottom of the pool, bursting on the surface and forming beautiful ripples. Green algae floats in the pool, and fish swim up and down like shuttles.