Introduction to Longyan Spring: There is a spring on the left and right sides of Longtou Peak, which is said to be the left and right eyes of a giant dragon. The right eye spring keeps gushing water all year round and makes a sound like the sound of a piano, so some people call it "Qinquan Qingyin". The spring in the left eye has dried up, and only a little red "blood" will flow out during the rainy season. Legend has it that the water of Longwan leads to the East China Sea and is the place where the Dragon King's three princesses bathed. The Dragon King was worried, so he sent a giant bar to lie on the edge of the bay for protection. The dragon's eyes formed two springs on the left and right.