Introduction to Longquan: Located in the Longquan Pavilion under the back of Qinglong, the spring is 3 meters deep and crystal clear. It never dries up all year round. It is sweet and refreshing. It contains selenium, arsenic and other trace elements. It can clear the spleen and moisturize the lungs, and is of great medicinal value. high. Every summer and autumn, the spring water overflows, merges with the water curtain waterfall, and flows into Yingrui Pool.