Heilongtan Park is an ancient scenic area located in the northern suburbs of Kunming City. Heilongtan Park is composed of ancient buildings and two scenic spots "Longquan Tanmei". Qingren Shuoqing titled "two trees plum blossoms a pool of water, four times misty rain half-mountain clouds", which is the park landscape characteristics. Legend has it that black dragons dive in the pool, so it is called black dragon pool. Longtan is divided into two pools before and after, separated by a bridge, a spring water is clear, a spring water is muddy, like the Taoist said that the "too-level map" of each half of Yin and Yang. The two springs are connected, but the fish in the two springs do not cross the pool, forming a strange landscape of "two water intersecting, fish do not travel".