Huayan National Forest Park is situated in the Red Shuanglin Sound on the north bank of the Feiyun River in Ruian City. It is a tourist resort featuring forests, waterfalls, Bitan, and Kistler. The park is the golden hub of the tourism route in south Zhejiang. The Huayan scenic area is known for its dense forests and Bitan silver waterfalls. It is commonly known as the "9 pools". There is not only the Nine Pool Waterfall, but also the Tianwai Waterfall. The third pool is a relatively beautiful pool in Jiutan. The shape is round and it is the place where the lake water seems to be not shows where it goes and where it is deep, there is no gentleness, no transition, It is not dragging water, so the pool of water is like a piece of cut green glass that is quietly set in this mountain.