Introduction to Dongshan Jianfeng: "Dongshan Jianfeng" is an island in the center of Yansai Lake. Here, two streams of the Shihe River converge in front of the mountain to form a deep pool. The upper half of it is a cliff with steep green peaks. There is a natural stone cave on the mountainside, which is unpredictable and deep, where snakes and pythons often appear. The cliff below the cave is on the verge of an abyss, and there is a woodcutter's path leading to the top of the mountain.