Introduction to Sanxian Peak: In the spring of 1934, the famous modern writer Yu Dafu climbed to the top of Dongtianmu Mountain opposite. He wrote a poem: "Looking at Qiantang from the top of Immortal Peak, phoenixes are dancing and dragons are flying, and the breasts are long. What a wonderful sunset in the golden powder. The mountains are rich in purple and the rivers are yellow. "Standing in Feilong Ridge, which is just across from the Immortal Peak, I believe that tourists have many similarities with the scene written by the poet back then.