Introduction to Liuyi Pines: In front of Toutian Gate, there are six Taishan Pinus pine trees, all of which are more than 500 years old. The six ancient pines have an ancient, clumsy and proud shape, and are content and content, as if they have the spirit of an immortal. During the Kaiyuan period of the Tang Dynasty, Li Bai traveled to Mount Tai, and later lived in seclusion in Zhuxi, Mount Culai, together with Kong Chaowen, Han Zhun, Pei Zheng, Zhang Shuming, and Tao Gai. The world called it "Liuyi of Zhuxi". Liuyi of Zhuxi expresses his love for the mountains, rivers, springs and forests, with wooden gates, lofty houses, orchids and various flowers. Due to nature, the wind is high and the dust is clear. These six ancient pines are named in commemoration of "Liuyi".