Poems on Classics, written by Zheng Daozhao in the fourth year of Yongping (5 1 1), is located in the north of Yunfeng Mountain in Ye County, Jiaodong. The word is six or seven inches, which is a cliff word, about 300 words, which is quite spectacular. Compared with Monument to Zheng Wengong, his book is more vigorous, with brushwork, official script style, cursive script ups and downs style and regular script dignified style, which can be described as "the land of a cloud crane and a seagull". "Yu Shi" says: "Zheng Daozhao's inscriptions on the upper and lower peaks of Yunfeng Mountain, the classics and poems are the inheritance of seal script, which has transformed the northern Joe (Jiao Tong) wasteland and advanced towards civilization like a blue road light. His pen power can be used to kill dragons and snakes, but he can swim in vain, all by God's will. "
Due west, up and down, north and south