Tian Ren was the secretariat of Yizhou for five years, and moved to Xinjiang in February of the 28th year of Kaiyuan. During his tenure in Yizhou, he was "simple but able to break, excellent in strategy and vulgar in people". When he was transferred, local officials and people cried sadly. Eight months after Tian was transferred, that is, in 740 10, with the permission of the imperial court, Yizhou officials and people specially published Tian Dezheng Monument (located in Guhetang, Baoding) to commemorate his political name and official voice. Author Su Lingzhi was a famous calligrapher and martial artist in Shaanxi during the Kaiyuan and Tianbao periods in the Tang Dynasty. He was a clerk in Yizhou and joined the army around 750 AD. His brushwork is vigorous, dignified, beautiful and elegant, comparable to that of Li Yong, a contemporary calligraphy master, and Yan Zhenqing, a magistrate in Pingyuan, and was praised by Ouyang Xiu as "a famous stele writer in the Tang Dynasty". At that time, some people commented that Su's calligraphy was "based on Beihai (Li Yong) and Taishou (Zhenqing)", while later generations called it "the head of the family", which shows that his calligraphy attainments have reached a new height. There are not many calligraphy works handed down from generation to generation by Su Lingzhi, but his inscriptions, such as Ode to an Iron Statue, Monument to a Dream, Monument to Tian Dezheng, and Fanyang's Ode to the Tower of Minzhong Temple, have always been regarded as fine works and have been listed as national cultural relics. The building is about seven meters high and has a pavilion on it, which consists of three parts: the top, the main body and the seat. It is octagonal and divided into three sections. From one side to seven sides, the original text of the Tao Te Ching in regular script and the sentence-by-sentence annotation of the Tao Te Ching in Tang Xuanzong are all engraved in yin. At the beginning of the first face, there are 16 Chinese characters, each with a height of 10.3 cm and a width of1/0.2 cm, engraved with the seal script "The Book of Tao Te Ching written by SHEN WOO, Emperor Taizong". The first half of the eighth face is written with the sentence "In the twenty-seventh year of Tang Dynasty, on the fifth day of the month in Central South Lu, the doctor of Emperor Wu San sent the army from his brother to defend the secretariat of Xingzhou in Xingzhou and found the country". In the middle of the eighth face, in the year of the end of the Great Song Dynasty (988), He You, Li wrote the Record of Reconstruction of Longxing Road in Xingzhou. The lower part of the eighth face is the record made by Duan in October of the 18th year of Qing Daoguang (1838) and the record made by Lingmiao in Xingtai County in the 28th year of the Republic of China (1939) to raise funds to build a pavilion.