Zhao Gao was a great calligrapher in Qin and Han Dynasties. In Xu Shen's Preface to Explaining Characters in the Eastern Han Dynasty, he said: "Zhao Gao wrote" Love Calendar ",took the stone book and printed it, or changed it quite." There are 59 calligraphers in Wang Qing's Annals of Ancient and Modern Characters, including Zhao Gao. In the Southern Song Dynasty, Yang Xin called Zhao Gao a "good seal character" in "The Name of Ancient Books". Shu Duan of Tang Dynasty was published in Da Zhuan: "Zhao Gao is good at seal cutting. Teach Hu Hai, the youngest son of the emperor. " He is the author of six chapters.