Zhao Gao, originally a distant relative of the Qin imperial clan (a distant relative of the Zhao imperial clan), entered Qin Gong as a eunuch (the reference to Zhao Gao as a "eunuch" was misinterpreted by later generations), served as an official of CRRC House and concurrently served as an official of Fuxi, "having been in charge for more than 20 years". After the death of Qin Shihuang, he conspired with Prime Minister Lisi to forge the imperial edict, forcing Fu Su, the eldest son of Qin Shihuang, to commit suicide, and made Hu Hai, the youngest son of the first emperor, emperor for Qin Ershi and doctor. During his tenure, he monopolized power, used power for personal gain, taxed more, and his administration was more harsh. In 207 BC, he designed and killed Li Si, and then he was the prime minister of Qin State. The following year, he forced Qin Ershi to commit suicide and set up another sub-camp. He was quickly killed by Zi Ying, killing all three tribes.

In addition, Zhao Gao was also a great calligrapher in Qin and Han Dynasties. Xu Shen's Preface to Explaining Words in the Eastern Han Dynasty said: "Zhao Gao wrote" Love Calendar ",took the stone script and sealed it, or it was quite preserved." 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. Hu Nvshu, the youngest son of the first emperor. " He is the author of Six Chapters of Love Calendar.