Li Si, surnamed Li, Ming Si, has an ancient word. Politicians of the Qin Dynasty. At the end of the Warring States Period, a native of Shangcai (now southwest of Shangcai, Henan Province) was born in Chu. In his early years, he was a small official in the county. Later, he came to Xunzi to learn the art of emperors and entered the Qin Dynasty. At first, he was regarded as Lang, and then he persuaded the King of Qin to destroy the princes and proclaimed himself emperor, and was appointed as a long history. The king of Qin adopted his strategy and sent advisers to lobby the six countries of Kanto with precious jade, alienating the princes and ministers of various countries and letting them live as guests. In the tenth year of the King of Qin (237 BC), he ordered the expulsion of six guest ministers. Li Si's "Persuade to Expel" stopped it, which was adopted by the Qin government, and soon the official arrived at Ting Wei. It played a great role in the cause of unifying the six countries in the Qin Dynasty. After Qin unified the world, he agreed with Wang Wan and Feng Jie to respect Qin as emperor, and formulated relevant etiquette systems. Be appointed as prime minister. He suggested tearing down the county wall, destroying folk weapons and strengthening the rule of the people; Oppose the enfeoffment system and adhere to the county system; He also advocated burning poems, books and hundreds of languages collected by the people, and forbidding private learning in order to strengthen autocratic and centralized rule. He also participated in the formulation of laws to unify the system of tracks, characters and weights and measures. After the death of Qin Shihuang, he conspired with Zhao Gao to forge a will, forcing Fu Su, the eldest son of the first emperor, to commit suicide, and made Hu Hai, the youngest son, the second emperor. Later, Zhao Gao was jealous. In the second year of Qin Ershi (the first 208 years), he was beheaded in Xianyang City, and the three clans were conquered.