Han Fei (approximately 280 BC - 233 BC) was a Korean aristocrat. He was a "study of the famous magic of joyful punishment". Later generations called him Han Feizi. Both he and Li Si were disciples of Xunzi. At that time, South Korea was very weak and was often bullied by its neighboring countries. He repeatedly proposed strategies to become rich and powerful to the King of Han, but was not adopted by the King of Han. Han Fei wrote a series of articles such as "Gu Anger" and "Five Worms", which were later collected into the book "Han Feizi". King Yingzheng of Qin read Han Fei's article and admired it very much. In 234 BC, Han Fei came to Qin as an envoy from South Korea and wrote to the King of Qin, urging him to attack Zhao first and delay the attack on Han. Li Si was jealous of Han Fei's talent, and worked with Yao Jia to frame him, and Han Fei was forced to commit suicide by taking poison. Han Fei pays attention to the study of history and believes that history is constantly developing and progressing. He believed that if today's people still praise "the ways of Yao, Shun, Tang, and Wu", "the new sages will surely laugh." Therefore, he advocated "do not revise the ancients, and it is always possible to break the law", "when the world changes, things will change" and "when things change, prepare for changes" ("Han Feizi·Wu Zhu"), and policies should be formulated based on today's reality. His view of history provided a theoretical basis for the reform of the landlord class at that time. Han Fei inherited and summarized the thoughts and practices of Legalism during the Warring States Period, and put forward the theory of centralized monarchy. He advocated that "things in the four directions must be in the center; when the saints insist, the four directions will follow suit" ("Han Feizi: Property Rights"), the power of the country must be concentrated in the hands of the monarch ("sage"), and the monarch must have the right to have Only with power can one govern the world. "The lord of thousands of chariots is the king of thousands of chariots. Therefore, those who control the world and conquer the princes use their power and power" ("Han Feizi: Renzhu"). To this end, the monarch should use various means to eliminate the hereditary slave-owning nobles, "disperse their parties" and "seize their assistants" ("Han Feizi·Zhudao"); at the same time, select a group of feudal officials who have been trained in practice to replace them, "The prime minister must be from the state department, and the fierce general must be from the army" ("Han Feizi Xian Xue"). Han Fei also advocated reform and the implementation of the rule of law, calling for "abolition of the teachings of the previous kings" ("Han Feizi·Wen Tian") and "taking the law as teaching" ("Han Feizi·Wuzhe"). He emphasized that when "laws" are formulated, they must be strictly implemented, and no one should be exempted from them, so that "the law is not noble", "the ministers will not be spared from punishment, and the good will be rewarded" ("Han Feizi·Youdu"). He also believed that only by implementing severe punishments could the people obey, society be stable, and feudal rule be consolidated. These ideas of Han Fei reflected the interests and demands of the emerging feudal landlord class, and provided a theoretical basis for ending the feudal separatism and establishing a unified centralized feudal state. Many of the political measures taken by Qin Shi Huang after he unified China were the application and development of Han Fei's theory.