Han Fei (280 BC-233 BC) was a nobleman in South Korea, who was "fond of learning the name of criminal demons" and later called him Han Feizi. He and Reese are both disciples of Xunzi. At that time, South Korea was very weak and was often bullied by neighboring countries. He repeatedly put forward plans for prosperity to the king of South Korea, but they were not adopted by the king of South Korea. Han Fei wrote a series of articles, such as Lonely Anger and Five Cheats, and was later included in a book, Han Feizi. Ying Zheng, King of Qin, read Han Fei's article and praised it. In 234 BC, Han Fei came to Qin as an envoy of South Korea and wrote a letter to the king of Qin, urging him to attack Zhao first and slow down Korea. Reese was jealous of Han Fei's talent and tried to frame him with Yao Jia. Han Fei was forced to commit suicide by taking poison.

Han Fei pays attention to the study of history and thinks that history is constantly developing and progressing. He believes that if today's world is still praising "the Tao of Yao, Shun, Tang and Wu", "it will be a smile of the new saints". Therefore, he advocated that "we should not take it by surprise to repair the ancient times", "things are different when the world is different" and "things are different when things are different" (everything is wrong), and policies should be formulated according to 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 legalists in the Warring States period, and put forward the theory of absolute monarchy and centralization. He advocated that "things are in the quartet and in the central government; Sages insist on everything, and all directions will work "(everything is wrong, property rights are right). The power of the country should be concentrated in the hands of the monarch ("saint"), and the monarch must have the power and influence to govern the world. "The master of thousands of riders is the king of thousands of riders, so those who control the world and levy princes will also use their power" (everything goes wrong, the master of people). To this end, you mainly use various means to eliminate hereditary slave owners and nobles, "disperse their party" and "seize their auxiliary" (everything goes wrong, the main road); At the same time, select a group of feudal officials who have been trained by practice to replace them. "The prime minister must start from the state department, and the valiant soldier must be sent away" ("Han Fei Zi Xian Xue"). Han Fei also advocated reform and the rule of law, demanding "abolishing the former king's teaching" (Han Feizi Tian Wen) and "teaching by law" (Han Feizi Wu Note). He stressed that a "law" must be strictly enforced, and no one can be an exception, so that "the law is not expensive", "don't avoid officials after punishment, be good and leave behind" ("everything is enough"). He also believes that only by imposing severe punishment can people obey, society be stable and feudal rule be consolidated. These propositions of Han Fei reflected the interests and demands of the emerging feudal landlord class, and provided a theoretical basis for ending the vassal regime and establishing a unified centralized feudal country. After Qin Shihuang unified China, many political measures were the application and development of Han Fei's theory.