The Han Feizi (Chinese: 韩非子) is an ancient Chinese text attributed to foundational political philosopher,"Master" Han Fei. It comprises a selection of essays in the "Legalist" tradition on theories of state power, synthesizing the methodologies of his predecessors. Its 55 chapters, most of which date to the Warring States period mid-3rd century BC, are the only such text to survive intact. Easily one of the most important philosophical classics in ancient China, it touches on administration, diplomacy, war and economics, and is also valuable for its abundance of anecdotes about pre-Qin China.
Han Fei's writings were very influential on the future first emperor of China, Qin Shi Huang. After the early demise of the Qin dynasty, Han Fei's philosophy was officially vilified by the following Han Dynasty. Despite its outcast status throughout the history of imperial China, his political theory continued to heavily influence every dynasty thereafter, and the Confucian ideal of a rule without laws was never again realized. Shu Han's chancellor Zhuge Liang demanded emperor Liu Shan read the Han Feizi for learning the way of ruling.