The Han Feizi (Chinese: 韓非子; Old Chinese: *[g]ˤar pəj tsəʔ) 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 are the only such text to survive intact, most of which date to the Warring States period mid-3rd century BC. Though differing considerably in style, their coherency lends itself to the possibility that they were written by Han Fei himself. It is generally considered more philosophically engaging than the Book of Lord Shang. It is also valuable for its abundance of anecdotes about pre-Qin China.