Han Feizi, Wade-Giles romanization Han Fei-tzu, Chinese ‘Master Han Fei’ (c. 280- 233 BCE), was the greatest of China’s Legalist philosophers. His essays on autocratic government so impressed King Zheng of Qin that the future emperor adopted their principles after seizing power in 221 BCE. The Hanfeizi, the book named after him, comprises a synthesis of legal theories up to his time.
– britannica.com