Han Feizi (about 2865438 BC+0-233 BC), also known as Han Fei, was born in South Korea (now Xinzheng, Henan Province) at the end of the Warring States Period, and was a thinker, philosopher and representative of Legalism during the Warring States Period. He is the son of Han Wang Xie, a Korean royal family. According to Records of the Historian, Han Fei was good at "learning the name of criminal demons", and both Li Si, the prime minister of Qin Dynasty, were students of Xunzi. Han Fei's articles are outstanding, and even Reese sighs. His works are many, mainly included in the book Han Feizi. Han Fei was a materialist philosopher and legalist master at the end of the Warring States Period. He witnessed the poverty and weakness of South Korea at the end of the Warring States Period, and wrote to the king of South Korea many times, hoping to change the situation that governing the country at that time did not serve the rule of law, and helped the non-use, but his idea was never adopted. Han Fei thinks this is "an upright minister who can't tolerate evil." He retired from writing books, and wrote works such as Lonely Anger, Five Clues, Internal and External Existence, Talking about Forests, Talking about Difficulties, etc.