It is said to be a strategy classic written by Gui Guzi, the founder of political strategists, focusing on the art of lobbying and adapting to the world. The whole book revolves around "reading emotions", "inquiring into ideas" and "strategy", explaining the skills of discerning people's hearts and acting according to the situation, emphasizing that "nothing is difficult to plan because of thoroughness, and nothing is difficult to say but listening carefully". As a compulsory book for ancient politicians, its wisdom is not only applicable to diplomacy and military affairs, but has also been widely used in modern management and negotiation fields.
