Lun Shuo is an argumentative style in ancient China. According to the rhyme, "those who discuss must discuss". "Selected Works of Zhaoming" said: "There are two theories. One is the theory of history, which is the judgment of good and evil made by loyal ministers at the end of biographies. For example, after Historical Records, Tai Shigong said ... The second is political theory, so it is fallacious for bachelors and doctors to talk about ancient and modern figures or comment on history. " For example, The Six Kingdoms and Guo Qin. China ancient paper has a long history. The essays of pre-Qin philosophers, such as Mencius and Han Feizi, are actually essays. Later, people divided essays into essays, essays, arguments, originality and so on. Theory is to judge things, including politics, history and learning, and it focuses on reasoning. Judging from the existing literature, Jia Yi's On Qin is the earliest famous work.