Argumentative writing is an expression in which the author analyzes, comments and persuades objective things to show his views, opinions and attitudes. It usually consists of three parts: argument, argument and argumentation. Thesis topics are divided into topics, arguments and implications. The topic type is the author's point of view but concise, and the central argument cannot be copied directly. Argumentative and argumentative types generally have no opinion tendency, for example, a friendship between gentlemen is as light as water. Implication generally coexists with the theme argument and cannot be directly used as the central argument to restore the original intention.