Generally speaking, the structure of argumentative writing can be divided into two types: horizontal argument and vertical argument. First, discuss horizontally (such as coordinate structure) to put forward the general argument, and then discuss the general argument in parallel from several aspects, that is, the discussion part consists of several parallel sub-arguments. Several parallel arguments are often placed at the beginning of each paragraph to show the hierarchy. Second, the vertical discussion (such as progressive structure) mainly adopts hierarchical structure, and each level of the article is: in-depth, step by step. The order of each layer has strict requirements and cannot be changed at will. Introduction (proposing arguments and topics) This paper is divided into arguments-what is it? Sub-argument-why? Argument-what should I do? Conclusion (refer to full text)