The basic structure of the paper consists of three parts: preface, theory and conclusion. The preface and conclusion in the middle of the outline should be short. This theory is the focus of the full text, and it is the part to be written in pen and ink, so it should be listed in detail in the outline. This part should have at least two levels of standards, namely, in-depth and hierarchical reasoning, so as to reflect the organic combination of general argument and sub-argument, and make the argument thorough and thorough.