Generally speaking, the application papers are divided into political papers, policy papers and review papers. All three types require clear views, complete structure, clear logic and smooth and standardized expression. The difference between the three is that political papers focus on "what is it", and the main task is to clarify the performance, causes, harm and influence of this problem. The policy document takes "how to do it" as the core, and its main task is to put forward targeted and feasible measures and programs; Comments focus on the analysis of "why", and the main task is to analyze phenomena or viewpoints and grasp the facts dialectically and comprehensively.