Firstly, according to the nature of research content and research methods, the paper is divided into theoretical papers, experimental papers, descriptive papers and design papers. Liberal arts students generally write theoretical papers, while science students generally write experimental papers, descriptive papers and design papers.

Second, according to the nature of the discussion, it can be divided into: establishing the topic and refuting the topic. Writing a thesis is to expound and demonstrate one's views and opinions from a positive perspective. Refuting a thesis refers to establishing one's own arguments and opinions by refuting others' arguments.

Thirdly, according to the size of the research problem, it can be divided into macro papers and micro papers. Macro-thesis has extensive research and influence. However, the micro-thesis studies specific problems and has a narrow influence.

Fourth, comprehensive classification: thematic and argumentative.

The investigation of the present situation is to select the most typical and telling materials from the first-hand materials, analyze them, reveal the essence of things or find out the inherent laws of things, draw correct conclusions and sum up valuable things, which should be paid special attention to when writing papers. I want to investigate the internet to make the investigation easier and more convenient.

The purpose of the current situation investigation is to explain the current specific state of the subject by collecting data and facts until the crux of the subject is found, thus providing a basis for setting the target value of the subject and analyzing the reasons. We should not only investigate the current situation, but more importantly, analyze the data obtained from the current situation investigation, classify it from different angles, analyze it layer by layer, and sort it out, so as to find the key crux of the problem.