The paper must have an introduction. Used at the beginning of the paper. The introduction should generally write the author's intention, explain the purpose and significance of the topic, and point out the scope of the paper writing.

The introduction should be short and concise, and stick to the theme. It is forbidden to write what appears in the introduction into the abstract. Don't copy the subtitle (table of contents) or conclusion of the paper, and don't interpret the content of the paper.

The introduction requires that the title of the paper can accurately express the content of the paper and properly reflect the scope and depth of the research. Common faults are: too general, the topic is not deducted. The key problem is that the topic should be closely related to the content of the paper, or that the content of the paper should be closely related to the topic, that is, the topic should be deducted and the article should be deducted. This is the basic principle of writing a thesis.