1. How many words is the preface of a paper?

The preface should not be too long. A paper of 3,000-5,000 words should generally be 200-250 words.

Second, the function of preface.

The main task of introduction is to outline the basic content and outline of the full text to readers. It can include all or several of the following five contents:

1. Introduce the background, significance, development and current level of a research field.

2. Review and summarize the literature in related fields, including previous research results and solved problems, and make appropriate evaluation or comparison.

3. Pointing out the unsolved problems and technical gaps left by predecessors, we can also put forward new problems, new methods and new ideas to solve these new problems, thus leading to the motivation and significance of our own research topic.

Explain the purpose of your research project.

5. Summarize the main contents of the paper, or outline its general outline.

It is not easy to arrange these contents reasonably and describe them clearly to readers in an orderly way. Experience tells us that the introduction is actually the most difficult part of the full text. This is because of the author's familiarity with related disciplines, whether the author's knowledge is profound or poor, what is the significance and value of the research, and so on. , are fully reflected in the introduction between the lines.