1. Optimize language expression: arrange the sentences in the paper, remove redundant words, simplify the sentence structure and improve the precision of expression. At the same time, pay attention to replacing some common words with synonyms to increase the length.

2. Increase references: Cite research literatures in related fields to supplement and improve their own exposition. However, we should pay attention to ensure that the cited documents are closely related to the theme of the paper and avoid introducing irrelevant content.

3. Detailed explanation of data and charts: The data and charts obtained in experiments or investigations can be analyzed and explained in detail in order to show the research results more comprehensively.

4. Add an appendix: You can attach some detailed data, calculation formulas and algorithms to the appendix of the paper to increase the length of the paper.

5. Expand the structure of the paper: for example, the research background can be introduced in more detail in the introduction, or the research results can be discussed in depth in the conclusion.

6. Expand keywords: add some words related to the topic of the paper to the keyword list to increase the search scope and exposure of the paper.

7. Invite experts to review: consult experts or scholars in related fields, listen to their opinions and suggestions, and revise and improve the paper according to their feedback. This can not only increase the number of words in the paper, but also improve the quality of the paper.

8. Attend academic conferences: By attending academic conferences, you can make speeches and communicate at the conferences and share your research results. This can not only increase the number of words in the paper, but also improve the influence of the paper.