The word "table of contents" has two spaces in the middle and two small bold faces, with a spacing of 0.5 lines after the first paragraph; The main text is in the Song Style of No.4, aligned to the left, with 0, 1.5 times line spacing before and after paragraphs.

Text title: 1 level title: bold No.4, 0.5 line before the paragraph and 0.5 line after the paragraph; Secondary title: Song typeface black, small No.4, 0.5 line before the paragraph and 0 line after the paragraph; Third-level titles: italic GB23 12, No.4 Xiao, TimesNewRoman；; Text: Song Zixiao No.4, the first line is indented, 1.5 line spacing. In the introduction and text, where documents are quoted, 123 should be marked in brackets [] after the quoted sentence, and a mark should be added.

Extended data

Conclusion: The conclusion should be clear, concise, complete and accurate. It is the final and overall conclusion, not a simple repetition of the summary of each paragraph in the text.

We should carefully explain the position and role of our creative work in this field, the significance of our new ideas, and also put forward suggestions, research ideas, suggestions for improving instruments and equipment, and problems to be solved in the conclusion.

References: All references should be placed at the end of the article, and their writing formats should be marked with single letters according to GB3469-83 "Document Types and Document Carrier Codes": M monographs, C papers, N newspaper articles, J journal articles, D dissertations, R research reports, S standards and P patents.