1. First-level title: the title number is "One, Two, Three", with Chinese characters and numbers, bold No.4, dedicated line, and no punctuation at the end.

2. Second-level title: the title numbers are "(1), (2) and (3)", with Chinese characters and numbers in brackets, the same font size as the text, dedicated lines, and no punctuation at the end.

3. Third-level title: The title serial number is "1, 2,3", using Arabic numerals, which are the same as the font size and font of the text.

4. Four-level titles: titles with serial numbers "(1), (2) and (3)" use Arabic numerals with brackets, which are the same as the font size and font of the text.

5. Five-level title: The title serial number is "①, ②, ③", which is the same as the font size and font of the text.

When writing the title, please pay attention to:

1, each level of title should start a new line. The format requires that the first line should be indented by 2 characters and the top box should be written.

2. Punctuation marks are not allowed at the end of the first-level title and the second-level title, and the first-level title is not bold.

3. When writing a paper, it is best not to copy and paste the title directly, which will easily lead to different typesetting, line spacing and fonts.

4. When typesetting, it is best to cancel automatic formatting.