The font format of the subtitle of the paper is as follows.

1. Subtitle of Chinese paper: Xiaoer, bold, centered under the main title, with dash in front of the text.

2. English paper subtitle: No.3, with the font "Times New Roman" in the center. English newspaper subheadings may or may not be preceded by English dashes.

3. English paper subtitles (No.3, "Times New Roman" font, centered, English paper subtitles may or may not be preceded by dashes in English).

4. The main title of the English paper (No.2, "Times New Roman" font, bold, centered)