There is a traditional norm in English typesetting, that is, the first line at the beginning of a paragraph should not be left, but should be indented with certain spaces to distinguish it from ordinary words and make the article more organized and easier to read.

The topic should be less than 20 words, which can express the specific content of the paper concisely, concretely and accurately. Subtitles can be used if necessary. It must include four parts: purpose, method, result and conclusion. It should be concise, the grammar should be rigorous and accurate, the keywords should be extracted from the article, and the words should be standardized.