If it's manual. The secondary title should also be blank.

The first-level title is in Song Ti No.3, with two spaces and bold; The second-level title uses four words in Song Ti and two words in empty bold; The title of the third and fourth grades is Song Zixiao No.4, and the two words are empty and bold; The text is in Song Dynasty, and the line spacing is 1.5 times.

First-class and second-class titles, references, appendices, acknowledgements, etc. The word "directory" is bold and needs to be centered. The first-level and second-level titles in the catalogue are in font No.4, which need not be bold, and are generally generated by computer.

Paper format:

1, English titles are mainly in the form of phrases, especially noun phrases, that is, titles are basically composed of one or more nouns plus their prepositions and/or postattributes; The title of phrase type should determine the head word and then modify it before and after. The order of each word is very important, and improper word order will lead to inaccurate expression.

2, generally do not use declarative sentences, because the title mainly plays a marking role, and declarative sentences are easy to make the title have judgmental semantics, not refined, not eye-catching. In a few cases (critical, comprehensive and refuting), the question can be used as the title, because the question has an exploratory tone and is easy to arouse the reader's interest.

3. The English title and Chinese title of the same paper should be consistent in content, but it doesn't mean that the words should correspond. In many cases, individual non-material words can be omitted or changed.