First-class title: the title number is "I", No.4 is in bold, exclusive, and there is no punctuation at the end.

Second-level title: the title serial number is "(1)", which is the same as the font size of the text, and it is a dedicated line with no punctuation at the end.

Third-level title: the title serial number is "1." , the same size and font as the text.

There are also four or five titles;

Four-level title: the title serial number is "(1)", which is the same as the text size and font.

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

Theoretically speaking, titles should pay attention to the beauty of accuracy, distinctiveness, conciseness, form and rhythm. Headlines written in the past are really neat, beautiful and literary, and news headlines of 2 1 century also have the characteristics of being colloquial and unconventional, paying little attention to neatness and symmetry, and three complete headlines are rare.

Extended data:

Requirements for the title:

1, the title should be clear. It is necessary to reveal the scope or argument of the topic, so that people can know the general outline of the article, the main content of the discussion and the author's writing intention after reading the topic, instead of specious, hiding the head and revealing the tail, and playing hide-and-seek with readers.

2. The title should be concise. The topic of the paper should not be too long. If it is too long, it will make people feel cumbersome and cumbersome, and they will not get a clear impression, thus affecting the overall evaluation of the article. Don't be too abstract and empty, and don't use very useful or invented words in the title, so as not to make readers feel like a sea of smoke when they see the title, and they can only understand it after reading the text completely.

3. The title should be novel. The title, like the content and form of the article, should have its own uniqueness. Not unconventional, unconventional, fascinating and pleasing to the eye, thus arousing readers' interest in reading.

Baidu Encyclopedia-Title