The function of citation is to make the argument conclusive and sufficient, to make it more persuasive and enlightening, and to make the language concise, implicit and elegant.

In order to make the language more convincing and authoritative, and enhance the literary beauty and cultural content, some famous quotes are often quoted. Famous quotes are classic works and authoritative remarks, generally including famous quotes, aphorisms, aphorisms, ancient poems, etc. In argumentative essays or comprehensive essays, the author often quotes famous quotes as theoretical arguments to demonstrate his or her point of view. The author uses the argument as the commander and always serves the argument. Generally speaking, quoting famous quotes at the beginning of an article can provide an outline, lead the whole article, be fascinating, and set the tone for the entire article. Quoting famous quotes in the article can make the arguments conclusive and sufficient, enhance persuasiveness when explaining problems and clarifying opinions, and has the functions of highlighting the center, being enlightening, and refining the language.