1, Discourse Coherence Theory: This theory holds that any element (such as time, space, topic, reference, etc.) is adjacent. ) may become a link between discourses, and the connection mode of discourses is suitable for their contextual information and purpose. In other words, to make a text coherent, there must be a closely related semantic relationship between adjacent texts.

2. Traditional rhetoric theory: this theory emphasizes the artistry and formal beauty of language expression, and thinks that the artistry and readability of the text can be improved through clever rhetoric and stylistic application. For example, parallel structure, repetition, duality, parallelism, repetition and other techniques can make the text more rhythmic and attractive, thus avoiding the break of the text.