The lines of a play generally include dialogue, monologue and narration. In China opera, it is a comprehensive application of rhyming lyrics and Sanqu chanting. Opera aria is a musical artistic language, which can be divided into three forms: prose and verse.

Dialogue is the dialogue between characters in the script and the main form of drama lines.

A monologue is a line spoken by a character alone on the stage. It developed from classical tragedy and was widely used in Renaissance drama. It is an artistic means to pour out the inner feelings and thoughts of the characters directly to the audience, and is often used in the most intense and complicated scenes of the inner activities of the characters.

Narrator is a line that the character speaks directly to the audience on the stage, assuming that it is not heard by other characters on the same stage. The content is mainly the evaluation of the other party and the disclosure of my inner activities. In China traditional opera, "cheating on marriage" is a narrative.