1. Space and time should be highly concentrated. Drama is different from novels and essays, and is not limited by time and space. It takes time, characters, plots and scenes to be highly concentrated on the stage.

2. All kinds of literary works should express social contradictions and conflicts, while drama requires that the contradictions and conflicts reflected in limited space and time be sharper and more concentrated.

3. The language of drama is mainly lines. Lines are the lines of the characters in the play, including dialogue, monologue and narration. Monologue is a text in which characters express their personal feelings and wishes; Narrator is what a character says to the audience from the side on the stage, and other characters are behind him.