Rhetoric and puns. Setting off is not a rhetorical device.
The forms of expression include: narration, discussion, description and lyricism.
Expression techniques: foil includes positive contrast and negative contrast; Dynamic and static combination; Description of personal data; Symbolism; Want to promote suppression before promotion, suspense, bedding, bedding, etc.
Lyric ways: borrowing scenery, borrowing things to express feelings, expressing feelings with scenery, blending scenes, expressing feelings directly, etc.