2. Rhetoric methods: there are mainly metaphor, analogy, pun, duality, exaggeration, metonymy, questioning, thimble (mostly in songs or words) and so on. Its characteristics and usage are roughly the same as those in modern literary works.
3. Other commonly used expression techniques: contrast, which directly expresses the mind, expresses feelings through scenes (scene blending), expresses feelings through objects (voice or symbol through objects), expresses feelings through things, expresses reason through scenes, satirizes the present through the ancient times, combines the reality with the reality, combines the dynamic and static, and contrasts (dynamic and static contrast, sadness and music contrast or sadness and music contrast).
Some of the above categories overlap, such as "direct lyric" in the first category is another way of saying "direct expression of feelings" in the third category; In the third category, "borrowing scenery to express feelings (including scene blending), borrowing things to express feelings, borrowing things to express feelings, and integrating scenery" all belong to the first category of "indirect lyric". When appreciating, if there is no clear appreciation type or angle in the topic, we only need to express it according to one type or from one angle.