The main viewpoints are: Enlightenment; Poetry has six meanings, one is wind, the other is fu, the third is comparison, the fourth is prosperity, the fifth is elegance, and the sixth is ode. There is also "emotion moves in the middle, which is shaped by words and is insufficient, so it is lamented."
According to the literary criticism theory in Preface to Mao Poetry, literary works can be used by rulers to educate people.
Poetry has six meanings, which are divided and described from the aspects of poetry style, emotion and problems.