Confucius said, "Poetry can be numerous and impressive". What function does literature emphasize?

Confucius highly summarized the function of poetry in The Analects of Confucius: "Poetry can be interesting, observant, gregarious and resentful." Generally speaking, the theories of "xing", "outlook", "group" and "resentment" fully embody the characteristics of Confucius' poetics that emphasize the unity of individual psychological desire and social morality and ethics. Among them, "xing" and "resentment" emphasize the expression of the creator's emotional will. "Xing" means that the scenery or personnel in front of us have touched subjective feelings, and "resentment" is the catharsis of dissatisfaction. "View" and "group" are taken from different perspectives, mainly focusing on the function and significance of poetry. "View" is an observation overlooking or standing outside; "Group" is related to the interaction and communication between people, and it is a multidimensional aggregation of social, psychological, ethical and emotional relations.