Talk about your understanding of ancient poems and songs?

Poetry has the tradition that "the hungry sing about their food, and the laborers sing about their things", as the saying goes, injustice will sound. Poetry is the voice of the poet's feelings and the sustenance of life. Few people write poetry just for the sake of writing poetry. For example, when a poet is homesick, there will be a sentence like "Looking up, I found it was moonlight, and then sinking, and I suddenly thought of home". Feeling the difficulties of the world and worrying about the greatness of the world, there is a "long sigh of relief to cover up tears and lament the suffering of the people's lives." There are also people who express their talents and feelings ... countless.