Labor determines the characteristics of primitive literature: the trinity of poetry, music and dance. Because labor voice, labor action and labor voice are naturally formed in the process of labor, have the same rhythm and are inseparable from each other. Poetry, dance and music developed from these three are also sung together at the beginning according to a certain rhythm, such as Lv Chunqiu Ancient Music quoted above.
The trinity of poetry, music and dance represents the pursuit of spiritual realm by ancient literati. There is a preface to Mao's Ancient Poems: "A poet, who has aspirations, has aspirations in his heart, speaks as a poem, and his emotions move in the middle, which is not enough, so he sighs and sighs, so he sings and sings, but he doesn't know how to dance."