Similarities and differences between The Book of Songs and Yuefu poems

The Book of Songs is the earliest collection of poems, also known as 300 Poems. Its style is part of the lyrics of popular music at that time (haha), and the lyrics that appeal to both refined and popular tastes are very heavy for official music, while Yuefu poetry is music collected or created by musicians at that time, but its style is more advanced than the Book of Songs (in terms of time).