What is the meaning of "Fu" in the title of a poem?

Fu is a style in ancient China, deeply influenced by Chu Ci. It pays attention to literary talent and rhythm, has the characteristics of poetry and prose, and mainly writes scenery, usually by borrowing scenery to express feelings. It is between poetry and prose, and closer to poetic style. For example, Longmen Fu, Epang Palace Fu and Preface to Wang Tengting are all very classic works.