Generally speaking, there are three different literary forms.
Poetry can be traced back to The Book of Songs, but it was a four-character poem at that time. Later, it developed into Yuefu, ancient poetry and modern poetry. Yuefu can sing in unison. Classical poetry doesn't pay much attention to meter. Modern poetry pays attention to metrical poems, which are divided into metrical poems and quatrains (five words and seven words, six words, but few). Poetry reached its peak in the Tang Dynasty, so it is called Tang Poetry.
Ci began in Nanliang during the Southern and Northern Dynasties in China, formed in the Tang Dynasty and reached its peak in the Song Dynasty. You can sing along with the tune, so that you have a epigraph. Also known as long and short sentences, as the name implies, different from poetry, sentences have lengths.
It should be noted that since Yuefu is a kind of vocal poetry, all poems that can be sung in the future can be called Yuefu. Therefore, Yuefu is not only a poem with the same word and style, but also a poem with the same long and short sentences, such as Dongpo Yuefu of Su Shi and Xiaoshan Yuefu of Zhang Kejiu. So there are two kinds of Yuefu. Although the word Yuefu is called Yuefu, it is far from the early Yuefu and cannot be confused.
Fu, originally a writing technique, is interpreted as foreshadowing, which refers to the technique of foreshadowing and expressing one's wishes. At the end of the Warring States Period, Fu Pian written by Zhao people was originally named Fu, and Fu began to be used as a stylistic name. Han people called Qu Yuan, Song Yu's Ci and Xun Qing's Fu together, and saw the close relationship between them, and regarded Qu Yuan as the ancestor of Ci and Fu. They tend to be prosaic and often use the neat syntax of parallelism and duality, which is both free and cautious, and has the nature of poetry and prose. Generally speaking, the evolution of Fu has gone through different stages, from Qu Yuan's and Song Yu's Sao Fu to Han Fu represented by Jia Yi, Mei Cheng and Sima Xiangru. In Wei, Jin, Southern and Northern Dynasties, parallel prose and Fu Qin prevailed, and in Tang Dynasty, the special law fu for imperial examinations prevailed, while prose fu tended to be dull in Tang and Song Dynasties.
This is probably more clear.
References:
zh.wikipedia.org