Analysis:
Poetry in the pre-Qin period is very different from later generations in form and content.
Poetry is one of the earliest literary forms, and there were ballads before the invention of writing-this is the ballad of oral literature. With the development of human language, real poetry appeared.
The earliest recorded poem should be The Book of Songs, mostly four-character poems, including two-character, three-character, five-character, six-character, seven-character and eight-character poems.
Two or three hundred years after the Book of Songs was the prose era, until the appearance of Qu Yuan. Qu Yuan's masterpiece is Li Sao, and later generations call the same poem as Li Sao "Sao Style" or "Sao Style Poetry", also known as "Chu Ci". Sao-style poems are characterized by the extensive use of the word "Xi". Sao-style poems opened up a development path with "three-character structure" as the main body for the later May 7th poems.
Five-character poems in the Western Han Dynasty and the Eastern Han Dynasty continued to develop and were adopted as Yuefu. The appearance of Nineteen Ancient Poems written by an unknown person at the end of the Eastern Han Dynasty marked the development of five-character poems to a mature stage. The rise of seven-character poems was basically the same, and it was not until Cao Pi's Ge Yanxing came out that seven-character poems were formally established. But it was not until more than 200 years later, after Liu Yujian's Song in the Southern Song Dynasty, that the seven-character poem was popularized and matured.
Qi, Liang and Chen are the periods of the formation and development of new poetry. The so-called new poetry is mainly characterized by its emphasis on rhythm and duality. Because this new style poem was first formed in the Qi Yong period of the Southern Dynasty, it is also called "Yongming Style". More refers to five-character poems, requiring the duality of meter, which makes the article cadence and rhyme beautiful. This theory is called "Yongming's Theory of Rhythm".
In the early Tang Dynasty, the poetic world was basically shrouded in the elegant and exquisite style of palace poems in the Southern and Northern Dynasties. A large number of talented poets appeared in the prosperous Tang Dynasty, who combined modern poetry since the early Tang Dynasty with generous feelings and reached the perfect state of paying equal attention to rhythm and style. During this period, metrical poetry was basically mature, and it was strictly required to be even, rhyming and antithetical. Even if sometimes we can't fully meet the requirements of leveling, rhyming and antithesis, we must follow certain requirements, that is, pay attention to "difficult to save."
In addition, the genre of poetry is generally divided into ancient poetry and modern poetry. Modern poetry generally refers to metrical poetry and pays attention to "words, sentences and rhymes". Classical poetry is relative to modern poetry, including ancient poems written by poets in Tang and Song Dynasties and later, as well as Yuefu poems.