The second is music-related Yuefu, and irrelevant Yuefu. This is a classification based on the nature of poetry. As far as the first classification system is concerned, each genre can be further divided into several details, which can be illustrated by a list. In the table, we can see that there are two categories: ancient poetry and modern poetry.
Under that ancient poem, we can further subdivide it into five-character poems and seven-character poems, and under that seven-character poem, we can further subdivide it into three genres: quatrains, metrical poems and parallel prose, and then we can further subdivide it into two details: pure seven-character poems and miscellaneous words.
As for the three genres of modern poetry? It can also be divided into five-character quatrains, seven-character quatrains, five-character poems, seven-character poems, five-character poems and seven-character poems. This is the work of classifying various genres of poetry in past dynasties. As for the distinction between various genres, as far as the three genres of modern poetry are concerned, they are distinguished by the size of space on the surface. Four poems are quatrains and eight poems are metrical poems. We must first understand the metrical requirements of modern poetry, and then compare it with classical poetry to stand out. The metrical requirements of modern poetry can also be enumerated. As can be seen from the table, there are four requirements. The so-called article has definite sentences, sentences have definite words, rhymes have definite limits, and sounds have definite patterns. At the same time, these four are necessary for quatrains. It is also necessary for rhythmic poetry and arrangement.
But there is also a duality requirement in rhyme and arrangement, that is, to make a simple outline understanding from the table first. As for several terms in the table, such as "one article has a definite sentence", that is, four quatrains and eight quatrains, the arrangement is customized to more than twelve sentences. The so-called "definite words in sentences" refers to the phenomenon that every sentence in the whole poem is either five words or seven words. The strict choice of rhymes and other restrictions, and "sound has a set pattern" means that a certain place of a poem should be flat or flat, and there is also a set of fixed patterns, which are not easy to change at will. The above four items belong to the basic requirements of quatrains, as well as rhyming and arranging. Of course, as we said just now, there are double requirements for rhyme and arrangement.
What about this requirement for me? It means that all the sentences in the whole work except the first one or two sentences and the last two sentences should form a dual relationship. From this analysis, we can generally see that the ancient style is obviously different from the modern style. To be more specific, it turns out that these requirements are not necessary for ancient poetry. For example, miscellaneous words are allowed in ancient poetry, and sometimes a sentence can be as long as three words or more than a dozen words.
Then classical poems vary in length, with only three sentences. What about the big one? It can be extended to hundreds of sentences, which is different from four, eight or even more sentences in modern style. The arrangement of rhyme feet, of course, ancient poetry must rhyme, but it is relatively free. Not necessarily on the last word of even-numbered sentences, the choice of rhyming words is relatively loose. Even if it allows the rhyme to change and the pronunciation to be flat, there is no qualitative provision in ancient poetry, which can be left to it.
So all these tell us that the biggest difference between ancient style and modern style poetry is that modern style poetry is very rigorous and has a set of fixed patterns, while ancient style has more independent space in meter and can be freely swayed. In fact, these limitations of modern style poetry are produced in response to the requirements of legalization.
Legalization refers to an artificial phenomenon of grammaticalization. In artificial design, all specifications, such as its flatness, rhythm, etc. It needs careful arrangement to make it the most neat and perfect form. This is the melody rhythm formed by the words themselves. It doesn't need to cooperate with musical instruments, and it doesn't need to use music scores. It shows a kind of musical beauty in itself, and also makes China's poems embark on the road of artificial design. It is a very important stage in the history of China's poetry to make it more exquisite in form. It sprouted in the Six Dynasties and matured in the Tang Dynasty, which had a revolutionary influence on China's poetry. In other words, in order to meet the needs of legalization, China's poetry has produced a completely different look, which has also formed a new genre of modern poetry.