Rhyme began to become couplets, with two couplets in the middle.

On the connection and transformation of metrical poems. The so-called connection and transformation is a term of "poetry structure and rules". The beginning is the beginning; Undertaking' means undertaking the above and making a statement; Turn' is a turning point, which is demonstrated from another aspect; "He" is the end of the full text. "As far as development is concerned, the transition from inheritance to integration is the basic composition of poetry creation. The so-called "start" means "start", which can also be called "start" or "start". The hardest part is actually in the beginning The ancients attached great importance to the beginning of poetry creation, and they attached great importance to the beginning, including the so-called starting from the Ming Dynasty, starting from the dark, accompanying, starting from the right, starting from the single, starting from the right, or starting from the scene, or engaging in it, or expressing their thoughts directly, or placing their hopes on it, or writing scenes, or expressing feelings, or narrating, and so on. Poetry and prose creation, if started well, can receive the sound effect; The so-called' inheritance' means connecting the preceding with the following, from top to bottom, from top to bottom, and closely linking the context according to the road of love, scenery and logic. The so-called' turn' is to turn, change, or always meet, or share, or coincide, or be stable, or slow, or rush, or like a slow spring breeze. Whether a poem is well written depends largely on' turning'. If the turn is good, wonderful, wonderful, unexpected and wonderful, it will make the work ups and downs. The so-called' combination' is the end, ending the full text. The ending is often the essence of poetry and an important link for the author to express his feelings and ambitions. Generally speaking, there are two kinds of knots at the end, one is an open knot and the other is a dark knot. Clearing the knot is to express your feelings, make things clear, and express your feelings and lofty sentiments to the end; Dark knot is to reason with things, to express feelings with scenes, to convey, refract and imply the author's feelings, sustenance and ambitions with events and scenes, and to give people room for free play and imagination. The ending is often the climax of poetry. If combined well, the works will be magnificent, impassioned, far-reaching and thought-provoking. Metric poetry is a new form of poetry created by Tang people on the basis of classical poetry. Compared with classical poetry, metrical poetry has many additional restrictions. It has strict rules not only in rhythm, but also in format. You can't cross the line. If you cross the line, it is not a metrical poem. Therefore, the creation of metrical poetry is much more complicated than other forms of poetry creation. Metric poems can be divided into two categories: metrical poems and quatrains. Rhyme can be divided into five laws, seven laws and arrangement (this article will not discuss arrangement). The format of the five laws and seven laws is eight sentences and four sentences, and one sentence is two. The first couplet is called the first couplet, and the composition is called a sentence. The second couplet is called parallelism couplet, and the composition is called bearing sentence. The third joint is called the neck joint, which is called a turning sentence in composition. The fourth part is called tail couplet, which is called complex sentence in composition. The upper sentence in the couplet is called a sentence (also called a sentence) and the lower sentence is called a sentence. The two couplets in the middle pay attention to antithesis. Quatrains are divided into five quatrains and seven quatrains. The format of the five elements and seven verses is four sentences and two couplets. The first and second sentences are called the first couplet, and the third and fourth sentences are called the last couplet. According to the interpretation of the Origin of Poetry, quatrains are "truncated sentences", that is, four sentences of metrical poems are truncated, or the first two sentences are truncated, or the last two sentences are truncated, or the middle two sentences are truncated. Judging from the composition, the first sentence of the first couplet is an opening sentence, and the second sentence is a bearing sentence. The first sentence of suffix is a turning sentence, and the second sentence is a combination sentence.