1, the first couplet, also called the initial couplet, is the opening, the first sentence and the second sentence of a metrical poem. This couplet is used to point or break the topic and summarize the main idea of the whole article.
2. Couplets, also known as couplets, are the second couplet of rhyme, namely the third and fourth sentences. This couplet inherits the meaning of the first couplet and further expands and deepens the theme.
3. Neck couplet, also called seal couplet, is the third triple of metrical poems, namely the fifth and sixth sentences. This pair of couplets is used to transfer the meaning of the text and further expand the theme of the poem.
4. Tail couplet, also called knot couplet, is the final sentence of rhyme, the seventh sentence and the eighth sentence. This couplet is used to summarize the whole article, point out the theme, respond to the first couplet, and make the poem structure complete and rigorous.