Rhythm poetry is a type of modern poetry, a Han poetry genre that became popular in the Tang Dynasty. The four couplets of rhythm poetry are as follows:
1. The first couplet: also known as the beginning and the sentence. Heqi couplet, because it is the beginning of the topic, is also called Poti, which is the title of the first and second sentences in the rhymed poem;
2. Jaw couplet: refers to the second couplet of the rhymed poem, that is, the third and fourth pairs sentence;
3. Neck couplet: refers to the third couplet of the rhymed poem, which is the fifth and sixth sentences;
4. Tail couplet: refers to the fourth couplet of the rhymed poem (seven, (eight or two sentences), no need for confrontation, so named because it is at the end of a poem.