There are * * * eight sentences in the ancient rhyme, but no two sentences are couplets, and each couplet has a specific name. What is the name of each couplet of Wang Yue's Five Laws?

Rhyme is divided into four parts: first couplet, parallel couplet, neck couplet and tail couplet. The metrical poem has * * * eight stanzas, every two sentences are linked together, and one is linked to the quadruple. Among them, the antithesis of metrical poems is roughly in the middle of two couplets, namely couplet and neck couplet. The first couplet, the parallel couplet, the neck couplet and the tail couplet are similar to prose, and the pen starts at the beginning and closes. The first couplet is the beginning of the poem "Qi". They belong to Cheng, Zhuan and Hewei.