There are strict metrical requirements for six-character quatrains, which require six words in each sentence, even and flat, four sentences in one poem, even rhyming sentences and one ending rhyme; Yilian is used to confrontation, which is wrong. Sometimes both couplets are antithetical.

Such as Liu Changqing's "Love" couplet:

Baiyunxing Wan Li is in Wan Li,

The stream before the bright moon and the stream after the bright moon.

Disappointed with Changsha,

The river beach is full of fragrant grass.

Both couplets use antithesis, such as Wang Wei's self-adaptation;

Shannan is a secluded place,

Back to my first service under the forest.

Would rather be bent by five wars,

It's a full ladle.

Six-character metrical poems also have strict metrical requirements, requiring each sentence to be six-character, even and even, and even sentences to rhyme. But the orthodox poem is an eight-sentence poem with two antithetical couplets. For example, Liu Yuxi's "Six-character Appreciation of Hu Ling":

It is more difficult to be urged by time if you are too far away.

Yanyuan has gone, and Fenchuan has brought books.

I was still looking forward to the moon setting, but I never came back to my dream.

Today, please ask the singer to sing a poem by my brother and send a drink.