In fact, not all ancient poems are demanding and plain. According to the genre of poetry, ancient poetry can be divided into ancient poetry and modern poetry. Classical poetry does not pay attention to hierarchy, and there are no strict restrictions on the number of words and sentences in a poem. It's just that modern poetry pays attention to flatness, so modern poetry is also called metrical poetry.
There are four main genres of modern poetry: five laws, seven laws, five laws and seven laws. The five laws and seven laws are all eight sentences, and the two sentences are connected together. * * * has a head, a chin, a neck and a tail. Among them, parallel couplet and neck couplet not only require relative sentences, but also pay attention to the adhesion between couplet and couplet. If you don't insist, you can't call it a poem.
Modern people have written five-character or seven-character poems in ancient genres. If it meets the requirements of the law and poetry, the sticking place is in compliance, and the right place is in a safe position, you can generously write the words "seven laws", "seven sections", "five laws" and "five sections" in the title. If this is not the case, you can just write the title without marking the name of the metrical poem, so as not to make people laugh.
As for Lin Daiyu's words, they belong to the description of the characters' language in the novel, which can be used as a reference for analyzing the characters' images, not as a poetic theory, and not as an excuse for writing metrical poems without paying attention to flatness.