The so-called "different interest" put forward by Yan Yu is actually the "interest" in traditional poetics. "Interest" and "meteorology" are two important theoretical categories in Cang Lang Shi Hua.
On poetry in Cang Hua, in view of the disadvantages of Song poetry, it especially emphasizes the particularity of poetry art and puts forward the central slogan of "don't be talented" and "don't be interesting". If "Biequ" is to answer what kind of poem is good, then "Biequ" is to explain how to make such a good poem.