In Cang Hua, which poems are Yan Yu's comments on?

In Cang Shi Lang Dialect, Yan Yu's poetry comments were written in view of the disadvantages of the Song Dynasty. The trouble with Song poetry is that it deviates from the aesthetic characteristics and creative rules of poetry. He said that poets in the Song Dynasty often argued and reasoned in their poems. Even Su Shi, who advocated "nature" and "plainness" in his creative thinking, often used the discussion of current politics to enter poetry, which led to the famous "Wutai Poetry Case".