Lu You's comments on Li He's poems are useless.

It means that Li He's poems are flowery in rhetoric and quaint in words, but they often fail to achieve clear meaning and practical effect. Compared with their rhetoric, the actual content and value can be said to be insignificant and useless.

Lu You's On Useless criticizes Li He's poetic expression and artistic value, arguing that he excessively pursues artistic form and ignores the practical function of poetry itself.

Li He's poems have also been widely praised and sung by later generations. Lu You commented that his poems were "useless", but also expressed doubts and criticisms about Li He's literary attainments.