Lu You's poems are a perfect combination of realism and romanticism. His poems comprehensively and profoundly reflect the social life of the Southern Song Dynasty, and are a mirror of the times, known as "the history of poetry". In this respect, he mainly inherited the realistic spirit of Du Fu's poems, but in the way of reflecting reality, he formed his own characteristics: he did not pay attention to the plot picture, but compressed the facts into extremely refined poems, focusing on expressing his subjective feelings, with high generality and strong lyricism. At the same time, he often expresses his patriotic feelings through absurd dreams and fantasies, and tries his best to highlight the poet's self-image. He is called "Xiao Taibai", which is quite close to Li Bai's romantic atmosphere. The imagination and fantasy of Lu's poems are related to resisting the ideal of saving the country and the people, which has tragic and lofty beauty, and has a more solid realistic foundation, richer social connotation and stronger militancy than Li Bai's poems.
I hope the answer can help you.