Li Bai's poems are bold, fresh and elegant, while Du Fu's poems are gloomy and sad, with dignified language. What are the main reasons for their different creative styles?

D. Different social realities

The main reason why the two poets have different creative styles is that they have experienced different social realities and fed back different information, which means different feelings. Emotion affects the starting point of brewing poetry, and the poetry after the manuscript is naturally different.