Du Fu and Li Bai are collectively known as "Big Li Du", and Du Fu is often called "Old Du".
Du Fu's poems are generally considered to be "depressive" in language. The language and chapter structure are full of changes, and they emphasize the refinement of words and sentences. The word "depressed" was first used in the Southern Dynasties, "the body is full of melancholy and melancholy, and the sun and moon are beautiful." Later, Du Fu wrote that he accurately summarized the language of his own works with the four words "depressed and frustrated", "As for the depressed and frustrated, it can be agile at any time, and it can be lifted up." The disciples of Xiong and Meigao can even trample upon them." Further research on Du's poetry found that the formation of his poetic style is closely related to the Confucianism he adhered to. At the same time, Du Fu was at the end of his prosperous age. When he was young, he had great ambitions, "he would be at the top of the mountain, and he could see all the small mountains at a glance." Later, the Anshi Rebellion broke out, the country's fortunes declined, and his official career was not successful. There is a shift towards realism.