Du Fu's poems are good at describing the historical situation at that time and reflecting the present situation of the Tang Dynasty from prosperity to decline, so they are called "the history of poetry". From the Anshi Rebellion to entering Shu, Du Fu experienced great turmoil and wrote a lot of realistic works.
2. Ideological aspect. There are Confucian thoughts in Du Fu's poems, feelings of compassion for the people, concern for the country and the people, feelings of loving the people and strong patriotism, and he is known as a "poet saint". Du Shishan observed the reality of life and society rationally and carefully, and realized the sufferings and joys of the people from his own life experience. He had a strong political consciousness and inherited and carried forward the realistic spirit of The Book of Songs, folk songs of Han Yuefu and Jian 'an literature.
3. In terms of skills. Du Shishan writes dialogues and monologues with typical characters and events. Du Fu's poems are also good at lyricism, combining lyricism with narration, and also combining lyricism with scenery writing, leaving feelings in the landscape. Du Fu's narrative pays attention to objective description, so that the story itself can directly infect readers, and there is less discussion.