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. Ideologically, Du Fu's poems are full of Confucianism, showing compassion for the people, caring for the country and the people, and loving the people, with a strong patriotism and a reputation 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. Technique: Du Shishan writes dialogues and monologues of characters and chooses typical characters and events to describe them. 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.
4. Language: Du Fu's writing attitude is very serious, his language is refined, his words are accurate, his images are vivid, his colors are rich, and he is good at using folk spoken language.
5. Genre: Du Fu's works are all good, with five or seven archaic words and quatrains. He often uses different poetic styles to express different contents. The narrative uses classical poems with less metrical restrictions and easy description, while the lyric uses modern poems. Du Fu created a large number of seven-character metrical poems, which were extensive in content, skillful in technique, focused on the antithesis of metrical patterns, rigorous in metrical patterns and refined in language, and made great achievements, making the creation of seven-character metrical poems mature. He also wrote new Yuefu poems, describing the sufferings of society and people's livelihood.
6. Style: The main style of Du Fu's poems is gloomy, changeable and colorful, or bold and unrestrained, or fresh and delicate, or gloomy and sad, or rich in rhetoric, or plain and simple, or popular and natural. Du Fu's poems absorbed the artistic skills of predecessors and developed into a unique new style. Express one's patriotic thoughts.