Extended data:
Du Fu's poems are good at describing the historical reality 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.
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.
Du Fu created a large number of seven-character metrical poems, which were extensive in content, skillful in technique, attached importance to 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.