His poems are distinctive in personality, profound in thought, rich in emotion and outstanding in literary talent. His poems involve many fields, such as society, family, individuals and so on, involving farmers, leaving their homes, landscapes, chanting history and so on, and have very wide social significance and literary value.
The specific reason why Du Fu's poems were chosen in 300 Tang Poems is probably because editors and critics of the times think that Du Fu's poems are the most representative and influential works in Tang Poetry. Moreover, Du Fu is considered to be the writer with the most literary value and historical significance in Tang poetry. His poems were loved by readers and scholars at that time and later, so his poems were included in many Tang poems.