Du Fu's poems can be divided into pre-period and post-period, and the pre-period is mostly positive. Such as Wang Yue. In the later period, due to the war, Du Fu's poems changed greatly and began to become sentimental. Most of them are realistic styles of worrying about the country and the people. The style of Du Fu's poems is basically "depressed and frustrated"
He was called "the sage of poetry" by later generations, and his poems were called "the history of poetry" by later generations.