Ideologically, Du Fu's poems are gloomy and have a deep sense of reality and history. The idea of "people are the foundation of the country and defend the country" runs through his poems, which is a strong people-oriented feature in Du Fu's poems and has reached a height that no one has ever had before.
(1) Deeply sympathize with the people
(2) incomparable love for the motherland
(3) The strong hatred of the ruling class for all kinds of crimes that bring disaster to the country and the people.