What are Du Fu's poems about the country and people?

Worrying about Li Yuan in poor years, sighing in the intestines —— From Beijing to Fengxian, Sing 500 Words by Tang Du Fu

The wine in Zhumen stinks, and the bones on the road freeze to death —— Tang Du Fu's "Singing 500 Words from Beijing to Fengxian"

After three months of war, a letter from home is worth a ton of gold —— A Dream of Spring by Don Du Fu.

There are thousands of spacious buildings that protect the world, and the poor people are happy, and the wind and rain are as peaceful as a mountain —— Tang Du Fu's "The Hut is Blown by the Autumn Wind"