The pain of being displaced for half his life gave Du Fu an unforgettable understanding of the history at that time. Du Fu had personal experience of the corruption of the ruling class and the hardship of the working people. In a large number of poems, Du Fu boldly exposed the extravagant and shameless life of the ruling group. The famous saying that has been passed down through the ages, "The wine and meat in the rich family smells bad, and there are frozen bones on the road" is an excellent description of the dark society at that time.