1, Du Fu is called a "poet saint" because the name of a saint is a respectful name of Confucianism. People who are called saints are all people who are in line with the Confucian thought of "caring for the country and the people and loving the people like children" and have broad compassion. Du Fu is such a person. He has been wandering from place to place all his life, but he has always been enthusiastic about joining the WTO, loyal to the monarch and patriotic. I am in a difficult situation, but I can still care about people like myself. This kind of fraternity is worthy of the title of saint. This emotion is mainly expressed through his highly accomplished ci works.
2. The characteristics of his poems can be summed up in four words: "depressed and frustrated". Most of his poems are about social unrest, political darkness and people's sufferings. His poems reflect the social contradictions and people's sufferings at that time, so they are called "the history of poetry".