The drums of the defenders cut off people's communication, and a lonely goose was singing in autumn in the frontier. The dew turns to frost tonight, and the moonlight at home is bright! Brothers are scattered, and no one can ask about life and death. Letters sent to Luoyang city are often not delivered, and wars often do not stop.
During the Anshi Rebellion, Du Fu was displaced from place to place, suffering hardships and worrying about the country and the people, which was really filled with emotion. As long as you touch it gently, many things will flow out from the bottom of the pen together, so the common theme of homesickness is written out by sadness and frustration.