How does the work tell the story of Du Fu? What are the advantages of writing like this?

(1) Narrating from the perspective of "I" makes the event appear true and credible; ② Introducing Du Fu's story with the theme of "money" to arouse readers' interest in reading; (3) Narrating his experience from Du Fu's mouth with dialogue, which makes the narrative more concentrated; (4) The combination of scene description and Du Fu's narrative endows Du Fu's story with poetic beauty that is sad but not hurt.