Chapter Two: The author expresses his nostalgia, gratitude and praise for the poor peasant woman Dayanhe through her memory and nostalgia for the wet nurse, thus arousing people's sympathy for the tragic fate of working women in old China and strong hatred for this "unfair world".
Chapter 3: Starting from "if", we use "hoarseness" to describe the bird's voice, and then continue to write the content of singing, from singing before death to writing that the soul returns to the earth after the bird's death, and finally replacing the bird's image with the poet's own image, which directly expresses the poet's sincere and enthusiastic patriotism.