Du Fu's poem "Gui Yan" comes from Hai Yan's "Slight Sorrow", which means that the poet himself was born from humble origins, from the folk, unlike Li, who was born in a rich family. The phrase "spring comes" means that you will come to the imperial court to be an official temporarily in the enlightenment era. If the swallow comes in spring and goes in autumn, it won't stay long. In the middle four sentences, the swallow didn't know the meanness of "mud", but when he saw the "Jade Hall" opened, he went in and out several times a day, hiding in the imperial court with mud in his hand, and worked hard day and night, and managed miserably. "Embroidered household", "Huatang" and "Yutang" are all metaphors of the imperial court. The last sentence is a warning to Li: I have no intention of fighting for power and profit with you. You don't have to be suspicious and slander me. I'm retiring. At that time, power had fallen into Li's hands, and Zhang Jiuling knew that he could do nothing. He had to give in, but he also had some complaints and regrets.
In the poem "Shuang Yan", every sentence says "Yan", but every sentence expresses itself and is related to the word "eating".
Through the interpretation of the image of swallows in Du Fu's poems, it is found that Du Fu's chanting of swallows consciously or unconsciously outlines Du Fu's inner changes in the process of pursuing personal political ideals and scholar's moral ideals, and objectively reflects Du Fu's mental journey in the process of building Confucian ideal personality.