Both sides of the yellow river recaptured by the imperial army's background story and its enlightenment.

both sides of the yellow river recaptured by the imperial army was written in the spring of the first year of Guangde in Tang Daizong (763). In the winter of the first year of Baoying (762), Tang Jun won a great victory in Hengshui, near Luoyang, and recovered Luoyang, Zheng (now Zhengzhou, Henan Province) and Bian (now Kaifeng, Henan Province). Rebel leaders Xue Song and Zhang Zhongzhi surrendered in succession. In the second year, Shi Siming's son, Shi Chaoyi, hanged himself in defeat, and his Ministry surrendered Tian Chengsi and Li Huaixian one after another. So far, the "Anshi Rebellion" that lasted for eight years came to an end. Du Fu was a poet who loved his motherland and suffered from chaos. At that time, he was living in Sichuan. After hearing this news, he was ecstatic and wrote this poem.