This work was composed in the autumn of 767 CE, the second year of the Dali era under Emperor Daizong, while Du Fu was residing in the Dongtun area of Kuizhou (present-day Fengjie, Chongqing). The title "Northern Hollow" refers to the northern slopes of the mountainous region. Although the An Lushan Rebellion had been quelled, the land of Shu was still riven by warlord conflicts and plagued by marauding deserters. Coupled with the relentless exactions of the authorities, the populace had nearly all fled or perished. Venturing deep into the wild hills, the poet witnessed the desolate spectacle of emptied villages and abandoned fields. Employing a descriptive technique approaching pure reportage, he recorded this landscape of ruin wrought jointly by war and tyranny. Though a mere forty characters in length, the poem functions like a tightly framed close-up on the era's open wound, concentrating within it the most deeply sorrowful and austere critical gaze of Du Fu's later years.