This poem was composed during the Wu Zhou period, a time of frequent border conflicts. Shen Quanqi, serving in the court, repeatedly heard reports of incessant northern campaigns. The title "Moon Over the Mountain Pass" follows the old Yuefu tradition, often used by poets to express the sorrow of separation between soldiers and their families or to reflect on the realities of war. While inheriting this tradition, Shen Quanqi skillfully employs the "moon" as the unifying image—shining both on the frontier and the heartland, both cold and distant, yet implicitly evoking human sorrow. Without directly depicting grief, the poet uses the "moon's journey" as a thread, creating movement within stillness, allowing readers to feel a profound solitude and the desolate cold of war beneath its clear light.