Literature Reference: 暮天飞旅鴈，故国在衡阳。—— 《旅中秋月有怀》 In the twilight sky, migratory geese fly, while my homeland lies in Hengyang. Source from 'Mid-Autumn Moon While Traveling.'
旅: Journey, Military Campaign.
鴈:
Meaning: Migratory geese symbolize those wandering far from home, expressing longing for the homeland.