Literature Reference: 乌孙驱未尽，肯顾辽阳勋。—— 《相和歌辞 从军行 一》 The Wusun are not yet driven away, who would care for the merits of Liaoyang? Source from 'Cong Jun Xing' by Monk Jiaoran.
乌: The crow, cloaked in darkness, as time ceaselessly flows by.
孙:
Characters for personal names, surnames.
Meaning: Wusun refers to an ancient ethnic group in the Western Regions, symbolizing resilience and unyielding spirit at the frontier.