Literature Reference: 沙尘惊塞外，帷幄命嫖姚。—— 《郊庙歌辞 享章怀太子庙乐章 武舞作》 The sand and dust startle beyond the frontier, as the commander issues orders from the tent. Source from 'Jiao Miao Ge Ci, Xiang Zhanghuai Taizi Miao Yuezhang, Wu Wu Zuo'.
沙: Sand, grains of sand.
尘: Dust and loess.
Meaning: Sand and dust symbolize the vastness of the frontier and the intensity of war, representing resilience and courage.