Literature Reference: 素斾低寒水，清笳出晓风。—— 《张左丞挽歌二首 一》 The white banner lowers by the cold water, while the clear reed-pipe sounds in the dawn breeze. Source from 'Zhang Zuocheng's Elegy I'.
素:
Simplicity and refinement. When used in names, it often signifies pure character and superior qualities, which are conducive to earning others' affection and trust.
斾: Weary banners, fluttering standards.
Meaning: The white banner symbolizes purity and solemnity, often used to express mourning or reverence.