Literature Reference: 带霜南去鴈，夜好宿汀沙。——《闻鴈》杜牧 The wild geese head south with frost, finding a good night's rest on the sandy shore. Source from 'Hearing the Wild Geese' by Du Mu.
宿: Celestial Mansions.
沙: Sand, grains of sand.
Meaning: Su Sha signifies peaceful rest on a tranquil sandy shore, symbolizing serenity and calm.