Literature Reference: 三更机底下，摸著是谁梭。—— 《读曲歌五首 四》 张祜 Beneath the loom at midnight, groping to find whose shuttle it is. Source from 'Five Songs of Qu Reading, Fourth' by Zhang Hu.
摸:
梭: Shuttle and traverse. The "shuttle" is a tool used in weaving to move back and forth, pulling the weft (horizontal threads) through the warp.
Meaning: Groping in the dark symbolizes exploration and perseverance.