In the dim corridor, Qin Nuo held a mop, cleaning the dirty, waxy floor.

He soaked the mop head in the bucket, the cotton strands spreading out like submerged hair, the filth dispersing in the water.

Qin Nuo stared into the bucket, lost in thought for a moment: "This mop is heavier than I imagined. Am I holding an ordinary mop, or a human mop?"

Quickly, Qin Nuo shook his head.