Upon hearing the words, Qin Shou cracked a smile and said, "Have you ever heard of 'Twinkle, Twinkle, Little Star'?"
"What?" Zhou Xin was taken aback, and although his mouth was stuffed with a shoe, it didn't affect his ability to speak, as he could still use sound transmission or ventriloquism. Such methods were trivial and known by all cultivators, so being unable to use his mouth wasn't an issue.
Then Qin Shou sang, "Twinkle, twinkle, little star, how I wonder what you are... Ever heard it?"
Zhou Xin's face darkened as he transmitted, "Are you messing with me?"
Qin Shou laughed and said, "Listen..."
Zhou Xin, puzzled, watched Qin Shou and then saw him lift a mallet and drop it on the zigzag ruler, producing a crisp 'ding' sound.