C376 Shen Mengyao Wants Me to Die

"Hey, there's really a sound. Where did it come from?" Su Wan asked with a puzzled expression.

Shen Minglei frowned. "Shh, listen again. . . "

The people in the ward perked up their ears and listened attentively.

"Di. . . Di. . . " Another two sounds rang out.

This time, the sound was very loud. Su Wan immediately knew where the sound came from