After Xia Yu changed her clothes, they went back to that ladies' restroom again, only to find that the laughter had gone. At that time, she was too scared to listen to it carefully. But now she recalled that the laughter was not only gruesome and eerie but also weird, which seemed to be in a stable tone all the time. So, Xia Yu reported it to Shen Qiang.

Shen Qiang, putting on a gloomy face, was looking for something everywhere. Finally, he found a voice recorder in a trash can. ...