```
After a while, his phone rang. He took a glance at it, stood up, and dropped, "I'm going to the restroom," before leaving the private room.
...
From the rooms on both sides of the corridor came laughter and cheers, accompanied by the booming background music.
Through the thick soundproof walls, the muffled singing sounded as if it was coming from a distant place.
Cen Dongsheng arrived at the washroom, turned on the tap, and splashed his face with cold water. It was very quiet here, and when alone, staring at himself in the mirror felt like being in another world.
He dried his hands, opened his phone, and dialed a number.
"Hello, Sister Zhi Zhen."
"Dongsheng, how's it going with your classmates?"
A woman's cheerful voice came on the line.
It sounded like a parent's voice...
"Not bad."
Cen Dongsheng replied casually, getting straight to the point.
"So, did you find out anything?"