C215 Find clues

Zhenjin stared at Lin Xiao as he walked away, signalling Jiang Ru Ning to follow him. The two pretended to walk naturally to Xiao Chen's office and turned around, stopping in their tracks. In less than two seconds, they heard a pleasant electronic beep. The two of them walked in one after the other, and Jin hurriedly closed the door.

"Did you set up the monitor?"

"I did