C431 What a Cunning Opponent

The policeman with glasses looked at Zhang Qing, who nodded at him.

Then, she frowned and asked, "Did you discover something?"

I glanced at her and didn't answer her question, because I wanted to check again. I turned my attention to the LCD monitor and the video started to go backwards.

When I saw that the courier was about to step out of the elevator on the third floor