C477 Horrifying Hearing(1)

Standing quietly on the platform outside the ten-story fire ladder, listening for dozens of seconds, Mong Han whispered to Hsu Xiaofeng, "There are two people on the platform on the eleventh floor. One of them is smoking. The other is pressing his cell phone. Follow me. I will be in charge of blocking the surveillance cameras on the platform between the eleventh and twelfth floor