In the brightly lit corridor, Luo Zheng calmly looked around, pricking up his ears. All was quiet; not a soul was in sight, nor any sound to be heard. About ten meters ahead was the fire escape, and some twenty meters behind him was the elevator, which led underground. The elevator entrance connected to the office lobby and led outside. Where could the intruder be hiding?
Remaining on alert, Luo Zheng approached the door to the fire escape. He pressed his back against the wall and listened for a while with pricked ears. There was no sound coming from the stairwell. Cautiously, he cracked open the fire door to peer inside, but saw nothing. A sense of bewildered suspicion grew within him. Where could the intruder have gone?
"Did you find anything?" Luo Zheng closed the fire door and quietly asked through his earpiece.
"Strange, no sign of anything. We've notified your guys," Zheng Duo replied in a hushed and startled voice.