Chen Ge wished to go to warn the middle-aged man, but it was already too late. The cats' meowing grew louder and louder. He hurriedly went to hide in the nearby stairwell. The elevator stopped on this floor. There were no footsteps or the even sound of breathing. Moments later, there came the sound of knocking on the door. The knocking appeared to happen out of thin air. There was no precursor to it at all. It was like the person teleported to the middle-aged man's house and tapped on his door.
"The middle-aged man might reveal my presence to him."
