He continued to make calls, but few were answered.
From a psychological perspective, it's highly likely that the fugitives would answer.
Such internal phones are usually used by children and for property emergencies; if one were a fugitive, facing such a call, it would be less risky to answer the phone to prevent property management from visiting in person to ask questions.
Those households that didn't answer, Ji Yun actually considered less suspicious.
It's not to say that his judgment was necessarily accurate, but under the constraints of time, Ji Yun could only make the choice with the higher probability, like a multiple-choice question where you instinctively choose the longer option because you know it has a higher chance of being correct.
"Hello, 5th-floor resident, I'm from the rescue team..."
