The person who placed the foam box at Jiang Ning's doorstep was clad in a long coat and trousers, with their face concealed by a mask and their head covered with a helmet. Even the hands cradling the foam box were sheathed in black cycling gloves, wrapping themselves up tightly.
They were of average build, and at first glance, it was somewhat difficult to distinguish their gender, but the experienced police officers could still tell from certain characteristics and the way the person walked that it was very likely a man.
The property manager had already summoned today's duty guard, and pointing to the person on the monitor, he asked the guard, "Have you seen this person today?"
The guard took a careful look and immediately remembered, "He came by, yes, I even spoke to him. He said he was here to deliver food, so I let him in. I remember his voice, it was a man!"