Chapter 47 This is a Trial

Feng Xue had already tested the effectiveness of the cardboard box. Even though he knew about the peculiar characteristics of the cardboard box in advance, once Xiyao Chen crawled into it, he would momentarily perceive the box as an ordinary object that didn't strike him as odd at all until he began to consider where Xiyao had gone and remembered he had a box, at which point he would slowly start to realize that Xiyao might be hiding inside it.

And all of this transpired under the premise of Xiyao continuously moving inside the box.

In other words, as long as the cardboard box wasn't fixedly watched, even if the person inside the box kept moving it around, it wouldn't be detected as anything suspicious.