He indeed keenly grasped a vulnerability that the other party had revealed; Pei Ye didn't know what he had seen—perhaps he really found the cabin mentioned in the Recording Voice Paper, or maybe he discovered something else—but in any case, he must have unveiled a part of the truth in this adventure.
In the final chapter of his notes, he left a long, and also final, piece of text.
Drops of ink spread through the paper, and one can almost envision the man's surprised expression as he began to write. This was not an analysis of the case, but rather the accumulated soliloquy of a man who sat alone late at night after several days.
...
...
Fighting it felt like I was back to those afternoons practicing swordsmanship with you, Xiao Feng.
I didn't expect it to be such a thing; whoever designed it must be a genius who shocks the world. Whatever he intends to do has already left me somewhat terrified.