He Ao had guessed there might be a "countermeasure" rule, so he remotely controlled the Folding Knife with his spiritual sense and touched the button.
Compared to throwing it directly, controlling it with spiritual sense gave it a degree of "proactiveness," making it seem as though it could move on its own.
This might have caused the rule to misjudge it, treating the Folding Knife as the "subject" and detaining the knife instead.
It was basically exploiting a bug.
He Ao had originally thought the most likely outcome would be some kind of "attack" against whoever released the button. He had not expected the rule to be an "exchange," nor had he expected to stumble right into its loophole.
That was partly luck.
Of course, if he had been unlucky, he would merely have been detained instead. Then Finn could rescue him, or they could find another child to "exchange" for him.
Once the rules were understood, there would always be a solution as long as they followed them.
The most dangerous time was when the rules had yet to be figured out.
"Hey, save me, you there!" At that moment, the fat man Cato, hanging not far away, watched in stunned amazement as Finn was rescued. He did not know how He Ao had done it, but it was clear that He Ao had some way of rescuing people at no cost.
He raised his voice. "You there, Loren, let me down now, or I'll scream and bring the teachers over! I'll let them know you secretly escaped punishment! The security guard will definitely lock you in the Black Room!"
"Do you know where the Handicraft Room is?" He Ao looked at Finn.
"It's that classroom." Finn pointed to a classroom nearby.
He Ao entered the classroom, took a