C105 By yourself

The old poisonous substance was indeed hiding from Qin Lang.

Because when Qin Lang found the "residence" of the old poison, he wasn't even there.

In fact, the old poison was normally a "invisible person", because his job wasn't important at all. His main job was to lock and open the gates, and since the school had a lot of security guards, his job of opening and locking the gates was useless