Actually, the old man is right, Fu Qian is indeed talking nonsense.
Don't be fooled by the former's cheerful shouting over there; it can indeed be entirely dismissed as Extraordinary Elements, understood instead as a mentally ill person's self-refutation—
Years ago, the suicide of his beloved son led to his own mental issues, which prompted the birth of this asylum.
And that long career as a Recorder was nothing more than a self-deceptive and masochistic game generated from his inability to accept that his son was gone forever.
In record after record, the old man was trying to trace his son's shadow.
As for why he really found it?
It's simple; it can be understood as the same reason why the old man couldn't search for the things he recorded.
The part of the self with the ability to search was gradually separated out, becoming an independent entity.
This was the real way he had been living within his will, as mentioned before.
