Yarebin mentioned the "cleaner" because Yang Yi's reaction led him to conclude Yang Yi was aware of the cleaner, and therefore it could be assumed that Yang Yi had a connection with the cleaner. Everything came together smoothly, and Yarebin began to lure him into starting from the cleaner's side.
Yang Yi knew he was being used as a pawn by Yarebin, yet he wouldn't resist. Why?
Of course, it was because Yang Yi indeed could make a breakthrough from the cleaner's side, so Yarebin just needed to give him a little nudge, and Yang Yi would take initiative from there.
As Yarebin had said, whether it was the Grey-cloaked People or the cleaner, whether it was the CIA or the KGB, they were all like unshakable plasters that cling to you, and if you didn't want unnecessary trouble, it was better to stay as far from these organizations as possible. Therefore, Yarebin naturally hoped to see Yang Yi fulfill his wish. As for whether Yang Yi could achieve it, Yarebin wouldn't suffer any loss.