Si Ren believed most of what Zhao Ziying said, especially since he was the one who had brought that plant into the Underworld. Strictly speaking, it had been smuggled in, hidden on a flower thief.
The task Zhao Ziying had given him—to search for the Demon Clan's weasel—probably stemmed from a suspicion that they were behind the incident.
Therefore, there was a high probability Zhao Ziying was not lying.
Chapter 603