Since Luo Jun successfully reincarnated, the only thing that bothers Qin Huai is the issue of Chen Huixi.
Chen Huixi is the most special spirit; she didn't fail the tribulation, she just dissipated.
After Luo Jun was able to speak and communicate normally, Qin Huai tried every means to subtly inquire about the Luan bird from Luo Jun. Bi fang is a Divine Bird, and the Luan bird is also a Divine Bird. Moreover, Luo Jun is well-informed and knowledgeable, so Qin Huai thought Luo Jun might know information that other spirits don't.
Then Luo Jun discovered a clue.
Under the interrogation of toddler version Luo Jun, Qin Huai confessed everything.
He had no choice; not confessing was not an option. Without laying it all out, it was hard to get Luo Jun's help in analyzing the specifics.
