C1984 Method of Condensing an Origin Life Seed
Even though Ning Caichen had fallen, he was still an avatar in the mortal world.
The doppelganger would also become a True Body and live on.
There was a difference between a True Body and a doppelgänger. The doppelganger did not have a mind of its own, so it was easy to turn into a demon.
If the True Body did not awaken before it was reincarnated