Just as Supremacy Oville had said, the physical rebirth cultivation method was actually to leave a backup for his body and rely on this backup to reconstruct his body and complete rebirth.
In the previous two physical rebirths, Chu Nan followed the requirements of this cultivation method and absorbed the ability particles to reconstruct his body according to the mark left behind by his consciousness and cultivation method.
Under the effect of the Goddess' Song cultivation method, the production process of his physical cells was faster and better. All the speed at which he was reborn was much faster than Supremacy Oville had said.
However, it was precisely because it was too fast and because he had reforged his body too many times that Chu Nan was too skilled. Therefore, he ignored the last step the first two times and did not notice a very important change.
This change was the first moment his body was reborn.