The so-called second reincarnation didn't mean that she had lived a second life.
It was because Nan Li had reincarnated a long time ago. The spherical object before Fang Jinyu was a remnant of Nan Li's will before she died. After being nurtured in such a strange place for an unknown period, it had formed such a special creature.
In essence, it was a mystical spirit.
However, it was different from the common netherworld spirits such as Withered Bone Woman, Paper Wedding Dress, Grass Sword, Impermanence, Ox Head, Horse Face, Judge… The main difference was that it was an immortal mystical spirit.
It difference between it and the common netherworld spirits was that it was usually very difficult for a second immortal mystical spirit to appear.
However…
Fang Jinyu saw an exception.
It was because Nan Li's second incarnation was the same type of immortal mystical spirit as Yao Zaixian's "elixir spirit."
They were all born through alchemy.