There is no reincarnation, only awakening.
Long Ling was not chosen by the Ancestral God and turned into a Mortal Body.
Rather, Long Ling is the Ancestral God!
"Deities, are actually humans."
She said softly, "Humans who have mastered a certain power."
Lu Bu'er exhaled a heavy breath from his chest and murmured, "If nothing unexpected happens, that's the case. Deities, in fact, are not alien species. Otherwise, it doesn't make sense that Long Ling is a Deity, whereas her full-blooded younger brother is human. Omega must be something cloned from her template... but their attributes are entirely different. Until now, I don't know what Omega was created for. As for the others in that research institute, they're likely the remaining four Deities: the Abyssal Singer, Zhúzhòu's Dragon, the Corrupt Death God, and the Hundred-armed Giant."