Taonian is an immortal. He was originally a human being and was buried under a dead peach tree after his death.
The peach tree is a sacred tree that has been practicing for thousands of years. It was supposed to survive the tribulation and become a god, but was struck by a thunder tribulation and its soul was shattered.
Tao Nian was nourished by the energy of the peach tree and practiced unconsciously.
When he was struck by lightning during the immortal tribulation, his consciousness was blurred, but he was awakened by the cry of a baby. He was not distraught, but he became an immortal.
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