Of course!
According to the records in the classics,
such an extreme method of cultivation would only appear after practicing the "Heavenly Phoenix Nirvana Sutra" to a certain level of achievement.
As for what level of achievement?
That would be the "One Nirvana Realm" mentioned by Youquan.
"Nirvana" signifies the transformation of life and death.
The text recorded the concept of Nine Tribulations and Three Nirvana-nature, though the Nine Tribulations weren't elaborated upon, the Three Nirvana-nature were clearly stated.
Qi Power Nirvana, Physique Nirvana, Divine Soul Nirvana.
These three forms of Nirvana correspond perfectly to the traditional cultivation Trio of Essence, Qi, and Spirit and also align with the concept of Three Flowers Gathering at the Head during the Nascent Soul Formation.
Completing the Three Nirvanas lays the foundation for immortality, from which The Great Dao Path becomes accessible!
Before this,
there were specific doctrines for cultivation.
