The Yin Corpse Sect is extremely strict in accepting disciples. Besides having corpse refinement abilities, one's cultivation must also not fall behind. Tian Baocheng is skilled in corpse refinement but lacks cultivation methods.
The sect does not turn away anyone; not only do they not reject Tian Baocheng, but they also teach him various cultivation methods and guide his practice.
However, when Tian Baocheng joined the Yin Corpse Sect, he was already over thirty, and his natural talent was insufficient. He could not cultivate deep into the Dao and remained at the beginner's stage without further progress.
Even after twenty years, Tian Baocheng only surpassed the first realm of the Xuan Sect's six realms, yet the second realm was beyond his reach for life.
If he wishes to become an inner sect disciple, he must find an alternative path.