Body refining is a tremendously painful process that tests a cultivator's willpower.
If one's willpower is weak, they generally can't endure such torment, eventually choosing to give up.
Moreover, body refining also has extremely high demands on a cultivator's physical body.
Some are born with naturally strong bodies, allowing them to cultivate body refining techniques rapidly, much like Cheng Long, who possesses Innate Divine Power, making him a promising candidate for body refinement.
Yet, some people, despite having immense willpower, have bodies that are too frail, thus their speed in cultivating body refining techniques is extremely slow.
Such people are not suited for the path of body refinement.
And what about Ye Chen!
He, though young, can unleash the Power of a Hundred Tigers, stronger than many Tier Two Demon Beasts.
Even if this power is acquired through cultivating body refining techniques, it already illustrates his high body refining talent.
