Despite being gifted with a high purity and an extremely rare spiritual vein, Jin Yahui did not become a disciple of the Master until six years passed.
As such, Yahui had to deal with the bullying and attitudes of the (supposed) talented "senior brothers".
It was during this time that he had grown stone-faced and determined to break away from his chains.
He spent years creating his own cultivation method to slap everyone's faces, especially the Master's.