If Ning Fan had this power before, he would have helped Xu Ruolan with her Bone Marrow Cleansing and "The Book of Changes" practice long ago, without dragging it until today.
Bone Marrow Cleansing and "The Book of Changes" practice is equivalent to transforming a person's physique from acquired back to innate.
Unless one relies on Spiritual Energy refining, it's impossible to expel those acquired impurities with just True Qi.
Last night, Xu Ruolan rarely entered an Ethereal State.
Ning Fan gritted his teeth and transferred almost all of his Gang Qi into the Golden Core to be refined into Spiritual Energy.
It was relying on this Spiritual Energy that Xu Ruolan's physique could undergo a fundamental change.
After completing this step, the exhausted Ning Fan fainted on the spot.
To this day, the Gang Qi within Ning Fan is in a state of depletion, less than one-fifth of its peak.
Thinking of once again assisting Xu Ruolan with Bone Marrow Cleansing is no more than a fool's dream.
