He cultivated until dusk and then finally stopped his practice.
Upon standing up, he was startled to find a metallic clinking coming from his skin and a crackling sound from his muscles and bones.
Upon closer inspection, he discovered a layer of stinky black grime on the surface of his arm's skin. His body felt sticky, and when he touched it, the black odoriferous grime was present all over.
It seemed that the impurities within his body had been expelled.
Feeling an itch in his throat, he actually coughed up a clot of bloody phlegm.
He truly understood what it meant to undergo a rebirth, to be rejuvenated.
Every movement felt lighter and more agile.
In the past, lifting his arms would feel constrained.
But now, it became exceptionally easy, with the sensation of being pulled and tugged by his skin, muscles, and tendons greatly diminished.
These were the benefits brought about by the enhancement of his skin, muscles, and tendons.