Because he noticed the tightness of his skin membrane and realized it was tougher than before.
This layer of skin membrane beneath the flesh is a key component of physical defensive power.
The reason that Ninth Grade Martial Arts body defense is so strong and can resist most damage from ordinary swords and knives is due to that layer of skin membrane beneath the body.
The existence of the skin membrane is akin to wearing a form-fitting soft armor that covers the entire body.
"Now facing the strong warriors of the Yellow Heaven Sect, I feel more confident!" He clenched his fist, feeling the rising power within, gaining a bit more confidence in his heart.
...
A moment later.
In the bathhouse.
The steam was rising, and Jiang Ning lay on the edge of the bath, enjoying himself.
Lv Yi kneeled by the edge of the bath, vigorously scrubbing Jiang Ning's back.
"A bit harder!" Jiang Ning squinted his eyes slightly, quietly enjoying the rare opportunity to indulge.
