After elder sister's husband Wu Lin was rescued, he clung persistently to Beigong Yu, begging to learn martial arts.
Exasperated by the constant badgering, Beigong Yu eventually drew upon Wu Lin's physical constitution and temperament to casually create a mental cultivation method named the *Wu Classic*, which he tossed to Wu Lin for cultivation.
Once he obtained the *Wu Classic*, Wu Lin became utterly obsessed. He ate and stayed at the Old Han residence, practicing the *Wu Classic* in the spacious courtyard at every available moment.
Chapter 1318