Unprecedented

In the Zhongyuan Sword there existed a detailed record about measuring acupoints and the meticulous techniques for excavating them. Although my level of cultivation had yet to truly reach the pinnacle of the Visceral Tempering realm, merely measuring the acupoints wouldn't entail any peril.

Through Chen Fei's focused mental prowess, guided by a unique vibration frequency, it began to suffuse his entire physique. The minutiae of his body started to manifest before Chen Fei.

While not part of the genuine transmission, there were still instructions for measuring and excavating acupoints, albeit lacking the same precision. The majority of the inner disciples from the Primordial Sword Sect, aspiring to advance into the Aperture Tempering realm employed such a method.