This was only the beginning. If he wanted to have a miraculous effect after inserting the needle into the acupuncture point, he still needed to know how many inches it was best to insert the needle, as well as the technique, time, and weight of the acupuncture.
"One needle hit gui gong and stopped. The left needle went down and the right needle went out. Under the thumb of the second hand, insert the needle in gui xin till it's thirty percent in."
If it were anyone else who studied, they only needed to know the basic depth of the stab. However, to Su Yun, this was far from enough. After all, the Thirteen Needles of Hellgate could not only be used to save people, but also to kill.
Therefore, Su Yun would always ask Doctor Lü, "What if this Gui Xin acupoint is pierced more than 30% deep? Master, please guide me."
