The human body has the twelve regular meridians, the eight extraordinary meridians, and three hundred and sixty-five regular acupoints. Moreover, doctors continually discover that beyond these three hundred and sixty-five acupoints, there are many more, totaling over a thousand.
However, in terms of meridians, there has been no such advance; not a single new one was added.
Old Man Yan, on the other hand, was different. Aside from the twelve regular and eight extraordinary meridians, he discovered thirty-six Hidden Meridians and one hundred and eight Hidden Acupoints.
It's just that these thirty-six Hidden Meridians and one hundred and eight Hidden Acupoints change with the flow of blood in the human body, which is why no one has been able to discover them. Even if someone did discover them, they were unable to systematically categorize them to form a medical system.
The needles that Liang Jingxian just inserted were in the Hidden Meridians and Hidden Acupoints.