C300 An Old Friend of Another Country

Duan Hong had been thinking about the 12 scriptures the whole night. Why did he suddenly disappear without a trace when he got his hands on the Sun Small Intestine Meridian and the Shaoyang Triad through his back?

In other words, why was the greater vertebra acupoint like a black hole, insatiably devouring his internal energy?

The greater vertebra acupoint was only an acupoint on the back