Wu Gang took a deep breath, his eyes slightly squinted, and the silver needle mixed with True Qi was inserted into the acupoint by Wu Gang.
Wu Gang's eyes remained wide open as he stared at the silver needle, and sweat had already appeared on his face.
Trying to insert the silver needle even a tiny bit more required utmost precision, which in itself was a very difficult task.
Moreover, it was even more difficult under the condition that Yang Feng was circulating his Inner Strength.
At this moment, the True Qi within Wu Gang was circulating wildly, and the silver needle was entering at a visible speed.
The continuous influx of True Qi caused a dense fog to form around Yang Feng and Wu Gang, which gradually turned black.
This was, with the enhancement of True Qi, the transformation of the toxins in Yang Feng's body into fog to be expelled from the body, which would not cause much harm to Yang Feng.
The process of treating Yang Feng took a full hour.
