Ye Wudao held a Blackwood Needle and pierced He Tiansheng's liver area with it. He then began to use the Micro-Vision Technique to observe He Tiansheng's liver.
The Micro-Vision Technique was similar to a high-powered microscope that could infinitely magnify parts of the patient's body, enabling Ye Wudao to understand the situation.
However, the Micro-Vision Technique wasn't a microscope; it belonged to Taoist Techniques. It meant Ye Wudao's vision could enter inside He Tiansheng's body, something a microscope could never achieve.
Ye Wudao saw He Tiansheng's liver wriggling and, under the Micro-Vision Technique, the cancer cells couldn't escape his eyes. Originally, Ye Wudao had thought to remove He Tiansheng's cancer-ridden liver and then use the Life-saving Fruit to temporarily preserve He Tiansheng's life followed by a liver transplant surgery.