Shi Lei did not dare believe that such a move actually existed in this world. After all, it sounded somewhat mystical.

However, thinking about the Yin And Yang Power on his body, it seemed this was even more inconceivable than the peeping technique.

Perhaps, this world already had many secrets, but before he came into contact with it, he had never believed it. Now that he had the power to know it, he naturally knew more.

But how in the world did he learn this Internal Reflection technique?

After the Divine Doctor finished speaking, there were no other movements. Shi Lei wanted to know if there were any clues regarding the insight technique that couldn't be determined.

Shi Lei had always thought that Zhang Zhongjing only said those words in advance. However, after hearing him say it out loud, Shi Lei sat down on the ground and started complaining about Zhang Zhongjing's irresponsibility.

This was also in Yellow Stone Valley. If someone outside heard Shi Lei saying this to Zhang Zhongjing, they would probably be furious.

As one of the ten great genius doctors of ancient times, Zhang Zhongjing held a very high position in Chinese medicine, and could be said to be the ancestor of many people.

However, what he did not expect was that Zhang Zhongjing seemed to have heard everything Shi Lei said. Laughing, he said: "Why, are you so impatient already?"

"I'll go!"

Shi Lei, who was initially stunned by the sudden laughter, did not come back to his senses. After being shocked, he asked again: "No, you are an old man in real life?"

Zhang Zhongjing was a member of the Eastern Han Dynasty, and more than a thousand years had passed since then. If such a person was still alive, then the Eternal Growth Pill of the Chinese Medicine Competition would only be dregs.

"No, no, no. This is just a clone I left behind in Yellowstone Canyon."

Clone?

Shi Lei didn't know whether to laugh or cry, "Do you think this is a fantasy novel?"

Zhang Zhongjing smiled slightly, then said: "After so many years, this clone of mine can only live in Zhang Tianyi's residence in Yellow Stone Valley, which is a place that is cut off from the rest of the world."

"All these years, my only goal was to find someone who could inherit my legacy."

Zhang Zhongjing said with a sigh, "The < Treatise on Typhoid Diseases > is currently only a part of it, and more of it requires the cooperation of the Internal Reflection technique. And in all these years, the only person who has had the qualification to learn it is you."

"Me?"

Shi Lei was a little excited, but he was still a little nervous.

"You are a genius doctor, you definitely can't lie to me. What's more, my goal this time is to retrieve the Yunqi Flower s and return to my comrades. I can't stay here for too long."

Just as Shi Lei finished speaking, a shadow flashed in front of his eyes.

"You've been here all along!"

Shi Lei's eyes opened wide today, and when he looked at Zhang Zhongjing, his mouth was wide open, as if he did not dare believe his eyes.

Zhang Zhongjing had a saintly look on his face, not much different from the paintings he had seen in the books. The determination between his brows could still make people feel the aura from his body.

"Where did you get this Yin And Yang Power?"

Zhang Zhongjing did not bother to respond to the shock in Shi Lei's eyes, and asked instead.

"Me?"

Shi Lei thought for a while, wanting to say out the things regarding Yin Yang Zhenren, but after thinking about it for a thousand years, it was possible that Zhang Zhongjing's so-called clone was just staying in Yellowstone Canyon. Maybe he didn't know anything about Yinyang Zhenren, so he decided to put it simply.

Thinking about it, Shi Lei took out the purple pearl from his bosom, and said: "This was left behind by a master cultivator of the Yin And Yang Power, I don't know why but I have it on me for some reason."

"Haha, fate. It's fate." Haha, fate.

Zhang Zhongjing laughed loudly.

I know him. It's just that he wholeheartedly wants to improve his strength and is unwilling to join the path of Chinese medicine. It can only be said that there is no fate between us.

Zhang Zhongjing suddenly retracted his expression, looked at Shi Lei and said: "Child, are you willing to learn the insight technique to benefit the world from now on?"

For the good of the world?

Shi Lei laughed: "Elder Zhang, speak the truth. Regardless of whether or not I have an inner observation skill like yours, ever since I entered into this business, I have confirmed that I will be able to help the world with my life."

He looked at Zhang Zhongjing and continued, "The reason why I promised you to learn the Internal Reflection Technique is entirely because of my friends. They were struck by the plague poison, and it's said that this is the only method to solve the problem."

Zhang Zhongjing nodded with satisfaction and walked to the front of Shi Lei, without saying anything unnecessary, he directly said in a deep voice.

"Now close your eyes and feel the Yin And Yang Power in your body."

After saying that, Zhang Zhongjing slowly moved his hands up Shi Lei's Dantian, and said at the same time: "Sensing the location of the Yin And Yang Power, try to follow the traces that have been left behind, and guide the Yin And Yang Power to the eyes."

Shi Lei acknowledged, then nodded his head, and started to focus on the Yin And Yang Power, wanting to see how it will work.

Zhang Zhongjing nodded his head slightly, then retrieved a silver needle from his body, and pierced a few needles at Shi Lei's temple and under his eyes, on the cheeks.

"It hurts a little."

Shi Lei screamed.

Zhang Zhongjing said coldly: "Endure, the last step."

Shi Lei felt as if thousands of silver needles were piercing his eyes, making him feel unbearable pain.

But after hearing Zhang Zhongjing's words, Shi Lei could only endure it.

"How much longer is left? I really can't take it anymore."

Shi Lei closed his eyes. He did not know what was happening in front of him, nor did he know what Zhang Zhongjing was doing.

The second like year of experience did not continue, after an unknown amount of time, Shi Lei finally heard Zhang Zhongjing's voice.

"It's all right now."

It was unknown if it was because of the Yin And Yang Power or not, but Shi Lei could always faintly feel that his pure Yang body had some sort of reaction and change.

But luckily it wasn't too intense, so Shi Lei didn't think much of it. After opening his eyes, Shi Lei didn't feel anything different. Just when he was about to ask Zhang Zhongjing, he discovered that the latter's body had become much more illusionary.

"What's the matter with you?"

"It's fine, it's normal."

Zhang Zhongjing said, "The biggest benefit of the Internal Inspection Technique is that I can quickly find the condition of the patient's body and apply the medicine right away. This is my own < Treacherous Typhoid Theory >."

As Zhang Zhongjing spoke, he took out a book and placed it in Shi Lei's hands.

"This is different from the ones outside, many of them require Yin And Yang Power s to use, and the Yunqi Flower s here are all on the trees, you can see them with your Internal Reflection Technique."