"The name of that place is called 'Afterlife'." Jiang You murmured thoughtfully, "It means the world after death. Did all those historical figures come here after they died?"

"There is a possibility." Li Zhengchu joked, "Maybe you can see Zhuge Liang in the future."

"That's too outrageous." Qiao Yi couldn't help but said.

Li Zhengchu smiled but said nothing.

"Old Li, is this place we are in a dream or...reality?" Jiang You asked.

Li Zhengchu raised his eyebrows in surprise and looked at him.

"Why do you think so?"

"Because this place is too much like a game." Jiang You said, "You can get rewards for completing tasks, and there is also the infinite resurrection you mentioned.

It’s also a bit suspicious that we arrived at this place in an instant without even realizing it.”

"What is your definition of illusion and reality?" Li Zhengchu asked.

Jiang You was a little confused.

"What is...the definition of illusion and reality? Isn't illusion just illusion?"

"Then let me make a hypothesis."

Li Zhengchu continued, "Suppose that the real world you live in actually does not have substantial material existence, but is just a data world created by a more advanced civilization.

However, in that world, there are all your relatives, all your friends, and everything you know well. They all have their own consciousness and will make different choices according to their different personalities.

In another world with material existence, you have no relatives or friends. You are the only one in the world, and there are no memories of you.

Which world will you choose to stay in, or, for you, which world is fake?"

Jiang You and the other two people were lost in thought.

"The movement of the universe is just the movement of countless particles, and the flow of data in computers is also the flow of countless 0s and 1s.

To me, there is actually no difference between these two methods. They are just different life forms and different dimensions.

If it were me, I would undoubtedly choose the former."

Li Zhengchu continued.

"I won't give you the answer because I don't know what the answer is.

See with your eyes and feel with your heart.

When you think this is a real world, no matter what form it exists in.

It is real to you."

Jiang You nodded and looked at Li Zhengchu, "I've learned a lesson."

"Idealism?" Qianjun murmured in a low voice. He looked at Li Zhengchu, "You look very young, why do you have such deep thoughts?"

"I just look young. I am over forty years old this year." Li Zhengchu said with a smile.

In fact, according to the normal timeline, he and these three people are all the same age, but at this moment, the memories of the three people have returned to the past.

"Oh, yes, the bodies we use now are not the ones from the past." Qian Jun responded.

Qiao Yao suggested: "When we go back, let's leave each other's phone numbers and get together in real life."

"I have no objection." Qianjun said.

Jiang You did not answer, but continued to ask Li Zhengchu.

"Can I talk to Mr. Einstein?"

"Of course." Li Zhengchu raised his eyebrows, "We still have a high degree of freedom here, but Einstein will be there no matter what.

But the person who teaches you how to use the fifth element to mine may not necessarily have the time to teach you again and again.

Although it is a mining technology, you will also slowly learn how to use the fifth element during the mining process."

Jiang You hesitated for a moment, but still followed Li Zhengchu in.

The size of the entire cave was far beyond their imagination. They passed through several residential areas, but they were still going down.

Jiang You couldn't help but sigh, "This place is almost digging through the core of the earth."

"It's almost as deep as more than 2,400 meters underground," Li Zhengchu said.

They took a deep breath.

"How did such a backward civilization build such a burrow?" Qiao Yi complained, "They can't even defeat the gophers.

Even our TBMs don’t have this kind of excavation capability.”

"You will know soon." Li Zhengchu murmured softly.

Soon, under Anya's guidance, they entered the coal mine that Xia Lian and others had entered before.

This place has been expanded many times compared to before. Countless people are digging coal mines here with tools, and then taking them to the upper level for sorting via electric crawlers.

Anya took them to Kaike, the general manager of the mining area, and explained Sparrowhawk's order and the identities of these people.

Kai Ke accepted this task very readily.

He looked them up and down.

"Do you remember how to use magic?"

Jiang You and Qiao Yi looked at each other, and finally chose to shake their heads truthfully.

"The mobilization of magic power is actually very simple. As long as you have enough imagination, you can use magic power to manifest anything you want.

The difference is the amount of magic power lost. The lower your knowledge and lack of understanding of things, the more magic power is lost in the things you manifest.

I am not a professional magician, but I can teach you how we, the frozen people, built such a huge underground city."

After a pause, Kai Ke recalled what he had learned in those scientists' courses.

"Do you know about "shock"?"

"Know."

"Actually, all materials in this world vibrate." Kai Ke explained.

"According to Mr. Einstein, everything is composed of countless elementary particles that are invisible to the naked eye.

All elementary particles are vibrating strings.

One of the necessary conditions for the existence of matter is the irregular motion of atoms.

They all have an inherent frequency.

Have you ever seen a bottle broken by sound?"

"I understand, you are talking about resonance phenomenon?" Jiang You responded.

"I think I heard Mr. Einstein say it." Kai Kedi muttered, "But it doesn't matter, as long as you know the principle, I'm not good at teaching people after all."

This mining method was gradually discovered by them after many failures, but no one could explain this phenomenon.

The appearance of Einstein and others explained the principle of this phenomenon to them, and they transformed this magic, which also saved them the magic power consumed when using this magic.

After a pause, he continued, "And we use this phenomenon to mine minerals. There is a certain inherent vibration frequency in matter, and as long as we can create a vibration that is the same as this inherent frequency.

We can apply more powerful force to this material and make it vibrate."

Jiang You nodded and said: "I understand that energy will accumulate, just like pushing a swing. As long as you apply a small force to the swing, the swing can swing higher.

One push may not increase the force very much, but as long as you maintain this force and push it a few more times, the swing will get higher and higher.

That's how the sound shatters the bottle."

"Yes, yes!" Kai Ke said excitedly, "That's it! Let me show you."

With that said, Kai Ke turned around and punched the wall. They could clearly feel a kind of energy being transmitted from his fist to the wall.

The mine near Kai Ke was trembling slightly, and then large chunks of coal collapsed, raising large amounts of smoke and dust.

"This method actually saves mana. The energy consumed to create this kind of vibration is not high, but the difficulty is that it requires maintaining a frequency of vibration multiple times in a short period of time.

However, many people find it difficult to grasp this vibration, and usually waste unnecessary magic power."

Kai Ke turned around and smiled.

"You may need to practice more to get the feel for it."

Then, I saw three people who were deep in thought.

"This... you can find the value by just doing some calculations, right?" Jiang You said.

Kai Ke was stunned for a moment, "Calculation? Can this still be calculated?"

"There's a formula for this. It's not difficult." Qiao Yi said. After a pause, he asked, "Is there paper and pen here?"

"No need for pen and paper." Jiang You said.

He quietly stared at the coal in front of him and began to make rapid calculations in his mind.

From the beginning, he realized that the memory of the body he had obtained was very strong and the brain was very easy to use.
To be continued...