Everett stood up. "Alright, Ye, the real distance is obviously more than a thousand miles. Because," he walked to a table and rummaged through the papers, books, and stationery on its surface until he revealed a clear space, then pulled out a blank sheet of paper and beckoned Ye Youxiao over.

Everitt sat down at the table, his pencil swinging back and forth: "Theoretically speaking, space and time are two dimensions, and they cannot be converted into each other. It's like we can't say that one hour equals 5 kilometers or 1000 kilometers."

Ye Youxiao can't comment because he didn't understand.

Everett drew on the paper as he said, "Leaf, let's explore this world together. It's a three-dimensional world! A world made up of length! Height! And width!"

Ye Youxiao nodded, looking seriously at the piece of paper as if it could perform magic.

Everett wrote a large "t" on the paper: "What if we add a dimension, time! What would happen?"

Ye Youxiao retorted, "You just said they are of different dimensions." Finally having a chance to speak and using a contradictory approach to attack the other party, Ye Youxiao felt a sense of satisfaction brought by the balance.

But Everett wasn't worried or flustered: "But you did it."

Ye Youxiao was taken aback. "Me?"

Everett smiled with narrowed eyes, and Ye Youxiao suddenly found his squinting expression very interesting, but he immediately followed up, "You said I added the time dimension? But I didn't..."

Everett chuckled slyly, "Because you've crossed over."

Everett drew two circles on the blank paper, then drew a straight line connecting them. He took off his glasses and looked, then put them back on. "Well, now you look," he said.

Ye Youxiao bent down to look, but Everett quickly drew a large circle. Ye Youxiao found it rather amusing, as the circle was not very standard.

Everett also laughed. "Haha, please forgive my description of our world, it seems so unreal. But that's okay, we're just a simulation."

Ye Youxiao didn't want to attack him on this issue, so he nodded in agreement.

At that moment, Everett scribbled a number on the edge of the circle: 94000000, sporting a mischievous grin. "Ye, read out this number," he said.

Ye Youxiao was quite satisfied with the way Everett called him. The pronunciation of "Everett" sounded very similar to "ye," which is a term of respect for elders in Chinese. It seemed that Everett's language system didn't include an explanation of Chinese homophones. Every time Everett called him this, Ye Youxiao felt a strange sensation. Of course, he found it boring and even a bit despicable, but he couldn't help but like the way Everett addressed him. "Try it yourself," Ye Youxiao thought, "The feeling of being called 'ye' is really good."

As for this number, he almost blurted out: "940 million."

Ye Youxiao glanced at Everett with disdain: "Don't you know that we used to recite these things that ordinary people can't even fathom back when we were in elementary school?"

Everett calmly added the letters 'km' after the number: "Right, that's it. So what does this mean?" He asked himself, "This is the average speed of Earth's orbit! Good heavens, can you believe it? This clunky-looking thing that seems like it never moves an inch, actually runs 940 million kilometers every year!"

Although the numbers are quite large, Ye Youxiao remains unmoved. He keeps his composure and feels good about it. What does the speed of the Earth have to do with me?

It seemed that Ye Youxiao's composure made Everett feel frustrated. He spoke in a hurried tone: "Well, let's now officially delve into this. The Earth runs 940 million kilometers every year, so what is its speed per second? Almost 30 kilometers per second! Now, Ye, tell me, do you still believe that time and space are not interchangeable dimensions?"

Ye Youxiao was a little dizzy and didn't answer for a moment.

His performance seemed entirely within Everett's expectations, so Everett was essentially asking himself: "There is a problem with negative energy here. If the Earth's speed of 30 kilometers per second is positive energy, then according to my rough estimate, a negative energy speed equal to 30 kilometers per second would stop time; greater than 30 kilometers per second, time would rewind; if it reaches 60 kilometers per second, one month later you would return to one month ago; one year later, you would return to one year ago; If the negative energy exceeds twice the speed of positive energy, it will return twice as far back; exceeding ten times, it will return ten times… and so on. Like you, having traveled a millennium, you should have more than a thousand times the negative energy."

Ye Youxiao heard the name and said, "Several tens of kilometers per second? Everett, aren't you joking? Bullets aren't that fast, and planes don't seem to be that fast either."

Everett interrupted: "So none of them flew into the past, not even a thousand years ago."

Ye Youxiao stopped talking. He vaguely sensed that the complexity and difficulty of this matter seemed to far exceed his imagination.

Everett continued to marvel, "We often talk about three cosmic velocities; even escape velocity is only 11.2 kilometers per second; even the third cosmic velocity, which is the speed to escape the solar system, is still only 16.7 kilometers per second. And your speed to travel to the past, a thousand years ago, actually reaches dozens of kilometers! God, I can't believe it's true."

Ye Youxiao interrupted his sigh: "As long as there is this kind of super speed, can you travel anywhere?"

Everett smiled: "My friend, that's a very good question. Now let's take a look at these two circles." He made a measuring gesture between the two circles: "Well, 36 centimeters, isn't it?"

Ye Youxiao could only say, "It's about the same."

Everitt swiftly rolled up the paper, aligned the two circles, and then pierced through the paper with his pencil tip: "Now, between them, there is almost only 1-2 millimeters of distance. You know, I used a pencil tip, in fact, it was probably just a small bug that bit through the paper, so this hole, we call it a wormhole."

Ye Youxiao didn't know what he wanted to say.

Everett: "If there are such holes between two different times and spaces—of course, from your experience, this hole does exist, doesn't it?"

Ye Youxiao wasn't able to refute: "It's possible."

Everett exclaimed, "Of course! You obtained a massive amount of negative energy from the Xingzhen Temple, which brought you to Tang Dynasty's time—however, I regret to say that I can't calculate exactly how much that negative energy is."

Ye Youxiao smiled, he finally had the chance to teach this big guy a lesson: "Everett, you're so stupid. I traveled back a thousand years, since the Earth's orbital speed is 940 million kilometers per year, then multiplied by a thousand, wouldn't that give me my travel speed? My weight, mass 40 kilograms, what about the thrust?"

Everett smiled, "Yes, I didn't even think of it! It's all because of this wormhole! Kinetic energy, kinetic energy... Your speed can only be calculated at 29.8 kilometers per second, 40 times 29.8 squared, divided by 2..." He quickly scribbled calculations on paper with a pen and arrived at the answer: 17760 joules.

Everett unconsciously drew nonsensical shapes on the paper with his pen, mumbling to himself, “although it has dozens of times more k.i.c energy than bullets, is this really enough?”

This guy actually said he doesn't speak Chinese but only black language! It's obvious he's taking advantage of my poor English skills!

Ye Youxiao couldn't help but pat him on the shoulder: "What did you say? I didn't understand."

Everitt smiled. "Sorry, I was thinking, this 17 kilojoule kinetic energy, could it really send you into a wormhole and travel through millennia? Although this energy is dozens of times greater than that of a bullet leaving the barrel, I still can't be sure."

Ye Youxiao recalled his grandfather's words: "However, Everett, we should focus on the key points, the crucial aspects, and not waste time on trivial matters."

Everett looked at him and began, "First, from your description, I know you fell in the wishing pool. But if falling could grant such tremendous kinetic energy, I can't imagine it, because it goes beyond all scientific understanding. So I can only understand it as a miracle created by God: a supernatural force that gave you superkinetic power."

Ye Youxiao nodded, listening intently to him.

"Secondly, you used this powerful negative energy to travel through time and arrive in the Tang Dynasty."

When Ye Youxiao thought about the hardships of this period, his face immediately turned grim.

Everett nodded. "The most wonderful thing is, thirdly, you gained immense positive energy and came here."

Ye Youxiao: "Positive energy?"

Everett waved his hands excitedly: "Of course it's positive energy! It lets you travel a thousand years into the future! Think about it, the future, a thousand years from now! How romantic, how wonderful, how peculiar! Who could imagine?"

Ye Youxiao was a little dazed: "I don't think I'm that fresh..."

Everett hurriedly said, "That's because you originally traveled from this era to the past, so this era isn't that strange a future for you. But think about those people from the Tang Dynasty, if they came here instead of your people from the Tang Dynasty, could they understand this era?"

Ye Youxiao shook his head honestly: "I'm afraid not."

Everitt sighed, "When I saw you, my heart told me this was a research subject I couldn't pass up! So, I immediately wanted to learn more about you."

Ye Youxiao suddenly felt a bit afraid: "You said you want to understand me, but only through language exchange?"

Everett smiled. "Of course, I wouldn't want to travel like that."

Ye Youxiao piqued his curiosity again: "Why? I feel like you know more about time travel than I do."

Everitt smiled: “In your Chinese words, I am Ye Gong Haolong!”

This idiom, Ye Youxiao also learned in kindergarten: “Then why don't you...”

Everett smiled mysteriously: "Because I don't have a steering wheel, a compass, or brakes! I don't know where to get off, when to get off, and I can't control the journey! If you were me, would you get into a car traveling at dozens of kilometers per second without brakes?"

Ye Youxiao shook his head and didn't speak. Everett continued, "You must still remember the analogy we just made. Yes, a thousand miles apart, your knife can't hit the target, but it will definitely fly somewhere. Taking Chinese history as an example, it might fly to the Qin Dynasty, the Shang Dynasty, or even the dinosaur era! Haha, imagine that, if the flying knife misses its mark, and the probability of that is very high. Then you travel to the dinosaur era and hang out with those big guys, wouldn't that be a sense of achievement?"

Ye Youxiao's face turned pale, and his lips trembled slightly. "It can't be that bad, right?"

Everett chuckled, “This is what I’ve been researching—time travel,” he said, pointing to the transparent cubicle. “But it’s always been theoretical. I wouldn’t dare take the risk. I don’t think throwing myself in front of a T-Rex is a wise choice.”

Ye Youxiao plopped down on the ground. He had never imagined that traveling through time could be so dangerous. Although his current experience was already thrilling enough, compared to fighting prehistoric monsters, he felt incredibly lucky.

Everett said, "This is the harsh truth, as a friend, I have to tell you frankly. Of course, I don't oppose your independent thinking. For example, when you travel through time, do you know your destination? Can you control the speed of your journey? As the Chinese proverb says, a slight deviation can lead to a thousand-mile error. Such powerful kinetic energy propels you to another era, but you have no idea which point in time you'll land in, nor whether you might even end up in prehistoric times. Am I right?"

Ye Youxiao replied weakly, "It seems I have no choice but to stay here and find a time to return to China."

Everett smiled. "America is a democratic country where everyone can try to achieve their dreams. However, you probably can't go back to China."

Ye Youxiao put on a strong face: "Why? I'll work hard, earn a lot of money, and then..."

Everett smiled. "You misunderstand, Ye. This isn't about money, although money is certainly a factor. What I'm trying to tell you is that it comes down to something more decisive."

Ye Youxiao looked at him in puzzlement.

Everett shook his head. "The China you left in your time travel is China sixty or seventy years from now. I don't know if your grandfather is married yet, but your father should not have been born yet."

Ye Youxiao was astonished: "My father hasn't been born yet?"

Everett gripped his shoulders. "Calm down, calm down. You can just calculate this. If you arrived in 1958 America, then your father was born before 1958, right?"

Ye Youxiao almost burst into tears: "He was born in 1971, the year of the pig."

Everett nodded. "That's the butterfly effect. If you saved enough money now and went back to your hometown, your grandfather might have become your brother, and your father... I don't know if he would have even had a chance to be born."

Ye Youxiao painfully clutched his head: "My father can't be born?"

"Of course, there's another way. You could go back to China, but you'd have to live somewhere else."