"On the evening of April 11, 2023, at 11:56 PM, a plane crashed over the Sea of Japan. The whereabouts of passengers Chen Ya and Asai Ruriko are unknown. This is the history of the parallel world I live in."
After Su Xiaonuan finished speaking, the entire plane cabin fell into deathly silence.
Qin Yunchu stared at her intently, wanting to see the happy expression on her face that her prank had succeeded.
But Su Xiaonuan was very serious from beginning to end.
"What do you mean?" Chen Ya finally asked, "Are you saying you traveled from the future?"
"No, no," Su Xiaonuan said, "It was the future that activated the time reverse engineering and sent me here."
"Hiss..." Jiang Xinhai made a sound that was extremely terrifying.
In fact, Chen Ya had thought about a question a long time ago - Am I the only time traveler in this world?
Am I the only one in this world who possesses the so-called "Life Achievement System"?
When we are young, we always want to believe that we are the chosen one, but the older we get, the easier it is to realize that if we are really the chosen one, then the "sky" that has never shown its face is the most terrifying existence.
The wisest always remember to ask, “So, what’s the cost?”
When Su Xiaonuan said that, Chen Ya realized that the price had been waiting for him for a long time.
Chen Ya said, "Explain it."
Su Xiaonuan glanced at the time and said, "Okay, then I'll explain it briefly. Xiaoyou, do you remember the Fermi Paradox I mentioned to you?"
"I remember." Xia You nodded. "If the universe is infinite, then aliens will definitely encounter us, but so far no aliens have appeared."
"Similarly, if humans invented a time machine, we'd definitely be able to meet people from the future," Su Xiaonuan said with a smile. "In an era like this, with emerging technologies everywhere, and every source of technology leading to a remarkable scientific achievement, this place should be filled with future talent."
Everyone held their breath, and Jiang Xinhai couldn't help but ask, "Then what's the reason?"
Su Xiaonuan said, "Because your era is equivalent to the prehistoric era compared to the future when time machines have already been invented. At this time, even the theory of manufacturing time machines has not yet been born."
After a pause, she explained, "Our academic community generally believes that the conditions for building a prototype time machine won't be available until the end of the 22nd century. Even if people from the future come along and come up with a theory, they won't be able to speed up the process.
"Let me explain the operating principle of our time machine. Our time machine has a transmitting end and a receiving end. Whether it is moving back in time or moving down in time, a signal will be sent to the receiving end in advance to allow them to prepare in advance. The energy consumption is provided by the upper end."
Su Xiaonuan used two fingers to represent the time before and after, and explained:
"Because of the structure of a time machine, the upper time always provides less energy, and much less. Your era doesn't have time machines, and there are no receivers. Therefore, sending anything to your place would require an extremely huge amount of energy consumption, which is impossible for private individuals to do. Therefore, sending people to your place will basically not happen in the future."
There was too much information in Su Xiaonuan's words. Even if everyone on the plane had a high IQ, it would still be very difficult to understand what she meant.
Chen Ya asked, "Then why did they send you here?"
Su Xiaonuan smiled and said, "Actually, they didn't send me here. What they sent was the chip in my brain."
She pointed to her head and said, "Chen Ya, do you remember my family's situation? How did I get here?"
Chen Ya was dazed for a moment and said, "You were picked up. You were adopted by my next-door neighbor."
"Yes." Su Xiaonuan said, "In order to allow me to fully integrate into this world, the future chose to send me here as a baby, and a chip was implanted in my brain at that time.
"The chip is loaded with a wealth of knowledge about the future world, and it guides me step by step in understanding and completing my mission. It was slowly unlocked as I grew up, and it wasn't until five years ago that it was fully unlocked."
Chen Ya fell silent.
No wonder he felt that Su Xiaonuan was special very early on.
Every time he didn't see her for a while, he felt that Su Xiaonuan had changed. At that time, he thought all girls were like this.
Su Xiaonuan continued, "It seems everyone has accepted the fact that I am from the future. Now, let me tell you about my mission. My mission is also very complicated and is related to everyone here. I hope everyone will listen carefully."
Everyone took a deep breath, and Su Xiaonuan's small class began again:
"Just now I talked about parallel worlds. In this era, there is also a theory of parallel worlds. It means that when time and space change, an infinite number of parallel worlds will appear... This is nonsense, but it is similar to the real theory of parallel worlds.
"The concept of parallel worlds only exists relative to time travelers. Only through time travel can we discover the existence of parallel worlds. Theoretically, there should be an infinite number of parallel worlds, but they are all deeply hidden from each other.
"According to future research, only two parallel worlds have been discovered. One is the world dominated by the space-time technology I live in, which we call 'finite space-time'. The other is the world dominated by space-warping technology, which we call 'infinite space-time'."
Qin Yunchu pressed his forehead and said, "This is such a huge amount of information. I'm starting to feel overwhelmed."
Su Xiaonuan smiled and said, "I had the same reaction as you at the time. You can simply understand it as one world has a time machine and the other world doesn't."
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