"Wait." An Ran unceremoniously pushed Lin Mao's hand away and said lightly, "Did you misunderstand something?" I didn't break my promise.

"Please repeat our bet again."

Lin Mao said, "The gambling contract clearly states that if you lose, you will not be allowed to step into this police station, don't afford to lose!" ”

"Clear?" Enron shook his head.

Then An Ran projected the day's surveillance in front of Lin Mao.

Lin Mao in the surveillance said, "If you lose, don't come here again tomorrow." If you win, I'll resign. ”

As soon as he arrived here, An Ran turned off the projection and said, "Understood, the bet clearly said that you can't come to work tomorrow, tomorrow is today's yesterday, I kept my promise yesterday and didn't come to work yesterday, why can't I come today?" Do you want to break the contract? Who are the people who can't afford to lose? ”

Lin Mao gritted his teeth and said, "Despicable! ”

"Despicable? It's not that I'm mean, it's that you're stupid. An Ran glanced at him lightly, and then left, "Xue Yin and I just happened to have a mission, so I won't accompany you." ”

Then Lin Mao saw Xue Yin standing at the door and waved sweetly to An Ran.

Lin Mao's face was gloomy to the extreme, his fists were clenched, and a few words burst out from between his teeth, "I will kill you......"

……

Saturday, June 6, 2015.

An Ran sat on a wooden bench in the city square, and Xue Yin snuggled into his arms.

The two of them acted intimately, but from time to time they glanced solemnly at the black car parked not far away.

Sitting in there was their watchman. They disguise themselves as couples and spy on each other in a potential crowd.

"I said, what did you just talk to Lin Mao?" Xue Yin asked curiously.

"Nothing."

Xue Yin knew that An Ran would answer like this, so she replied dissatisfiedly, "If you don't say it, forget it, I'm not happy to hear it." ”

So what do you ask? An Ran glanced at her lightly, thinking to himself, a woman's way of thinking is really strange.

"Now for you a news ......"

Enron noticed the news alert on the big screen in the center of the square.

"The latest news from the patrol army, Zhan Weixing, a scientist from the Spatio-temporal Forecasting Department, suddenly resigned, and the reason for his resignation is under investigation...... Now Zhan Weixing himself has accepted the ...... of erasing his memory"

Erase your memory is for sure, otherwise let a scientist with state secrets in his head run around outside, what if he wants to commit treason on a whim one day? Enron knew this, so he naturally didn't think it was strange that they would do it. Then he saw the next piece of news.

"According to the latest news from the Department of Temporal Forecasting, there will be another massive thunderstorm in Antarctica, similar in size to the one that split Antarctica in 2012. The Department of Temporal Forecasting recommends that all relevant departments enter the S-level alert armed preparation ......"

Doomsday Strait, since that thunder and lightning split Antarctica, there is one more strait in the geography of the world.

The news says that there will be a thunderbolt of the same magnitude as in 2012, which means that the world will experience another apocalypse. Although the current technology can no longer be compared with the past, people still can't help but shudder at the thought of having to go through 2012 again.

An Ran paused. Once again, the end of the world? So this time...... Could there be any new discoveries? It may be possible to solve the mystery of Unknown's background.

"Future Man...... Time paradox ......" An Ran muttered to himself, and then could only sigh.

"Huh?" Xue Yin poked her head out curiously, "What is the time paradox?" ”

"......" glanced at her lightly, and his eyes of contempt seemed to say, lonely and unheard. He replied, "Nothing. ”

"Why is this sentence again, why do you say that you are so rigid, it's really annoying." Xue Yin was dissatisfied.

An Ran turned his face slightly to look at Xue Yin, suddenly became interested, and said, "Do you think there will be a time machine?" ”

Xue Yin thought for a while, "Of course there will be, after all, the future technology is not what we can imagine." ”

An Ran smiled slightly, "Then if you have a time machine now, you use the time machine to go back ten minutes ago, and then find yourself ten minutes ago and meet her." So let me ask you, will you have such a memory of meeting another self in your mind ten minutes from now? ”

Xue Yin said without thinking, "Of course there will be." If I use the time machine to go back and see myself ten minutes ago, it means that I have seen myself ten minutes ago. ”

"You already saw yourself ten minutes ago? That means you'll have this memory in your head ten minutes later, right? An Ran smiled and said, "Then if, ten minutes later, you don't take the time machine back to ten minutes ago for various reasons, and you won't meet yourself ten minutes ago...... So, where did this memory of you meeting yourself ten minutes ago come from? ”

"Alas......" Xue Yin was dizzy by An Ran.

An Ran thought for a while, and then said, "Let's put it another way." If you used the time machine to go back ten minutes and kill yourself, why are you still alive now? You had been killed by yourself ten minutes ago, and you are still alive now. This creates a contradiction that, in general, is the paradox of time. If a time machine could be built, how would this contradiction be explained? ”

Xue Yin nodded in a good manner, "In other words, a time machine can't be built." ”

An Ran waved his hand, "You can't say that." The slow clock effect in the theory of relativity clearly states that it is possible to travel into the future, as long as the speed is close to the speed of light. Theoretically, superluminal speed can turn back time, but the speed of light cannot be surpassed, the speed of light is the fastest speed in the universe, just like absolute zero is the lowest temperature, there is no temperature lower than absolute zero, so there is no superluminal speed. Therefore, the above mentioned time travel to the future is only a unilateral slowdown of your own time, in other words, if you use the clock slow effect to wear into the future, you will not be able to wear it back. ”

"What's the clock slow effect?" Xue Yin asked curiously.

"Alright, alright!" An impatient voice came from the two of them's headphones, "You two have a good chat!" What kind of time paradox, the clock slow effect, is there such a spy on you! ”

Hearing this, An Ran stopped talking and continued to monitor the black car. After all, the criminals have hostages in their hands.

And it was at this time that the change happened.

In the cloudless sky, a loud bang suddenly sounded!

Whew!

Like the terrifying scream of the devil, hovering in the sky, unwilling to fade.

"Ray?!"

An Ran was all too familiar with the sound, his face suddenly cold, he stood up, and glanced around.

The passers-by around were obviously stunned and looked at the sky.

What happened......

An Ran's pupils shrank, the clear sky, and the summer sun fell, still shining hotly.

Nothing happened.

Enron didn't see the shadow of Unknown. He scanned his surroundings more closely, cold sweat sliding down his forehead.

Thunder on a sunny day, if it is not unknown, how to explain it?

An Ran glanced at that direction, and the thunder and lightning just now were roughly in this direction. Without further thought, he hurried in that direction.

"Hey! What are you doing! What to do with the hostages! The commander's voice rang through the headphones.

Enron took off the headphones and threw them on the side of the road.

Xue Yin looked at An Ran worriedly, and plucked up the courage to follow.

"Hey! You are disobeying orders! There is a punishment! ”

Xue Yin ignored it and ran to a corner with An Ran.

An Ran looked around anxiously, looking for it in a hurry. Unknown must be around here!

An Ran searched everywhere, and the cold sweat on his back broke out again.

No? How can it be......