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At Hawking's home at Cambridge University, his party has already begun.

A sumptuous table of food and wine was prepared, dozens of balloons adorned the place, and Hawking sat in a wheelchair, quietly waiting for a possible "time traveler" to arrive from the future.

His nurse came up and said, "Professor, where is the banner you want?"

Hawking was in a wheelchair, using his voice synthesizer, and only replied for a while: "Hang it in the living room, and then you can take a picture of me." ”

The nurse, Elaine, has been working for him for ten years, smiling and hanging a banner in the brightly lit living room that reads "Time Travelers Welcome."

Looking at the words on the banner, Elaine smiled: "Wow, it turns out that our doctor is going to discuss the major events of the universe with the people of the future, as a Muggle, shouldn't I be there?"

"Of course, so you don't steal the salad, what you did, people in the future will know. Hawking tilted his neck and said in his unique electronic synthesized voice.

Elaine smiled even more, and she took out her phone to take a picture of Hawking, and then took a few photos of the party table, balloons, and banners.

Finally, she picked up her plate and ate the fruit salad and said, "Really, Professor, if I steal a piece, people in the future will know about it? Well, there is less salad dressing." ”

"Of course people in the future will know, because this is what has already happened to them. Hawking said.

Elaine ate a few pieces and said, "Don't you think time travel doesn't exist? I remember what it was called a protective ......."

"Timing protects conjecture, so it's a test and a joke. I know the future, but I can't go back and tell you about it. Hawking said.

"Joke?" Elaine smiled.

Hawking tilted his neck and smiled, some of his facial muscles could move, but his smile was more like a grin.

"There will be no guests. Elaine, you can eat a little first, but don't touch those ten bottles of Cook Champagne, I'm going to collect them. "Hawking finally had a showdown.

Elaine knew that this was the case, and as the scientist who disapproved of time travel the least, how could Hawking support such a thing as a future man traveling to the past?

He also took out ten bottles of Cook Champagne from his treasure, which was simply bleeding.

Sure enough, it's just a show and a pose.

Elaine said, "Professor, there was a man who was wandering outside the courtyard just now, and then he was chased away by Thomson, as if he had used your doorstep as a rendezvous place. He can't be the future, is he? Your security guard may have made you miss out on a great discovery. ”

Hawking said: "The real man of the future, he should bring my invitation. And my invitation, which only exists in my brain, will not be released until tomorrow. ”

Elaine clapped her hands and said, "Sure enough, you didn't plan on anyone to come...... No wonder you've pulled out your most prized champagne collection. ”

Hawking said: "Time travel can't be done, it has too many unexplained paradoxes, so when time travel appears, the law of cause and effect is paradoxical, and time and space collapse." ”

"I think there's always an invisible force interfering with the timing and not letting that happen!, as the Overseer of the Universe guessed. ”

Elaine said, "So you want to do an experiment before you retire and prove that time travel doesn't exist......"

Hawking grinned, and said in an electronic voice: "This experiment is not rigorous, although I firmly believe that time travel does not exist, but it must be admitted that even if the time traveler does not come, it may be that my party is not attractive enough, or it may be that the future law does not allow time travel, or it may be ...... Humanity has no future......"

Elaine shrugged and said, "Humanity has no future...... It's horrible. ”

"I'm instead hoping that the Time Traveler will come to your party and finish your champagne!"

Hawking quipped, "No! Champagne is my treasure, and I won't let them be drunk." ”

"But Professor, what would you do if the Time Traveler did come? Would you go crazy?" Elaine laughed.

Hawking grinned and thought for a long time, then said in an electronic voice: "If anyone comes to this party, I won't send out invitations!"

Elaine was stunned and exclaimed, "Eh, don't send an invitation?"

"It's a paradox like my grandmother's paradox," Hawking said. If there are no futuristic people to party, it means that time travel does not exist to a certain extent. If there's a futuristic person at the party, then I don't send an invitation, I want to know how he came with my invitation!"

Elaine was surprised: "Isn't this a paradox?"

Hawking said: "Yes, if the paradox is really allowed to happen, it is likely that time and space will collapse and cause and effect will collapse. According to my time-series preservation conjecture, either the time traveler is erased in an instant, or the universe collapses on its own, or the time machine doesn't exist. ”

"That's why the experiment I'm talking about is not rigorous, I think so, future travelers naturally know the consequences, so even if there is this technology, none of them dare to come!"

Elaine looked at Hawking speechlessly, okay...... It's thorough...... I didn't plan anyone to come.

"You've worked hard to protect your champagne...... Elaine said.

Hawking said with a deep look in his eyes: "The invitation paradox is equivalent to the grandmother paradox, it's not that I'm making things difficult, it's a risk that any time travel must face." So if you want to go to this party, you have to overcome the problem of paradox. ”

Elaine pondered, "So whether it's the universe in order not to be destroyed, or the time traveler in order not to be erased, this points to one result, and that is that no one attends this party. Even if God let him come, it would erase him in an instant,"

"That's timing preservation, so time travel doesn't exist," Hawking said. ”

"So I took out all my champagne treasures and made this bet, and I couldn't lose. Are you done with the photos? You can put the champagne back. ”

Ding dong!

Elaine had just picked up the two bottles of champagne on the table when she heard the doorbell ringing and looked at it.

At the same time, Hawking's eyes rolled slightly, staring at the door.

"It's me, Elaine. The voice of security guard Thomson came from outside the door.

Elaine breathed a sigh of relief, she thought that there was really a time traveler coming, she walked over to open the door, only to see two people walking in the door, one was a security guard, and the other was a Chinese man dressed casually.

The Chinese man bowed slightly to Hawking in the center of the living room, then showed the invitation with one hand and grabbed Elaine's skirt with the other.

Just as he bowed his head, Thomson said, "Professor, he came with an invitation to your party, and you didn't tell me what the invitation looks like, can you see if it's this?"

Hearing this, Elaine was shocked, her hands shook, and champagne slipped from her hands.

At the same time, however, the hand arrived and caught the champagne steadily.

"Professor Hawking's treasure, don't break it. The Chinese man said in fluent English and returned the champagne to Elaine.

"......" Elaine didn't dare to pick up, saying that no one would come?

She hurriedly looked at Hawking, only to see Hawking grinning, his eyes dry, and an expression of wanting to stand up!

But the synthesizer didn't say a word, he was using his small number of moving muscles to control the synthesizer, but his mind was so confused that he couldn't organize a sentence for a long time.

"Where's the Q I want to send?"

Hawking organized the language, but couldn't find the letter he wanted, and in a hurry, he thought he could->>

Send phrases directly.

“yes！yes！yes！”

Seeing Hawking say this, Thomson knew that he was saying that the invitation was correct.

"Understood, the next person who holds this kind of invitation, I will invite him directly in. Have a nice party going, Professor. Thomson said as he left, glancing at the banner in the living room, 'Welcome Time Travelers'.

Thomson smiled and thought to himself that Professor Hawking really knew how to play.

He didn't know what kind of party it was, and Hawking only told him to bring him in if anyone had an invitation.

At this moment, he was only a little surprised to see the time traveler party. There are no aliens at the alien party, and there are no futurists at the futuristic party, which is a very normal thing. It doesn't matter what the theme of the party is at all, it's the sociability that matters.

The security guard left, and Elaine was still at the door, at a loss.

Hawking's breathing became more and more rapid, and he could not speak steadily, so he could only send the phrase frantically: "Please come in, please come in, please come in!"

The Chinese man walked into the living room, bowed slightly to Hawking, and said, "Hello, Professor Hawking, my name is Huaxu, just call me 'Hua'." ”

The person who came was Huang Ji, and he was probably the only one in this universe who could bring an invitation to this party.

Hawking was dying, and the more anxious he was, the more he couldn't organize his words, and he even felt difficult to breathe at the moment.

And Elaine was also stunned, not knowing how to come and help herself.

Elaine, she was really scared.

From Hawking's reaction, she could know that the invitation was right.

What are you kidding? As I said earlier, it is impossible for someone from the future to come to the party with an invitation, and this person comes?

And as soon as he entered the door, he caught the champagne that he had accidentally dropped, and that calmness brought her an extremely terrifying mystery.

Yes, horror.

Elaine didn't know what Ye Gong was a good dragon, but her feeling at the moment was the same as Ye Gong.

Jokingly throwing a party, inviting time travelers, and people actually came......

It's like not believing in the existence of ghosts, and then doing a ritual to summon ghosts, and then the ghosts run up to them and say, "You have something to do with me?"

In fact, even people who believe in the existence of aliens, when aliens descend on their heads, their first reaction is horror.

The feeling of the worldview being impacted in an instant is an indescribable fear.

Elaine leaned her back against the door, champagne in both hands, her body stiff and her wrists trembling slightly.

She was so overwhelmed that she even forgot what she was supposed to do.

Huang Ji gave them time to calm down, came to the table, and glanced at the so-called delicacies on the table.

Well, he didn't want to eat anything but fruit......

Elaine looked at Huang Ji, who was facing away from her, and suddenly remembered such an important moment, should she take a photo?

She just pulled out her phone......

Suddenly, Huang Ji said: "Elaine, you control Professor Hawking's Twitter, it's best to get his consent before taking a photo and tweeting, otherwise it will lead to very serious consequences." ”

Standing behind Huang Ji, Elaine, who had already taken out her mobile phone, was so frightened that she threw it away instantly.

"Oh my God! What am I doing!" Elaine was really scared, taking pictures of herself and tweeting, would it cause the universe to collapse?

"Yes, yes, yes...... I can't afford it!"

"I don't mean anything else! I didn't mean to destroy the world!"

Elaine spoke incoherently, and she remembered what Hawking said about causal paradoxes, space-time collapse, and so on, and immediately remembered it.

How did the time traveler know that she was going to take a picture? Did she really take pictures and tweet in the future?

Especially when Huang Ji said 'it will lead to very serious consequences', Elaine instantly substituted herself into the kind of fool who is common in movies, almost destroying the world because of ignorance.

She was obviously thinking too much, since the future man was standing in front of him, the so-called timing protection was completely untenable.

"Calm, the universe is strong and will not collapse so easily. Huang Ji put down the Cook Champagne and picked up a plate of fruit salad.

And at this moment, Elaine knew that she was going to entertain, and hurriedly came to the table.

What is extreme is the plate of fruit salad that he had eaten before.

Elaine wondered if she should tell the other party that she had stolen the plate of fruit.

As a result, he saw that Huang Ji directly handed the plate to himself.

"This is what you prepared, of course you can eat whatever you want. Huang Ji said.

Elaine was stunned, she didn't say anything.

Huang Ji added some salad dressing and said, "It's almost there now." ”

"......" Elaine trembled and took the fruit salad.

Sure enough, will people in the future know that they will steal fruit salad?

When she ate it secretly before, she did complain about the lack of salad dressing.

Elaine silently put the Cook champagne that was about to be put away and put it back away, and instinctively shook it, ready to open the bottle.

"No need, I don't drink, let's let Professor Hawking continue to collect. Huang Ji said.

Elaine's hand stiffened and looked at Hawking.

I saw that Hawking's mouth trembled in a hurry, no, he had difficulty breathing.

Elaine immediately came to Hawking's side, she knew that Hawking's health had been very bad recently, and even on April 6, she canceled her visit due to illness, and then went to the hospital for hospitalization.

"How's it going, Professor, do you want to go to the hospital?" said Elaine instinctively as she put him on a ventilator.

Hawking was speechless, what hospital did he go to!

He'd rather die than just eat fruit after the time traveler comes!

He also blamed himself for not being ready for the time traveler to really arrive, so that both he and Elaine were so at a loss.

Elaine's nervous mind went blank, and he was also breathless, unable to utter a complete sentence for a long time.

At this moment, Huang Ji walked up to him, ate oranges with one hand, rubbed Hawking's throat with the other, took a soft cushion to raise Hawking's neck a little, and inserted a needle into his hidden hole.

Suddenly, Hawking felt a lot more comfortable, he still couldn't move, but his breathing was smooth.

He looked at Huang Ji carefully again, and the Chinese in front of him looked ordinary and dressed casually, but there was an indescribable mystery and confidence.

Hawking had fantasized about meeting the time traveler countless times, but he never imagined that the other party would be Chinese.

But when you think about it, there seems to be an unexpected but reasonable sense of appropriateness.

"Welcome!Hua, I'm sorry, I didn't expect to really come......" Hawking finally uttered.

Huang Ji smiled: "I still have an hour and a half to accompany you, you don't have to be too excited." ”

"Aren't you afraid of changing history?" Hawking didn't care about Huang Ji's miraculous medical skills to relieve his symptoms, he had too many questions to ask.

Huang Ji said: "History cannot be changed, it can only be created. ”

......