"Ji Jiang, I'm going back to school, I can't cook, I'll order takeout for you."

Lin Chaoxi said to Qiao Shan after making the call.

"I'll just order it myself." Qiao Shan looked at Lin Chaoxi, who was packing his backpack, and asked, "You want to resign?" ”

"Hmm!"

Lin Chaoxi nodded, and smiled with some relief: "Go and go through the resignation procedures!" The director also wants to take care of my regularization and let me go on a blind date with his nephew! The old lady is gone! ”

This was a bit arrogant, and Lao Lin, who was eating melons on the side, lay on the sofa and gave Lin Chaoxi a thumbs up: "Heroine of the female middle school, classmate!" No problem! ”

Lin Chaoxi and Qiao Shan looked at each other and smiled.

……

……

As soon as Lin Chaoxi left with his front foot, the bunk bed purchased online on his back foot was delivered.

According to the arrangement of the cheese world, Qiao Shan put the bed in the living room, cleaned up, and half an hour passed.

In the process of tidying up the room, Lao Lin, who had Alzheimer's disease, was also easily handled by Qiao Shan.

Because Lao Lin had always thought he was a twenty-year-old young man after he was injured, living in 1993, Qiao Shan simply told him directly that he had crossed over, and then threw him in front of the computer.

"Eat, Lao Lin!"

After tidying up the living room, Qiao Shan shouted at Lin Chaoxi's room.

The computer was in Lin Chaoxi's room, Lao Lin was watching the 1994 ball game with relish, hearing Qiao Shan's shout, he walked out in three steps and one turn, looked at the sumptuous meal on the coffee table, immediately rubbed his stomach, sat down, rubbed his hands, and said happily:

"It's quite rich, there are fish and meat!"

Qiao Shan smiled and handed over an unopened disposable fast, and said, "Isn't this a welcome to 2018!" ”

"Invincible Begins with Sacrificing to the Ancestors"

"Tsk! Don't say it! Lao Lin sighed with emotion: "Your era is more developed than ours in 1993!" Look at the computer system, and the smartphone! I couldn't have imagined it at the time! ”

Johnson: "......"

You're a bit like that!

If I hadn't been sure you were Alzheimer's, I would have thought you had crossed over!

But......

Qiao Shan turned his head to look out the window, as if he had swept through time and space, looking at an unknown time and space, and there seemed to be starlight in his eyes.

Time is still ticking in the world of cheese......

……

……

Cheese World.

Qiao Shan, who incarnated as a small party and loved the people, knocked on the bedroom door, stood at the door, waited, and Xiaolin's voice came from inside: "Come in." ”

Pushing the door in, looking at Xiao Lin Chaoxi who was shrunk at the foot of the bed, Qiao Shan said softly: "It's time to eat......

Lin Chaoxi clasped his hands on his knees, looked up at Qiao Shan, his eyes were a little less mature as an adult, and a little more childish at this age, and said sullenly:

"Won't Lao Lin come back at noon?"

Qiao Shan sat on the edge of the bed: "He has an academic conference, and he will come back in the afternoon, so let the two of us go to the restaurant, but I think my craftsmanship is better than the master in the restaurant, so I made you a dark meal." ”

Lin Chaoxi couldn't help but smile, but quickly disappeared.

Looking at the dull Xiaolin Chaoxi, Qiao Shan thought for a while and asked, "Are you still afraid?" ”

Lin Chaoxi shook his head, bit his lip, looked at Qiao Shan, took a deep breath and said, "I know that she didn't take the initiative to come over, and she also helped me find my father, in fact, I am quite grateful to her." ”

"That's because I'm worried that my studies have dropped ......"

Qiao Shan thought for a moment, shook his head and smiled: "Indeed! She relied on herself to be an adult, lifted you high, and now that she has become a scholar, you must be very uncomfortable now! ”

Lin Chaoxi covered his face and sighed.

She's really bothered by this right now!

It was Strawberry Lin Chaoxi who won the gold medal in the Jin Cup Olympiad, the adult version of Lin Chaoxi, and her cheese Lin Chaoxi is just an ordinary child, just an orphan who has just found a family, she is not a genius, nor is she a scholar.

"I'll help you tutor after eating?" Qiao Shan smiled and asked: "The content of primary school is still very simple, with me, you can rest assured, make sure that your status as a student is unshakable!" ”

"It's funny to say, I was an orphan before, and when I wake up, we will become brother and sister!"

"It's brother and sister!" Lin Chaoxi emphasized.

Glancing at Qiao Shan, Xiao Lin got out of bed and sniffed his nose: "It's so fragrant, what did you do?" ”

"Fish-flavored shredded pork, braised pork ribs!" Johnson Road.

Lin Chaoxi stretched out his hand: "Xiao Linzi!" What about the rice in Hongu? ”

"Gotcha! I'll bring it to you, mother! ”

Qiao Shan turned around with a smile and went to the kitchen to serve rice, and shook his head helplessly, Lao Lin still changed himself to Lin Aimin, really......

……

……

Retracting his gaze, Qiao Shan looked at the old strawberry forest in front of him, and put down the bowl quickly.

"Lao Lin, will you go out to play after eating?"

"Okay!"

Lao Lin wiped his mouth excitedly, his eyes lit up: "Actually, I wanted to tell you this just now, but I'm embarrassed...... Hey hey ......"

"Then when Lin Chaoxi comes back, let's go out for a walk together!" Qiao Shan clapped his head.

Speaking of Lin Chaoxi, Lao Lin immediately gossiped: "Xiao Ji, this Lin Chaoxi, my daughter...... Are you two in love? ”

Qiao Shan shook his head and said with a smile: "No." ”

Lao Lin looked like I was an intellectual, and you couldn't fool me: "Don't lie to me, you and my daughter are hugging me in front of me, and you still say that you are not in love?" ”

"Huh...... That's right! You're a big star, right? ”

Suddenly thinking of something, Lao Lin didn't wait for Qiao Shan to answer, and continued to ask.

"You know what?"

"Hiss......" Lao Lin suddenly frowned, looked Qiao Shan up and down, and said solemnly: "I said, although I crossed over, but Lin Chaoxi is my nominal daughter after all, you kid shouldn't want to soak in others, and you don't want to admit it, right?!" ”

As he spoke, Lao Lin rolled up his sleeves.

Where is this?

Qiao Shan couldn't help but laugh and said: "I said Lao Lin, your brain can really relate!" Let's go! Since you want to know, then I'll tell you! ”

His expression became serious, he looked left and right, leaned in front of Lao Lin, and said in a low voice: "Don't you want to know, how do I know that you have crossed over?" ”

Lao Lin's spirit was cold: "You also crossed over?" ”

Qiao Shan shook his head and said, "Actually, Lin Chaoxi and I have just crossed back from the parallel world, and in that world, we have traveled to 2006......"

He briefly summarized the experience of crossing over, and finally said: "So as soon as you wake up, I know that you are someone who has crossed over from other parallel worlds, and you have traveled from 1993!" ”

"I see!"

Lao Lin looked shocked, and felt that this was the truth of the matter.

Wait a minute!

Lao Lin's eyes suddenly lit up, and he said, "You mean, you are in the cheese...... It's the cheese world, you said that you are in the cheese world, and I in 2006 proved the P/NP problem in stages?! ”

This is the problem that Lao Lin is most concerned about!

Qiao Shan nodded and said, "Yes! In the world of cheese, you in 2006 proved that [graph isomorphism is NP complete] and has become famous. ”

"But you don't have to be excited, the process of parallel worlds is not consistent, for example, in the current world, you are in your forties, but there is still no phased proof of results."

"Oh......"

Lao Lin touched his chin and fell into deep thought.

Two parallel worlds, one with academic achievements in 2006 and the other with nothing in 2018, are indeed different.

What about the world I'm in?

Lao Lin looked at Qiao Shan and said, "Assuming that the world I am in is the mousse cake world, that means that I may prove P/NP in less than the millennium, or I may not be able to prove P/NP in my lifetime, right?" ”

In fact, mousse cake and fruit cake are not the same way to classify......

Qiao Shan wanted to complain, but he still didn't say anything, just nodded: "Maybe." ”

Mousse World ......

……

The sound of a key being inserted into the lock hole is heard, and the door is opened.

Lin Chaoxi hugged the cardboard box, and as soon as he came in, he saw Qiao Shan and Lao Lin chatting happily, and his depressed mood was swept away.

"I'm back!"

Glancing at the coffee table, Lin Chaoxi said, "You've all finished eating?!" ”

"I'm done! Just wait for you to come back and hang out together! ”

The memory stayed at the twenty-year-old Lao Lin, who stood up heartlessly and said happily.

"I've got a meal for you."

Qiao Shan got up and went to the kitchen to take out the reserved meal, and gave Lin Chaoxi a look, motioning for her to come over and talk......