Before today, Ning Xiao had seen a girl cry. Ning Xiao and Ning Yulin both cried in front of him.

But it's really the first time he's seen it, obviously his eyes are already foggy, and the tears are already swirling in his eyes, and he can still take back the tears.

Well, it's worthy of being a strong sister.

Ning Xiao praised Lu Xiaoya in her heart, and was about to help her pick up the graphics card that fell to the ground, but the girl had already bent down to pick up the graphics card first.

"Let's go, by the way, I wish you a prize." Lu Xiaoya waved her hand magnanimously and said.

"Meow ......" didn't wait for Ning Xiao to reply to the previous sentence, the two separated, and the kitten on one side barked weakly.

"Hey, what a cute kitten......"

Lu Xiaoya looked at the voice in surprise, saw March, squatted down again, first stretched out her hand and tentatively touched the kitten's head, and found that March squinted her eyes, quite enjoyable, and after not being aggressive, she simply threw the graphics card to the ground and hugged the kitten into her arms: "Kitten, are you lost with your master?" Shall I take you to the master? Why don't you just come with me......"

Ning Xiao looked at March in Lu Xiaoya's arms, the cat was putting its head against the girl's chest, which also made Ning Xiao immediately look away, and explained helplessly: "This is my cat." ”

"Huh? People like you still have cats? ”

Ning Xiao narrowed his eyes and asked, "What kind of person am I?" ”

"Well, forget it...... You have to be obedient to that kitten, I'll go first. ”

"Meow ......" kitten jumped out of the girl's arms, and the little paws just grabbed the outer box of the graphics card, and the little claws that didn't look sharp just tore a slit in the box.

"Ah......" Lu Xiaoya was a little bored, but she just snorted softly, and then picked up the graphics card that she wanted to smash directly. If it weren't for the fact that it took nearly 3,000 yuan to buy this thing, she would have stopped pulling with that unscrupulous merchant a long time ago.

Lu Xiaoya didn't blame March, after all, a cat would definitely not know what it was. It's just a little boring, and I can't say that the unscrupulous merchant has another reason not to exchange it for her.

But in Ning Xiao's eyes, the operation of March can no longer be said to be a hint, it is simply explicit......

"Is there a problem with this graphics card?" Ning Xiao asked.

Hearing this question, the girl's little emotions that had just been suppressed came up again.

Thinking of the words that she had just argued with the merchant, but was sneered at, the tears finally couldn't help but drip down with lightning speed.

All right......

This time, Ning Xiao bent down first, picked up the graphics card that had been caught, and asked, "What's the matter?" Broken graphics card? ”

Lu Xiaoya stood there silently, nodded first, and then shook her head.

Ning Xiao thought for a while and said, "So the graphics card is indeed broken, but aren't you angry because the graphics card is broken?" ”

Lu Xiaoya didn't say anything, just nodded slightly.

Ning Xiao finally broke the defense.

Really, if Lu Xiaoya just cried, it wouldn't matter. I can't afford to provoke, I can always afford to hide.

But what he is most afraid of is like Lu Xiaoya now, who is obviously very stubborn and wants to stop his tears, and without making a sound, his tears keep dripping. It's like Ning Xiao when he was a child, and he couldn't bear it after being wronged.

At that time, Ning Xiao thought that when he grew up in the future, whoever dared to provoke Ning Xiao must make the other party look good.

But when I got older, I realized that my fist couldn't solve any problems at all.

And now it seems that no one will take the initiative to provoke this cousin.

Then he met Lu Xiaoya, who suddenly collapsed emotionally.

Yes, this performance accidentally aroused Ning Xiao's desire to protect.

Ning Xiao looked at the outer packaging of the damaged graphics card, simply opened it directly, and then asked, "New one?" ”

"Hmmm......"

"Just bought it not long ago?"

"No, it's been more than a month."

"Give me the phone, and I'll see your chat history with the merchant."

"No!"

"Will you believe it or not, I can see the full record?"

"Huh? Are you still a hacker? Hearing this, Lu Xiaoya couldn't care about being sad, and looked at Ning Xiao in surprise, she had admired hackers when she was a child, but she had never seen a living hacker.

Ning Xiao didn't say anything, but just stretched out his hand towards Lu Xiaoya.

Well, it feels more and more like his cousin, because Ning Xiao is the same, even when she is the saddest, if something happens that she is particularly interested in, she will quickly divert her attention.

Probably because Ning Xiao really has the momentum of a superior now, Lu Xiaoya finally chose to honestly call up the chat history with the merchant, and then handed over the mobile phone.

casually flipped through it, and Ning Xiao probably understood the reason why Lu Xiaoya's mood was not quite right.

"Dear, you've been buying it for more than a month, maybe it's improper use, accusing us of not being genuine, that's too much."

"Dear, do you believe this? Who would buy a graphics card for a month for ordinary consumers? You shouldn't have come to hack us on purpose, right? And you flip through the chat history to see what you said before placing the order, you bought it and gave it to your classmates! Please, can you be reliable in making up nonsense? Do you buy a computer and send it to your classmates and bring it back to us for a month? ”

"Dear, that's what's wrong with you. Others say that a mining card is a mining card? I told you before placing an order, we are a regular tooling graphics card, and you have been testing and returning it for more than a month, so we can also suspect that you have a middle contract? Who says it is good now? ”

"Dear, if you're just short of money, why don't you just say it? Why don't I send you a red envelope of 100, and you don't mess around? ”

After reading it, Ning Xiao casually took a screenshot of Lu Xiaoya's chat record with the merchant, and then called up WeChat and sent it to himself.

……

Well, the seller's customer service had a weird tone, and Ning Xiao was a little angry when he saw it. But he subconsciously asked: "Which classmate are you going to give this computer to?" ”

"Huh?"

Lu Xiaoya looked up at Ning Xiao, bit her lip, and suddenly found that she was really not very good at lying, so she simply said, "I was going to give it to you, but don't think too much about it." I thank you for helping me order the M10 Pro before, and I had to increase the price by 10,000 yuan to buy this phone at that time. I just don't want to take advantage of you. It's just that now I've changed my mind and don't want to send you away. ”

This answer was something Ning Xiao didn't expect, after all, he really didn't know that he wanted to buy M10 Pro at that time, and he had to increase the price.

But when I heard that the computer that the girl had saved for a year was supposed to be given to him, I suddenly felt good. After all, except for his cousin, he really hasn't received any gifts from the opposite sex in his life.

So Ning Xiao asked, "Why?" ”

Lu Xiaoya looked at Ning Xiao suspiciously, and asked, "What, why?" ”

Ning Xiao pointed to the graphics card and said, "Change your mind, the computer doesn't want to send me anymore." Just because this graphics card is bad? ”

Lu Xiaoya subconsciously replied: "Of course not." Because it is said on the Internet that you are the richest man in the world, how can you still lack a computer? ”

Ning Xiao was silent for about five seconds, then looked at Lu Xiaoya seriously and said, "There is just one missing." You don't have to send the graphics card back, I'll accompany you to the dormitory to move the computer first. ”

"I ......" Lu Xiaoya subconsciously raised her hand and scratched her head, and asked, "Are you serious?" ”

"Unless you say it was going to be given to me fake! Also, don't always believe what is said online. It is also said on the Internet that Ma Zhengyun has 150 billion to 1.4 billion Chinese people, and he still has 148.6 billion left, do you believe it? ”

"Huh? Okay, but I don't want to cheapen the guy who sells graphics cards, and they might even cheat someone else! ”

"Don't worry, I promise they won't be able to cheat others."

"Are you using hacking? Can you show me what you do? ”

Ning Xiao glanced at the girl and said, "The crime of destroying computer systems is written in the Criminal Law. ”

Lu Xiaoya pouted and said, "Don't worry, I won't betray you." ”

Ning Xiao shook his head and said, "I will use legal means to make them realize their mistakes." ”

"Oh...... Let's go. Lu Xiaoya nodded, glanced at the graphics card that Ning Xiao was holding in his hand, squatted down and hugged March.

"Hmm!" Ning Xiao nodded, and then walked beside Lu Xiaoya.

"What's the cat's name?"

"March."

"Oh, it's March."

……

When they took the step, both of them fell silent.

Ning Xiao didn't have much experience dealing with the opposite sex, and of course Lu Xiaoya didn't either.

If it's just on her mobile phone, Lu Xiaoya can still post the emojis she has saved for many years, but when she walks around the campus like this, she doesn't know what to say. I just secretly complained in my heart about how I really cried in front of this guy just now...... It's a shameful look.

Until he came to the fork in the road, Ning Xiao couldn't help but ask: "I remember that your bedroom should go that way." ”

Lu Xiaoya replied: "I didn't live in a dormitory, I moved outside the school. ”

"Oh? Can't get along with your roommate? Ning Xiao asked subconsciously.

"Pretty much." Lu Xiaoya nodded.

Ning Xiao nodded.

In fact, when he was in Huaqing, he didn't get along well with his roommate. It's just that at that time, he didn't have the conditions to be willful enough to rent a house. Looking back now, if he could have rented a house near Huaqing at that time, he probably wouldn't have encountered so many messy things.

There's not much to say.

The two walked silently on the sidewalk.

Fortunately, it was already time for class, and there were not many people on the road.

It's just that neither of them noticed that a group of school leaders in the distance was coming from the other side of the avenue, preparing to go back to the administration building.

Originally, a celebration banquet was prepared, but neither of the two main owners appeared, which hurt everyone's enthusiasm somewhat, and the ordered lunch was still to eat casually, and it happened to be met when I came back.

"Ahem, Principal Chen, that seems to be Ning Xiao, right?" One of the vice-principals gestured to two men not far away.

Chen Yonggang, who was talking to another vice principal next to him, looked up and saw two young figures walking side by side in the shade of a tree, and then both of them were recognized by him, and suddenly said: "No wonder I don't want to eat with us old guys, it turns out that I am in a hurry to come back for a date." ”

"I made a mistake at work, and I knew that I should have notified my classmates of the road. Do you want to bring them over to dinner? The director next to him, who was in charge of the celebration, immediately admitted his mistake.

"Haha, Lao Liu, that's all you say. Well, let's leave the young people alone. It's really with us old guys, and the young people can't let go. Gone, gone. Chen Yonggang said very interestingly.

……

Ning Xiao soon realized that something was wrong.

Because he followed Lu Xiaoya, this road was exactly the path he was going to take.

"You're not going to rent in a faculty community, are you?"

"yes. It's okay. Don't look at the people standing guard there now, but the uncle guarding the door is very good, tell him and he will take you in. ”

To be honest, Ning Xiao was a little unsure if the doorkeeper uncle in Lu Xiaoya's mouth was his father. After all, Lao Ning is not the only middle-aged uncle guarding the door.

However, according to the news that Ning's father replied on WeChat just now, at least his father must be on duty during the day today. In Ning's father's words, the porter can't do this job for a few days, and it's good to be able to help share more now.

Well, after getting this answer, Ning Xiao nodded and agreed.

When I walked to the school gate, there were more students visible to the naked eye.

There is no way, there is a street next to the teaching staff community, which is the most lively place near the school, and there are many businesses. This is the closest school gate to that street. If it weren't for the fact that teachers often enter and exit this door, there might be more students.

A big celebrity like Ning Xiao will naturally be recognized often.

Fortunately, neither of them actually cares too much.

Ning Xiao has a clear conscience, and Lu Xiaoya has long been used to it. After all, she has already completed the whole process from falling in love to being dumped in other people's mouths. Anyway, she had already completely dismissed the idea of talking about a boyfriend at school, so whatever.

Anyway, no one can control the mouth of the public.

And Lu Xiaoya felt that she was walking right and sitting up straight. Even if the two walk together, there is at least a safe distance of more than half a meter apart, as long as they are not blind, they should be able to see the sense of estrangement.

In this way, Lu Xiaoya, who was so arrogant, quickly brought Ning Xiao to the gate of the faculty and staff community of the Sports University, and Ning Xiao could see from the glass of the gatehouse that Lao Ning was looking outside.

Ning Xiao knew that Lao Ning was waiting for him, because he mentioned a sentence in WeChat and came over immediately.

Just when the father and son looked at each other, Lu Xiaoya had already trotted two steps, walked to the unclosed window of the porter, and said sweetly: "Uncle, you still remember me, I will live inside." Today I invited a classmate, who, he came to help me move the computer, do I need to register first? ”

Lao Ning glanced up at Ning Xiao, then carefully looked at Lu Xiaoya's delicate little face, his face was full of joy, and said: "Forget it, you just register, name, ID number and phone number, as well as the specific room number of the residence, and the most important thing is to write clearly that it is the computer that you want to move out." ”

"Okay, thank you, uncle." Lu Xiaoya responded, then turned around and handed the cat in her arms to Ning Xiao behind her, and then began to take the initiative to register in the registration book handed by Lao Ning.

This is really not Lao Ning's embarrassment.

The requirements of this position are like this, if you want to move large things through the gate, you must register first. Lao Ning, at best, can only be regarded as iron-faced and selfless.

Ning Xiao looked at it, and was so happy that he couldn't find the old Ning who kept making eyes at him, and he didn't say anything. just refused to make contact with Lao Ning's gaze, and his gaze fell elsewhere. In order to avoid Lu Xiaoya's embarrassment, he didn't greet Lao Ning directly.

Soon the girl completed the registration, Lao Ning waved her hand and said: "Go in, go in, don't worry, you can move within today after registering, although you move slowly, it's okay." ”

"Oh, thank you, uncle." Lu Xiaoya couldn't figure out why a computer should be moved for a day, and she didn't quite understand why this uncle was so enthusiastic today, but she still thanked her, and then turned around naturally, took March from Ning Xiao beside her, and held it in her arms.

Ning Xiao glanced at Lao Ning, and then followed Lu Xiaoya into the community.

It wasn't until he turned the first intersection that Ning Xiao suddenly said, "The uncle who registered you just now is my father." ”

"Well, that's good...... Yes? What do you say? ”

"You heard that right."

Lu Xiaoya was stunned, standing in place, and didn't react for a long time.

This is a bit excessive, she didn't expect that Ning Xiao's father would be a security guard at the gate in the school staff community.

At this time, reminiscing about what the uncle said just now, Lu Xiaoya's face instantly turned red......

"No, why is your dad here?"

"My family used to be in Luohe County, and they were quite poor. And for my dad, my hometown is also a sad place, so one of the requirements for me to come to the Department of Mathematics at HKSU is to bring him and my cousin to Beijing. My cousin was placed in the library of the Mathematics Research Center of Yanbei University, and my dad chose here. But it won't be long before it will be transferred, probably next week. Ning Xiao explained casually.

Lu Xiaoya knew some things about Ning Xiao's past.

After all, the history of Ning Xiao's withdrawal from Huaqing has long since been unknown how many times he has swiped the screen on the Internet.

Until now, on the Weibo posted by the official Weibo of Huaqing University, some netizens rushed in and ridiculed in the comment area, "I heard that Huaqing gave up a Turing Award winner, a Fields Medal winner, and an invisible world's richest man, are you serious?" ”

But after all, not much is known.

It was at this time that I heard something more insider, it turned out that going to college can still drag the family?

"You're amazing." Lu Xiaoya praised from the bottom of her heart, and then couldn't help asking, "Ning Xiao, you shouldn't have deliberately dropped out of Huaqing at that time, right?" ”

Ning Xiao didn't answer, just glanced at the cat in the girl's arms.

The kitten squinted its eyes with a look of enjoyment.

"Didn't want to answer that." Ning Xiao shook his head.

"Oh, it seems that what is said on the Internet is true. The next time you meet that kind of self-inflicted woman, you can ask me for help. I'll tell you that I'm very good at dealing with this kind of woman. When I was in high school, there was a very bad classmate in my class who would say bad things about me everywhere, and when I saw me, he hid and walked away. Lu Xiaoya said very proudly.

"You hit her?" Ning Xiao asked casually.

Lu Xiaoya shook her head and said, "No, I beat her several boyfriends." If she talks about one, I'll beat one. ”

The corners of Ning Xiao's mouth twitched subconsciously, and he looked up and down at the small body of the girl next to him, with a suspicious expression.

Although he believes that there are also women with strong combat effectiveness, such as him Zhai Qiuxian, the strength of that woman can really be seen with his eyes. As for Lu Xiaoya......

"Hey, what kind of expression do you have, I told you that I've been practicing free fighting since I was a child. And my dad also taught me a lot of anti-joint and elbow skills that are banned because of too much lethality, and you don't want to look down on people. ”

Ning Xiao was silent.

"Huh...... You hold Little March, I'll show you. Lu Xiaoya handed over the kitten in her arms.

Ning Xiao was stunned, and subconsciously picked up March.

Without the kitten in her hand, the girl suddenly had a solemn face, looked around, and then looked in a direction, trotted two steps, and then jumped up, easily did a somersault, jumped into the green area next to the road in the community, and without waiting for Ning Xiao to react, after landing on the ground, a whip leg kicked directly to a small tree that was about two circles thicker than a baseball bat......

The leg was obviously not very strong, so that the poor little tree's trunk was obviously tilted to the other side, and then the leg was retracted, and when the little tree bounced back, a wrong step followed by a direct elbow.

Ning Xiao heard the slight "rustle" of the leaves shaking and there was a "kacha" sound, although the small tree was not broken, but a crack could be seen in the middle......

Before Ning Xiao could sigh, a shouting suddenly came from the other side of the community: "Hey, hey, what are you doing?" Little girl, did this tree provoke you? Whose child are you? Hold it! ”

The girl, who was still too good just now, was stunned, then quickly jumped out of the green belt, and then stood honestly on the side of the road.

The next moment, a middle-aged woman walked on the side path.

"You...... Uh, Ning Xiao? ”

"Well, I'm sorry, teacher, my friend was a little excited just now. I'm sorry, but I'll find someone to inspect the tree later, and if there's a problem, I'll replant it. I promise she won't next time. Ning Xiao owed slightly, and then apologized.

The attitude is very sincere, and of course it does have something to do with him.

If it weren't for the fact that his expression of disbelief was too obvious, Lu Xiaoya probably wouldn't have thought of proving himself in this way.

"Oh, it's okay, it's okay."

The middle-aged woman smiled and said something to Ning Xiao, then looked at Lu Xiaoya and said, "It's a little girl, it's a trivial matter to lose your temper and kick the tree, but you must not kick people like this?" You've been practicing since you were a child, haven't you? Is it a major in competitive sports training or martial arts? ”

"Martial arts professional." Lu Xiaoya replied in a low voice.

"No wonder. Okay, then you guys are busy first, young people have nothing to do and don't quarrel anymore. The middle-aged woman explained to the two again, and then turned around and left.

Lu Xiaoya stuck out her tongue at this time, shrunk her neck, made a bitter face, and returned to Ning Xiao's side.

"I'll admit you're amazing, let's go." Ning Xiao said very seriously.

"It's not as good as you, it's good to have you, otherwise I'd be miserable." Lu Xiaoya said with a sigh of relief.

She knew the combat effectiveness of those middle-aged women in the community.

After all, this is a faculty community of the University, and most of the people living there are teachers and staff of the University. She could be stuck there for an hour to talk about reasoning, and she had to call the counselor by the way......

"It's okay, if you get into trouble at school in the future, report my name." Ning Xiao said.

"Huh?"

"I probably won't have much chance to cause some small disasters that students will encounter in the future, so you can help me experience another kind of student life." Ning Xiao explained.

This time Xiaoya changed her way, and was stunned by Ning Xiao's obviously abnormal thinking pattern.

"Then you mean what you say."

"I always speak my word."

"Pull ...... Forget it, it's too naïve! ”

"Let's pull the hook!"

……

Ning Xiao found that if he ignored Lu Xiaoya's figure and appearance, he could safely treat the little girl as a man.

For example, when he came to the one-bedroom apartment rented by Lu Xiaoya, he watched Xiaoya's classmates pack the monitor and chassis directly with their hands and feet. People who rarely send couriers must not have such a quick approach.

Originally, Lu Xiaoya also planned to carry the monitor and chassis alone and send it directly to Ning Xiao.

But Ning Xiao was still embarrassed to let a girl take on all the heavy work after all.

So Ning Xiao carried the monitor, Lu Xiaoya carried the chassis in one hand, and the kitten in the other.

The relaxed appearance made Ning Xiao suddenly interested in biology and sports science, mainly to study why a body that does not look stout can contain great strength.

……

moved the computer to Ning Xiao's room in the administration building, and Lu Xiaoya said that she still had classes in the afternoon, so she quickly turned away.

Ning Xiao left March in the room and walked out of the door again.

Although I met with my dad just now, I didn't communicate after all.

Came to the door of the faculty community again, and this time Lao Ning had already walked out of the gatehouse. Still not so elaborate, father and son began to walk along the street, and then simply sat on the curb.

No way, get used to it. Ning Xiao still remembers that when he was a child, when his father took him to walk around the county, he was tired and just found a place to sit casually, kindly.

"I heard that you went out this time, not only won the award, but also did something big?"

"It's not a big deal. It's to get back something that belongs to me. ”

"Tut-tut, it's out of breath, and now the tone of speech is different. Leader Luo said that you are now the richest man in the world. ”

"That money has other uses, it will be spent like running water. In a few days, the news will help me explain, the money will be invested in more important things, but any remaining little is indeed enough for our family to spend a few lifetimes. ”

"What then? I'm not ready yet...... Do I have to watch TV and learn how those rich people live, so as not to embarrass you when I go out in the future? ”

"Oh, then you learn to take time out and teach me, and I don't know how to live the life of a rich man."

Ning Xiao replied casually, then took out an ICBC bank card from his pocket, handed it over, and said: "This is the bonus I got this time, as well as some previous rewards, which have been exchanged for RMB for me, and there are more than 10 million in it, you can take it and learn it first." ”

Lao Ning took the bank card handed by Ning Xiao and sighed with emotion: "More than 10 million, I probably can't make so much money in Luohe for a lifetime, right?" ”

"You don't work so hard for me to study, and we can't make so much money by connecting the water pipes together for a lifetime."

"What's going on with that little girl today?"

"A friend."

"Is it a girlfriend or a friend?"

"I don't know."

"What do you mean I don't know?"

"For the time being, they are still friends, and I don't know if they will develop into girlfriends in the future."

"I think it's pretty good, I've been in and out for the past six months, I'm very polite, my tutor is good, and I'm very rare. And I've never been back with anyone who doesn't care about it. I remember never going out at night. ”

"Aren't all college students like that?"

"Who's to say? There are also several students from your school who are rented in the community, and they often come back by taxi in the middle of the night on weekends and get drunk. You can smell the wine from afar. You're looking for one like that, I don't like it. ”

"Don't you like to drink?"

"I still like to eat pork, will you find a pig to live on in the future?"

"Don't talk about that."

"Why don't you talk? Baby, you are sometimes cold, your sister and I are worried that you will not find a partner in your life, if it's okay, let's make sure as soon as possible. I know that you young people think differently now than we used to. Neologisms come in sets, what single aristocrats, what dink families. However, people, you can't be too selfish in your life, and how many descendants you leave are a big thing related to the reproduction of the entire human race. Well, that's what it used to say in the animal world. ”

Ning Xiao: "......"

"Well, I know you don't like to hear it. When you're done lately, go to Uncle's for a meal. Make sure to talk to me at a good time, and I'll let your uncle prepare. ”

"Good. By the way, Sister Xiao is in love and is a professor of mathematics at Yanbei University. ”

"That's a good feeling, does your uncle know?"

"How do I know?"

"You should know that professor, right? What are the people? ”

"Okay."

"Then I have to tell your uncle about the good news, just wait for Ning Xiao to bring people back next time, so that we can meet too."

"You've seen it. On the first day he came to the capital to eat the wind reception, he sat diagonally opposite you and called Fang Xu. ”

"Huh?" Lao Ning frowned and pondered, then shook his head: "I don't remember much." ”

"Well, you'll remember when the time comes."

"Gotta get busy."

"Good!"

……

Rio de Janeiro, Brazil.

The noise outside the door woke up Fang Xu, who had just fallen asleep, and he picked up his mobile phone and looked at the time, it was already half past eleven in the evening.

Regarding the fact that the hotel room is not soundproofed, Fang Xu only feels powerless.

However, I heard that the more advanced rooms are soundproofed.

I was about to go to the toilet to continue resting, and suddenly saw a prompt on my mobile phone that I had received an unread email, and the key was that the other party's email was very familiar.

Ning Xiao's mailbox?

Fang Xu immediately sobered up.

Subconsciously clicked on the mailbox, and then was stunned.

Seeing the sentence "I will agree with you and my cousin when I do this topic", Fang Xu's mind was confused.

How so?

I probably have a feeling of returning to before the college entrance examination.

At that time, the teacher's statement was actually about the same, how many points you worked hard to get, you could go to Huaqing and Yanbei.

Unexpectedly, he had already become a professor at Yanbei University, and he would have to meet this kind of assessment. I always feel a sense of ridiculousness.

So Fang Xu subconsciously downloaded the question given by Ning Xiao to his mobile phone.

clicked on it and glanced at it, his brain was even more confused, and what Ning Xiao gave was a number thesis question.

"If a is an infinite subset of positive integers, and the reciprocal and diverging of all numbers in a, then a contains a series of equal differences of any length."

Well, the description is very simple, and the explanation is not difficult, because the reciprocal sum of all natural numbers is divergent.

But the moment Fang Xu saw this question, the whole person was stunned.

He didn't even know if Ning Xiao looked up to him too much, or if he planned to break up him and Ning Xiao.

Because the correct description of this problem is called Erdsch's reciprocal and conjecture, the most famous problem in number theory is still a Fields Medal-level problem. It belongs to the same kind as the Navis Tox equation, as long as it is proved and recognized by the academic community, it will immediately win the Fields Medal.

One thing to say, this is much more difficult than the college entrance examination questions. It belongs to the kind of mastery of advanced mathematics and can start thinking and argumenting, the threshold seems to be not high, but it has not been proved for so many years.

The only advance at the moment is to prove that prime and reciprocal numbers are divergent and contain a series of equal differences of arbitrary length. However, this kind of proof method of the predecessors is very special and cannot be generalized to ordinary cases at all, so it is still a number theory problem with a low lower limit of research but too high a higher upper limit of difficulty.

Really, Fang Xu felt for a moment that Ning Xiao was joking with him.

Because if you devote your main energy to the study of this kind of hierarchical problem, the greatest possibility is probably that after many years of research, you will waste your youth and have nothing.

Yes, a question made Fang Xu sober, and there was no trace of sleepiness.

After sitting on the bed for a while, the sound of conversation came from the hallway again.

Fang Xu could hear Fan Zhenhua's voice among them, and he was politely sending people away.

It can be seen that today's gathering of the elders has been chatting for a long time, from six o'clock in the afternoon to now, half past eleven, it has been five and a half hours.

Finally, the sound outside quieted down, and Fang Xu was about to go out to take a look, but heard a soft knock on the door.

"Xiao Fang, have you slept?"

"Not yet, it's coming."

Fang Xu, who was at the door of the room, opened the door, and then saw Fan Zhenhua standing at the door with a serious face: "Xiao Fang, you clean up today, let's go back tomorrow, this meeting can't go on." ”

"Okay, Academician Fan." Fang Xu agreed, not feeling strange.

He could probably imagine what was going on.

Few people knew about Fang Xu and Ning Xiao's falling in love, even a small person like him could be specially found and corrupted, you can imagine how big the two elders would be. Not to mention standing in their shoes, many times it's not even a matter of money.

Some of the emotions are really a headache.

"Okay, that's it."

"Forehead ......"

"What, what's the matter?" Seeing Fang Xu's appearance of wanting to speak and stopping, Fan Zhenhua asked.

"Ning Xiao sent me an email just now, probably arranging a research topic for me."

"Research topic? What topics. ”

"Erdish countdown and conjecture."

"Ahem......" Fan Zhenhua coughed violently.

But looking at Fang Xu's gaze, there was obviously a lot of emotion: "It's a good thing." You remember, when you go to the Sports University next year, you will work hard, and don't fall behind in your teaching tasks. However, this project is still in our Yanbei International Mathematical Research Center. ”

"No, Fan Lao ......"

"Don't worry, Ning Xiao has specially arranged this topic for you, and there is a high probability that you can solve it. Think about Ning's cutting method, get it? Do it well, maybe in four years there will be a second Fields Medal winner in China. Fan Zhenhua raised his hand and patted Fang Xu's shoulder and said.

Fang Xu was stunned, he felt that Fan Zhenhua was overly optimistic in this matter.

……

Yanbei Sports University, administrative building.

Ning Xiao had already returned to the room.

The computer sent by Lu Xiaoya was put aside, and Ning Xiao was looking at the keywords in the theoretical content of Lu Xiaoya and the merchant on the Internet.

For example, mining cards, tooling graphics cards, and so on......

Soon I understood the cause and effect.

To put it simply, a virtual currency called Bitcoin is very valuable, as for why it is very valuable, because it has extremely scarce attributes, the total number is fixed, and there is a kind of technology called blockchain.

The reason why the so-called blockchain technology is powerful is that each block stores a certain amount of information, as long as there is a server working in the system, then the entire blockchain is secure, and these servers are called nodes; The other is to modify the information in the blockchain, which must obtain the consent of more than half of the nodes and modify the information in all nodes, so it looks very safe.

In more technical terms, data is difficult to tamper with and decentralized.

At the same time, if you want to own this kind of bitcoin, you need to use a mining machine to mine.

The process of consuming a large amount of power resources and using a powerful GPU mining card for calculations is called mining. Those cards that are used for mining are called mining cards, the so-called tooling graphics cards, in fact, the essence is likely to be the graphics cards that the manufacturer directly ships to the miner, because the other party does not care much about the packaging, so simply omit the packaging to save costs......

Of course, if the new workwear graphics card is similar to the graphics card sold to players, then the used mining card can look new, but in fact, in order to maximize the revenue, the miner often overclocks and uses GPU to calculate, which is basically a dark injury.

The mining disaster refers to the recent decline of various virtual currencies driven by the collapse of Bitcoin, which has caused a wave of painful declines, and many miners have not been able to dig out virtual currencies that can not even be exchanged for electricity bills, so they can bear the pain of selling the most valuable graphics cards at a low price, so that a bunch of mining cards are flooded in the market.

After roughly understanding the cause and effect, Ning Xiao was a little emotionally emotional about the power of the Internet information cocoon.

Bitcoin has been popular many times, and he doesn't even know much about it.

But at the same time, he really didn't think too much about the cognitive logic of the various virtual currencies that rely on Bitcoin and are considered by many people to exist.

Consuming so many resources, doing something that doesn't make any sense at all, and then giving it so-called cognitive value, even if many virtual currencies have been proven to be deceptive, and even trapped countless people, there are still people who are happy to rush in.

Even Huaxia officials announced that this thing was not recognized, but it still couldn't stop those who believed.

Ning Xiao thought this matter was very interesting.

How to put it, the whole logic of the so-called virtual currency is built on the basis of everyone agreeing that blockchain technology is extremely secure, and no one can tamper with Bitcoin wallets. So the money is extremely safe.

In other words, if he can prove that the money is not safe at all, and that there is a way to cheat more than half of the nodes in the chain at any time through the corresponding key, it also means that he can manipulate everyone's wallet at will. The value of this thing is gone.

This happens to be Kitten's strength, especially since this thing relies on the Internet, according to the current coverage of Cisco, Samsung, Lokia and other telecom network products in those developed markets, he even has a way to make all blockchains crash once a day......

After thinking about it, Ning Xiao decided to salute first and then soldier.

He found the merchant on the platform through the screenshot of the conversation between Xiaoya and the other party on WeChat, and then sent the screenshot to the customer service?

?? In the past, he typed and sent a paragraph very seriously: "Please follow the false one penalty in the advertising on the homepage of your product, and refund ten new unopened genuine graphics cards of the same type to the account in the picture above, otherwise you will be responsible for all the consequences caused!" ”

Soon, the customer service replied, first with a question mark.

Then he asked very humbly: "Dear, do you have any serious brain disease?" ”

Well, seeing this news, Ning Xiao knew that March had won again.

After all, it's a big buzz again!