The end of technology.

Chapter 123 March Wins Again

Before today, Ning Zi had seen girls cry.Both Ning Xiao and Ning Yulin cried in front of him.

But it was really the first time he saw her, and it was obvious that the eyes were foggy, and the tears were already rolling in the eye sockets, and they could still be taken back.

Well, as expected of a strong sister.

Ning Zi praised Lu Xiaoya from the bottom of her heart, and was about to help her pick up the graphics card that fell on the ground, but the girl had already bent down to pick up the graphics card.

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

"Meow..." Before Ning Zi could reply, the two parted, and the kitten on one side uttered weakly first.

"Hey, what a cute kitten..."

Lu Xiaoya glanced at the voice in surprise, saw Sanyue, squatted down again, first stretched out her hand and touched the kitten's head tentatively, and found that Sanyue squinted her eyes and seemed to be enjoying herself, not aggressive. , simply threw the graphics card on the ground again, and hugged the kitten into his arms: "Little kitten, did you get lost with the owner? May I take you to find the owner? Or just leave with me." ..."

Ning Zi looked at Sanyue in Lu Xiaoya's arms. The cat was pressing its head on the girl's chest in a mean way, which made Ning Zi look away immediately, and explained helplessly: "This is my cat. .”

"Huh? People like you still keep cats?"

Ning Zi narrowed her eyes and asked, "What kind of person am I?"

"Uh, forget it...you have to be good, little cat, I'm leaving first."

"Meow..." The kitten jumped out of the girl's arms, and its little paws just caught the outer box of the graphics card, and the little claws, which didn't look sharp, just tore a crack in the packaging box.

"Ah..." Lu Xiaoya was a little bored, but she just let out a soft sigh, and then picked up the graphics card she wished she had smashed.If it wasn't for the nearly 3000 yuan it cost to buy this crap, she would have stopped messing with that unscrupulous merchant a long time ago.

Lu Xiaoya didn't blame March, after all, a cat wouldn't know what it was.It's just a little annoying, maybe the unscrupulous merchant has another reason not to exchange the goods for her.

But in the eyes of Ning Zi, this operation in March can no longer be said to be a hint, it is simply an explicit statement...

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

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

Thinking of her argument with the merchant just now, but being ridiculed for those words, the tears finally couldn't hold back and dripped down with lightning speed.

Ok……

This time Ning Zi bent down first, picked up the broken graphics card, and asked, "What's going on? The graphics card is broken?"

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

Ning Zi 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 but nodded slightly.

Ning Zi finally broke the defense.

Really, it would be fine if Lu Xiaoya just cried.Can't afford to provoke, always hide.

But what he is most afraid of is the way Lu Xiaoya is now, who is obviously very stubborn and wants to stop her tears, without making a sound, the tears keep dripping down.It is very similar to Ning Xiao's appearance after being wronged and unable to bear it when he was a child.

At that time, Ning Zi was thinking that when he grows up, whoever dares to provoke Ning Xiao, he must make him look good.

But after growing up, I realized that fists can't solve any problems at all.

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

Then he ran into Lu Xiaoya who had a sudden emotional breakdown.

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

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

"Um……"

"Just bought it not long ago?"

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

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

"No!"

"Believe it or not, if you show it to me, I can also check the complete record?"

"Ah? Are you still a hacker?" After hearing this, Lu Xiaoya couldn't care less about being sad, and looked at Ning Zi in surprise. She worshiped hackers when she was a child, but she had never seen a live hacker.

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

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

Probably because Ning Zi really has the aura of a superior person now, Lu Xiaoya finally chose to call up the chat records with the merchant honestly, and then handed over the phone.

After flipping through it casually, Ning Zi probably understood the reason why Lu Xiaoya's mood was not quite right.

"My dear, you have bought it for more than a month, and the problem may be due to improper use. It would be too much to accuse us of not being genuine."

"Darling, do you believe this? Who would buy a graphics card for a month as an ordinary consumer? You don't mean your peers deliberately hacked us, right? And you look through the chat history to see what you said before placing the order. Sending it to a classmate! Please, can you be more reliable in making up nonsense? You bought a computer to give to a classmate and brought it back for a month to find us?"

"My dear, this is your fault. Others said that the mining card is a mining card? I told you before placing the order that we are a regular tooling graphics card. Besides, you have been testing and returning the product for more than a month. We You can also suspect that you have been transferred in the middle? Who can say it right now?"

"Honey, if you are short of money, why don't you just tell me? How about I send you a hundred red envelopes, so you don't mess around?"

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

……

Well, Ning Zi was a little annoyed at the seller's customer service's eccentric tone.But subconsciously asked: "Which classmate are you buying this computer for?"

"what?"

Lu Xiaoya looked up at Ning Zi, bit her lips, and suddenly found that she was not very good at lying, so she simply said: "I planned to send it to you, but don't think too much about it. I thank you for ordering it for me earlier." My M10 pro, at that time, I had to pay an extra 1 yuan to buy this phone. I just didn’t want to take advantage of you. But now I have changed my mind and don’t want to give it to you.”

This answer was unexpected by Ning Zi, after all, he really didn't know that he wanted to buy the M10 Pro at that time and there was an additional price increase.

But when he heard that the computer that the girl had saved for a year was supposed to be given to him, he suddenly became in a good mood.After all, apart from his cousin, he had never received a gift from the opposite sex in his life.

So Ning Zi asked, "Why?"

Lu Xiaoya looked at Ning Zi suspiciously and asked, "Why?"

Ning Zi pointed to the graphics card and said, "Changed my mind, the computer doesn't want to give me away. Just because the graphics card is broken?"

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

Ning Zi was silent for about five seconds, then looked at Lu Xiaoya seriously and said, "It happens to be missing one. You don't need to send the graphics card back, I will 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 that it was a lie that you planned to give it to me! Also, don't always believe what is said on the Internet. It is also said on the Internet that Ma Zhengyun has 1500 billion points to give 14 million to 1486 billion Chinese people, and he still has [-] billion left. Do you believe it too?" ?"

"Eh? That's fine, but I don't want to undercut the graphics card seller, and they might cheat other people!"

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

"Are you using hacking techniques? Can I see what you're doing?"

Ning Zi glanced at the girl and said, "The crime of sabotaging the computer system is written in the criminal law."

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

Ning Zi shook her head and said, "I will use legal means to make them realize their mistakes."

"Oh...then let's go." Lu Xiaoya nodded, glanced at the video card Ning Zi was holding in her hand, squatted down and hugged Sanyue up.

"En!" Ning Zi nodded, and then walked beside Lu Xiaoya.

"What's the cat's name?"

"March."

"Oh, it's Little March."

……

When they stepped forward, both of them fell silent.

Ning Zi doesn't have much experience in dealing with the opposite sex, and of course Lu Xiaoya doesn't either.

If it was only on the mobile phone, Lu Xiaoya could still post the emoticons she had saved for many years, but when she was walking around the campus like this, she didn't know what to say.He just complained secretly in his heart why he really cried in front of this guy just now...it was very embarrassing.

When they reached a fork in a road, Ning Zi couldn't help but ask, "I remember which way you should go in your dormitory."

Lu Xiaoya replied: "I don't live in the dormitory, I moved out of school."

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

"Almost." Lu Xiaoya nodded.

Ning Zi nodded.

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

There is nothing to say.

The two walked silently on the sidewalk.

Fortunately, it was already class time, 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 were coming from the other side of the avenue, preparing to go back to the administration building.

Originally, a celebration banquet was prepared, but none of the two lords showed up, which somewhat hurt everyone's enthusiasm, so I went to eat something casually after the ordered lunch, and happened to meet when I came back.

"Ahem, Principal Chen, that seems to be Ning Zi?" A vice principal pointed to two people not far away.

Chen Yonggang, who was talking to another vice principal beside him, looked up and saw two young figures walking side by side under the shade of a tree. Afterwards, he recognized both of them, and suddenly said: "No wonder you don't want to talk to us old guys. We had dinner together, so we were rushing back for a date."

"I made a mistake at work. I should have notified classmate Lu earlier. Would you like to invite them to have dinner together?" The director who was in charge of the celebration next to him immediately admitted his mistake.

"Haha, old Liu, let's get over that. Well, let's not bother with young people. If we are really with old guys like us, young people can't let go. Let's go, let's go." Chen Yonggang is very tactful Said.

……

Ning Zi soon realized that something was wrong.

Because the road he walked with Lu Xiaoya happened to be the road he was going to take originally.

"You won't just rent it in the teaching and staff quarters, will you?"

"Yeah. It's okay. Don't look at someone standing guard there now, but the uncle who guards the gate is very nice. Just tell him and he can take you in."

To be honest, Ning Zi was not sure if the gatekeeper uncle Lu Xiaoya was talking about was his father.After all, Lao Ning is not the only middle-aged uncle guarding the gate.

But according to the news that Dad Ning replied on WeChat just now, at least his dad must be on duty during the day today.In Papa Ning's words, the concierge can't do this job for a few days, so it would be great if I could help share a little more now.

Well, after getting this answer, Ning Zi nodded and accepted it.

When they were about to reach the school gate, there were more students visible to the naked eye.

There is no way, the street next to the faculty and staff quarter is the busiest place near the school, with many businesses.Here is the nearest school gate to that street.If it weren't for the teachers who often came in and out of this door, there might be more students.

Naturally, big celebrities like Ning Zi are often recognized.

Fortunately, neither of them really cared much.

Ning Zi has a clear conscience, while Lu Xiaoya is already 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 dispelled the idea of ​​talking about boyfriends in school, so whatever.

Anyway, no one can control the public's leisurely mouth.

And Lu Xiaoya felt that she was walking upright and sitting upright.Even if the two walked together, there was at least a safe distance of more than half a meter between them. As long as they were not blind, they should be able to see the sense of estrangement.

In this way, the confident Lu Xiaoya quickly brought Ning Zi to the gate of the teaching and staff quarters of the Sports University. Ning Zi could see Lao Ning looking out from the glass of the gatehouse.

Ning Zi knew that Lao Ning was waiting for him, because he mentioned in WeChat that he would be here soon.

Just when the father and son looked at each other, Lu Xiaoya trotted for two steps, walked to the open window of the gatehouse, and said sweetly: "Uncle, you still remember me, I live inside. Today I I invited a classmate, here, he is here to help me move the computer, do I need to register first?"

Lao Ning raised his head and glanced at Ning Zi, then carefully looked at Lu Xiaoya's delicate face, his face was full of joy, and said: "Forget it, you just need to register, name, ID card, etc. phone number, as well as the specific room number of the residence, and the most important thing is to clearly state that the computer is to be moved.”

"Okay, thank you uncle." Lu Xiaoya responded, then turned around, and handed the cat in her arms to Ning Zi behind her, and then seriously began to start writing on the register book that Lao Ning handed over. Active registration.

This is really not Lao Ning making things difficult for others.

This is the requirement of this position. If you want to move large items through the gate, you must register first.At best, Lao Ning can only be regarded as stern and selfless.

Ning Zi glanced at Lao Ning, who was so happy that he couldn't find Bei that he kept winking at him, but didn't express anything.He just refused to make contact with Lao Ning's eyes, and his eyes fell elsewhere.In order to avoid embarrassment for Lu Xiaoya, he didn't greet Lao Ning directly.

Soon the girl completed the registration, and Lao Ning waved his hand and said, "Go in, go in, don't worry, you can move out within the day after registration, just move slowly, it's fine."

"Oh, thank you uncle." Lu Xiaoya couldn't figure out why a computer had to be moved for a day, and she didn't quite understand why the uncle was so enthusiastic today, but she still thanked her, then turned around naturally, from Ning Zi, who was beside her, took Sanyue in her hands and hugged her in her arms.
Ning Zi glanced at Lao Ning, then followed Lu Xiaoya into the community.

It wasn't until turning the first intersection that Ning Zi suddenly said, "The uncle who just registered for you is my dad."

"Well, it's pretty good... huh? What are you talking about?"

"You heard right just now."

Lu Xiaoya was stunned and stood there, unable to react for a while.

This is a bit too much, she didn't even think that Ning Zi's father would be a security guard at the gate of the school's teaching staff area.

At this moment, Lu Xiaoya blushed instantly as she thought about what the uncle said just now...

"No, why is your father here?"

"My family used to be in Luoyu County, very poor. And it was a sad place for my dad, so one of my requirements for coming to the University of Physical Education to study mathematics was to bring him and my cousin to the capital. My cousin was arrested It's arranged in the library of the Mathematics Research Center of Yanbei University, my dad chose this place. But it won't last long, and it will be transferred around next week." Ning Zi explained casually.

Lu Xiaoya knew something about Ning Zi's past.

After all, during the period when Ning Zi dropped out of Huaqing, I don't know how many times I swiped the screen on the Internet.

Until now, Huaqing University’s official Weibo, some netizens rushed in and joked in the comment area, “I heard that Huaqing gave up a Turing Award winner, a Fields Medal winner, and a richest man in the invisible world. Are you serious?"

But after all, not much is known.

It was only at this time that I heard some more insider things. It turns out that you can still take care of your family when you go to college?
"You are amazing." Lu Xiaoya praised sincerely, and then couldn't help asking: "Ning Zi, didn't you drop out of Huaqing on purpose?"

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

The kitten squinted his eyes, enjoying himself.

"I don't want to answer this question." Ning Zi shook her head.

"Oh, it seems that what is said on the Internet is true. Next time you meet that kind of self-indulgent woman, you can ask me for help. Let me tell you that I have a good way of dealing with this kind of woman. I used to be in high school At that time, there was a classmate in the class who was very sweet, and she talked bad things about me everywhere, but she always avoided me when she saw me later." Lu Xiaoya said very high-spirited.

"You hit her?" Ning Zi asked casually.

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

The corner of Ning Zi's mouth twitched subconsciously, and she looked up and down the small body of the girl beside her with a look of doubt.

Although he believes that there are women with strong fighting power, such as Zhai Qiuxian, but the strength of that woman can really be seen with eyes.As for Lu Xiaoya...

"Hey, what's your expression? Let me tell you that I have been practicing kickboxing since I was a child. And my dad also taught me a lot of anti-joint and elbow skills that are forbidden because of their lethality. You don't like to look down on people. "

Ning Zi was silent.

"Heh... you hold Little Sanyue, let me show you." Lu Xiaoya handed over the kitten in her arms.

Ning Zi froze for a moment, then subconsciously picked up Sanyue.

Without the kitten in her hand, the girl suddenly turned serious, looked around, then looked in one direction, trotted for two steps, then jumped up, flipped easily, and jumped into the side of the road in the community In the green area, before Ning Zi could react, after landing, he kicked a whip kick directly at a small tree that was about two times thicker than a baseball bat...

This leg obviously didn't take much effort, causing the trunk of the poor little tree to tilt to the other side obviously, and then retracted the leg. When the little tree bounced back, a wrong step was followed by a direct elbow.

Ning Zi heard a "click" hidden in the slight "rustle" of the leaves shaking. Although the small tree did not break, a crack could be seen in the middle...

Before Ning Zi could feel emotional, there was a sudden shout from the other side of the community: "Hey, what are you doing? Little girl, this tree provoked you? Whose child are you? Stop!"

The girl, who was still too strong just now, froze for a moment, then quickly jumped out of the green belt, and stood obediently by the side of the road.

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

"You... uh, Ning Zi?"

"Well, I'm sorry, teacher, my friend was a little excited just now. I'm really sorry, I will get someone to check this tree later, and if there is a problem, I will plant a new one. I promise she won't be next time " Ning Zi bowed slightly, and then apologized.

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

If it wasn't for the obvious expression of disbelief on his face, Lu Xiaoya probably wouldn't have thought of proving herself in this way.

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

The middle-aged woman said something to Ning Zi with a smile, then looked at Lu Xiaoya and said, "It's just a little girl. It's a trivial matter to lose your temper and kick a tree, but you must never kick people like this? You started practicing when you were young. Are you majoring in competitive sports training or martial arts?"

"Martial arts major." Lu Xiaoya answered in a low voice.

"No wonder. All right, then you guys do your work first, young people don't have anything to do and don't quarrel." The middle-aged woman explained to the two of them again, then turned and left.

Only then did Lu Xiaoya stick out her tongue, shrink her neck and return to Ning Zi with a bitter face.

"I admit that you are very good, let's go." Ning Zi said seriously.

"Not as good as you, but fortunately you are here, otherwise I would be miserable." Lu Xiaoya said with lingering fear.

She knows the fighting power of those middle-aged women in the community.

After all, this is a teaching and staff community of the University of Physical Education, and most of the residents are teachers and staff of the University of Physical Education.She can be stuck talking about the truth for an hour if she gets too wordy, and she might even have to call the counselor by the way...

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

"what?"

"I probably won't have the chance to cause some small troubles that only students will encounter in the future. You can help me experience another kind of student life." Ning Zi explained.

This time, Xiaoya was stunned by Ning Zi's obviously abnormal thinking mode.

"Then you keep your word."

"I always keep my word."

"Forget it...forget it, it's too childish!"

"Pull the hook!"

……

Ning Zi found that if Lu Xiaoya's figure and appearance were ignored, it was safe to treat the little girl as a man.

For example, when he came to Lu Xiaoya's rented one-bedroom apartment, he just watched Xiaoya pack the monitors and case directly with his hands and feet.People who seldom send couriers must not have such a quick way.

Originally, Lu Xiaoya planned to carry the monitor and case to Ning Zi directly.

But Ning Zi was still too embarrassed to let a girl do all the hard work.

So Ning Zi was holding the monitor, Lu Xiaoya was holding the case in one hand, and the kitten in the other.

The relaxed appearance made Ning Zi suddenly interested in biology and sports science, mainly to study why a body that doesn't look stout can contain great strength.

……

After moving the computer to Ning Zi's room in the administration building, Lu Xiaoya said that she still had class in the afternoon, so she quickly slipped away.

Ning Zi left Sanyue in the room and walked out of the room again.

Although I met with my father just now, there was no communication after all.

He came to the gate of the teaching and staff quarters again, this time Lao Ning had already walked out of the concierge.The father and son were still not so particular, they started walking along the street, and then simply sat down on the curb.

No way, I'm used to it.Ning Zi still remembers that when his father took him for a stroll in the county town when he was a child, he just found a place to sit casually when he was tired, which was kind.

"I heard that when you went out this time, you not only won an award, but also did something great?"

"It's not a big deal. It's just that I can get back some things that belong to me."

"Tsk tsk tsk, you're promising, and your tone of voice is different now. Leader Luo said that you are now the richest man in the world."

"That money has other uses, and it will be spent like running water. The news will explain it to me in a few days, and the money will be invested in doing some more important things, but the rest of it is indeed enough for our family to spend a few days. Forever."

"Then what should I do? I'm not ready yet... Do I have to watch TV and learn how those rich people live, so as not to embarrass you if I go out in the future?"

"Oh, then you learn to take the time to teach me, and I'm not very good at living the life of a rich man."

Ning Zi responded casually, then took out an ICBC bank card from his pocket, handed it over, and said, "This is the bonus I got this time, and some previous rewards, all of which have been changed for me. Renminbi, there are more than 1000 million in it, you should use it to learn.”

Lao Ning took the bank card handed over by Ning Zi, and said with emotion: "More than 1000 million, I probably won't be able to earn that much in my whole life in logic and plumbing, right?"

"You don't have to work so hard for me to study, and we can't earn so much if we connect the water pipes for a lifetime."

"What happened to that little girl today?"

"a friend."

"Is it a girlfriend or a friend?"

"do not know."

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

"We are still friends for the time being. 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 in the past six months. I'm very polite, my tutor is good, and I'm rare. And I've never come back with anyone who is neither. In my impression, I never Went out."

"Aren't all college students like this?"

"Who said that? There are several students from your school rented in the community. They often take a taxi back in the middle of the night on weekends and get drunk. You can smell the smell of alcohol from far away. You need to find someone like that, I do not like."

"Don't you like to drink?"

"I still like to eat pork. Will you live with a pig in the future?"

"Don't talk about it."

"How can we not talk? Baby, you are sometimes cold, and your sister and I are worried that you will not find someone in this life. If you are okay, you should make it early. I know that you young people think differently from us now. It’s the same. There are a set of new words, such as single nobles, and DINK families. But people, you can’t be too selfish in your life, leaving more or less offspring, this is a big matter related to the reproduction of the entire human race. Well, in the past That's what it says in the animal world."

Ning Zi: "..."

"Yes, I know you don't like to hear it. When you finish your work recently, go to Uncle's to have a meal. Make sure you have a good time and tell me, and I will ask your uncle to prepare it."

"Okay. By the way, Sister Xiao is in love. She is a mathematics professor at Yanbei University."

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

"How do I know?"

"You should know that professor, right? How is he?"

"good."

"Then I have to tell your uncle the good news. I might as well ask Ning Xiao to bring him back next time, so we can meet."

"You've seen it before. On the first day when you came to the capital to have a welcome banquet, he sat diagonally across from you, called Fang Xu."

"Eh?" Lao Ning frowned in thought, then shook his head: "I don't really remember."

"Well, then I will remember when I see you again."

"Okay, go ahead."

"it is good!"

……

Rio de Janeiro, Brazil.

Fang Xu, who had just fallen asleep, was awakened by the noise outside the door. He picked up his phone and checked the time. It was already 11:30 in the evening.

Regarding the fact that the hotel room is not soundproof, Fang Xu just feels powerless to complain.

However, I heard that the higher-level rooms are soundproof.

I was planning to go to the toilet and continue to rest, when I suddenly saw the mobile phone prompting that an unread email was received in the mailbox, the key is that the recipient's mailbox is very familiar.

Ning Zi's email address?
Fang Xu immediately sobered up.

Subconsciously clicked on the mailbox, then froze.

Seeing the sentence "I will agree with you and my cousin when I finish this project", Fang Xu's mind was stunned.

how to say?

Probably there is a feeling of returning to before the college entrance examination.

At that time, the teacher said the same thing, as long as you work hard, you can go to Huaqing and Yanbei.

It never occurred to him that he had already become a professor at Yanbei University, and he still had to meet this kind of assessment.There is always a sense of ridiculous absurdity.

So Fang Xu subconsciously downloaded the questions given by Ning Zi to his mobile phone.

After clicking on it and looking at it, my mind was even more confused. What Ning Zi gave was a number theory problem.

"If A is an infinite subset of positive integers, and the reciprocal sum of all numbers in A diverges, then A contains arithmetic progressions of any length."

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

But Fang Xu was stunned the moment he saw this question.

He didn't even know whether Ning Zi thought highly of him or was planning to separate him from Ning Xiao.

Because the correct description of this problem is called Erdös reciprocal and conjecture, the well-known problem in the number theory field is still a Fields Medal-level problem.It is the same as the Navis-Stokes equation, as long as it is proved and recognized by the academic circle, it will immediately win the Fields Medal.

There is one thing to say, this is much more difficult than the college entrance examination questions.It belongs to the kind of thinking and argumentation that can be started after mastering advanced mathematics. The threshold seems not high, but it has not been proved after so many years.

The only progress so far is to prove that prime numbers and reciprocals are divergent and contain arithmetic progressions of arbitrary length.However, the proof method of the predecessors is very special, and it cannot be extended to ordinary situations at all, so this is still a number theory problem with a low research limit but a high difficulty limit.

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

Because the main energy is devoted to the research of this level of difficulty, the biggest possibility is that after many years of research, I wasted my youth and have nothing.

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

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

Fang Xu could hear Fan Zhenhua's voice, who was giving him away politely.

It can be seen that today's meeting of the bosses chatted for a long time, from 11 pm to 30:[-] now, it has been five and a half hours.

Finally the sound outside quieted down. Fang Xu was about to go out to have a look, but he heard a light knock on the door.

"Xiao Fang, are you asleep?"

"Not yet, here we come."

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, clean up today first, we will return to China tomorrow, this meeting cannot last."

"Okay, Academician Fan." Fang Xu agreed, not surprised.

He could probably figure out what happened too.

Few people knew about Fang Xu's relationship with Ning Xiao. Even a small person like him could be specially sought out to corrupt him. One can imagine how big the two big shots would be.Not to mention standing in their position, many times it is not even a matter of money.

Some things are really annoying.

"Okay, that's it."

"Forehead……"

"Why, what else is there?" Seeing Fang Xu's hesitation, Fan Zhenhua asked.

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

"Research subject? What subject."

"Erdes counts and conjectures."

"Ahem..." Fan Zhenhua coughed violently.

But looking at Fang Xu, there is obviously a lot of emotion: "Good thing. Remember, when you go to the University of Physical Education next year, do a good job, and don't miss the teaching task. But this project is still in our Yanbei International Mathematical Research Center what."

"No, Mr. Fan..."

"Don't worry, Ning Zi specially arranged this project for you, and there is a high probability that I believe you can solve it. Think about Ning's cutting method, do you understand? Do it well, maybe there will be a second Phil in Huaxia in four years' time." Here is the winner." Fan Zhenhua raised his hand and patted Fang Xu on the shoulder.

Fang Xu was stunned. He felt that Fan Zhenhua was too optimistic about this matter.

……

Yanbei Sports University, Administration Building.

Ning Zi has already returned to the room.

The computer that Lu Xiaoya gave was put aside, and Ning Zi was checking the keywords in the theoretical content about Lu Xiaoya and the merchant on the Internet.

Such as mining cards, tooling graphics cards, etc...

Soon, I probably understood the cause and effect.

To put it simply, a virtual currency called Bitcoin is very valuable. As for why it is very valuable, it is because it has extremely scarce attributes, the total amount is fixed, and it has a technology called blockchain.

The reason why the so-called blockchain technology is powerful is that each block stores certain information, as long as there is a server in the system working, the entire blockchain is safe, and these servers are called nodes; another It 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 seems 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 it.

The process of consuming a large amount of power resources and using GPU powerful mining cards for calculation is called mining.Those cards used for mining are called mining cards. The so-called tooling graphics cards are actually graphics cards shipped directly by the manufacturer to the mine owner. Because the other party doesn’t care much about the packaging, they simply omit the packaging to save costs...

Of course, if the brand-new tooling graphics card is similar to the graphics card sold to players, then the used mining card may look very new, but in fact, in order to maximize the profit, the miner often uses the GPU to calculate overclocking, which is basically a hidden injury. Tired.

Mining disasters refer to the fact that various virtual currencies have recently experienced a painful drop driven by the sharp drop in Bitcoin. Many mine owners have finally mined virtual currencies that cannot even be exchanged for electricity bills, so they reluctantly sold the most valuable graphics card Sell ​​it at a low price, and let a bunch of mining cards flood the market.

After roughly understanding the cause and effect, Ning Zi felt a little bit moved by the power of the Internet information cocoon.

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

But at the same time, he really didn't think too much about the cognitive logic that many people believe that the various virtual currencies based on Bitcoin have value.

Consuming so many resources, doing something that has no meaning at all, and then endowing it with so-called cognitive value, even though many virtual currencies have been proven to be deceptive, and even trapped countless people, there are still people who are eager to do it. go in.

Even Huaxia officially announced that this thing is not recognized, but it still can't stop those believers.

Ning Zi thought this matter was very interesting.

How should I put it, the entire set of logic of the so-called virtual currency is based on the fact that everyone recognizes that the blockchain technology is extremely secure, and no one can tamper with the Bitcoin wallet.So money is extremely safe.

In other words, if he can prove that the money is not safe at all, and there is a way to deceive more than half of the nodes in the chain through the corresponding key at any time, 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 strengths, especially since this thing relies on the Internet. According to the current coverage of Cisco, Samsung, Logia and other telecom network products in those developed markets, he even has a way to make all areas The blockchain collapses once a day...

After thinking about it, Ning Zi decided to give courtesy first and then fight.

He took a screenshot of the conversation between Lu Xiaoya and the other party on WeChat, found the merchant on the platform, then sent the screenshot to the customer service, and typed a paragraph seriously: "Please follow the fake one in the advertisement on the homepage of your product. Ten fines, ten new unopened genuine graphics cards of the same type will be refunded to the account in the picture above, otherwise you will be responsible for all consequences caused!"

Soon, the customer service replied, first a question mark cleared the way.

Then he asked very humblely: "My dear, is there something seriously wrong with your mind?"

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

After all, this is another big fun to watch!

(End of this chapter)