The end of technology.

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……"