The key class drew a successful end to the end of the first semester of the second year of high school with a beautiful result, and Guan Zhengxing also embarked on a seven-day National Olympiad winter camp training.

Before leaving, Shen Zilu called him, and Guan Zhengxing picked up: "Hey." ”

"It's me, it's me."

"Hmm."

"How many days are you going?"

Guan Zhengxing said: "Seven days." ”

"Can I call you then?"

Guan Zhengxing: "Don't bother me. ”

Shen Zilu pouted, "...... Hey, can't I ask you questions? ”

Guan Zhengxing said coldly, "Are you sure you want to ask me about your summer homework?" ”

Shen Zilu said: "If it's inconvenient, tell me your Q.Q number, and I'll send you Q.Q questions if I don't understand." Message me back when you're resting. ”

Our classmate Guan refused very facelessly, "I don't have time." ”

“…… All right. Shen Zilu said, "Goodbye, I wish you good results." ”

Before hanging up, he said a string of numbers.

“1603612355。”

“……”

Honk...... After a long busy sound, Shen Zilu reacted, "Oops??? She threw the phone and jumped to the computer desk, and after turning on the phone, she eagerly logged on to Q.Q, muttering as she pressed the number keys while searching for the number, "1, 6, 0, 3, 6, 1, 2...... Ay? 2. How many are coming? 4？ 3？ 2455？ 2355？ ”

Ahhhh......h Shen Zilu was fed up with forgetting this hard injury in an instant, she pulled her hair and complained to herself, "At the critical moment, can your brain be better." ”

Alas...... Sigh and reminisce again.

She searched for 2455 first, and her nickname was 'Love No L Deed'. Such a non-mainstream name, it doesn't look like him, and I searched for 2355, and the nickname is an infinite symbol '∞', and the avatar is quite individual, a somewhat cold male hand-drawn picture.

That's right, this should be him, click on the information and glance at it, tsk, Xueba is really a Xueba, and even the personality signature has a taste of Xueba (high) Ba (cold) - don't chat, don't disturb if you have nothing to do

"Don't make small talk? I'm hehe, Q.Q isn't it just for small talk," click to apply to add friends, enter the information: Sesame open the door, "Don't disturb if it's okay?" I have nothing to bother you. ”

After waiting for a while, without waiting for his added information, Shen Zilu typed it again:

You have the ability to rob a man, you have the ability to open the door!

Still not added, type:

Don't hide inside and keep quiet, I know you're home!

Don't add, then type:

Open the door, open the door, open the door! Guan Zhengxing! Don't hide inside and be silent!

Shen Zilu stared at the screen and gritted her teeth, "You tell me Q.Q and don't add my friends, what kind of trouble are you making!" ”

She was so angry that she closed the window and went downstairs.

Cui Anya came out of the bathroom after applying the mask, saw her pouting and looked unhappy, and asked, "What's wrong Xiaolu?" ”

Shen Zilu went to the refrigerator to get juice, poured a glass and walked to the living room, "I'm tired of studying." ”

"I'm tired and take a break."

The mother and daughter sat opposite each other in front of the sofa, Shen Zilu watched TV, and Cui Anya leaned on the sofa and closed her eyes to rest.

"Mom, get me a peach."

Cui Anya pressed the mask on her face, "Take it yourself, I'm wearing a mask." ”

"Oops, you get it for me." Shen Zilu kicked Cui Anya's leg with her foot, Cui Anya sat up, took peaches from the fruit bowl and gave it to her, "What are you lazy about." ”

Shen Zilu went to the sofa, eating peaches and watching TV, "Anyway, you can afford to raise me, I'm too lazy to be afraid of anything." ”

Cui Anya said: "Now we can raise you, who will raise you when you grow up?" ”

"My dad, he said he could afford me."

"You're married, and your dad is raising you?"

"Ah, he doesn't support me, who supports me."

Cui Anya said: "Raising children to prevent old age, what do we want to raise you?" ”

Shen Zilu bit the peach, chewed and didn't speak.

Cui Anya: "You are young, you are not sensible?" Or are you trying to do something, what you can't eat, what you can't eat? ”

Shen Zilu rolled her eyes, got up and walked upstairs. There was a mother's nagging behind him, "The backing mountain will fall, and everyone will run." You have to remember that the most reliable person is yourself. ”

"Got it." Long-winded.

Back in the room, Shen Zilu looked at Q.Q, but still didn't receive Guan Zhengxing's passing message.

"Hey, if you don't add it, you won't add it."

……

On January 7, Guan Zhengxing officially entered the winter camp for a seven-day training, and he paid more attention to the teachers of the training camp. Looking at the propaganda board placed at the entrance of the training camp, the four main lecturers are strong.

Xie Gengfan, in charge of geometry specialty, graduated from Shanghai Jiaotong University, and served as a student in Shanghai. He is familiar with the plane geometry test questions in the domestic and international mathematics competitions in the past ten years, and is good at using the geometry sketchpad to explore plane geometry problems;

Xiang Rui, a special tutor in algebra, won the first prize in the high school mathematics league at the age of 15, won the gold medal of the International Mathematical Olympiad IМO with perfect scores for two consecutive years in 91 and 92, graduated from Peking University, and went to the Massachusetts Institute of Technology for further study, and obtained a doctorate degree in 2003;

Gu Zhao, a mathematical prodigy, the youngest doctoral supervisor of Tsinghua University, has won the gold medal of the International Mathematical Olympiad IМO in 93-94, has a unique set of insights and methods for the teaching of mathematics competitions, and is good at various difficulties above the second test. Ten of the students he has taught have entered the Chinese IМO national team, four of whom have won international IМO gold medals, and are responsible for the combination of special training.

Ji Xiangchun, responsible for the special project of number theory, is a professor of Nanjing Normal University, a doctoral supervisor, a well-known expert in number theory, and a member of the invited editorial board of "Refined Mathematics". She has served as a member of the main examination committee of the Chinese Mathematical Olympiad and the Women's Mathematical Olympiad for many times.

Among the four people, Guan Zhengxing pays the most attention to Gu Zhao, the youngest doctoral supervisor at Tsinghua University.

The door of the room was opened from the outside, He Tianyi walked in and handed Guan Zhengxing a form, "The team leader teacher just sent it, I'll help you bring a copy back." ”

Guan Zhengxing took it, "Thank you." ”

He looked down at the training schedule, and He Tianyi asked, "Which teacher do you pay more attention to?" ”

Guan Zhengxing's eyes fell on the youngest doctoral supervisor at Tsinghua University, "Gu Zhao." He put his arm on the back of the chair and turned around, "What about you?" ”

He Tianyi said: "I am interested in Xiang Rui, a 15-year-old miracle, and I especially want to meet him." ”

Guan Zhengxing nodded, turned back to put the class schedule away, and continued to brush up on the questions.

He Tianyi took out a change of clothes, "I'm going to take a shower first, and I have to get up for morning class tomorrow." ”

Guan Zhengxing: "Okay." ”

At one o'clock in the morning, He Tianyi opened his eyes in a daze, and the desk lamp was dimly lit.

"You haven't slept yet?" He Tianyi asked.

Guan Zhengxing turned around, "Is the light too bright to wake you up?" ”

"No, I have a problem going to the toilet in the middle of the night."

He Tianyi closed the door of the bathroom, closed Zhengxing before turning around, and turned down the brightness of the desk lamp.

At six o'clock in the morning the next day, the alarm clock rang on time, He Tianyi turned over and pressed the electronic watch on the bedside table, and the quilt on the bed was folded neatly, and then he heard the faint sound of washing water in the bathroom.

No way?!

The door opened, Guan Zheng walked out, and He Tianyi asked, "You won't sleep all night, will you?" ”

"I fell asleep, and I just woke up."

He Tianyi was curious, "What time did you sleep?" ”

Guan Zhengxing recalled, "Two o'clock. ”

"Oh my God, you're ruthless!" I didn't say the phrase 'too hard', but I had already written him down in my heart.

What you are most afraid of encountering in this training camp is an opponent who is smarter and harder than you.

Guan Zhengxing put on the coat of the training camp, "Pack up, get ready to go down and have breakfast." ”

"Okay, I'll get up."

He Tianyi got dressed, and the two left. Room.

……

The first class left a deep impression on the students, Gu Zhao looked young, but he felt very stable and old, without bells and whistles to introduce himself, wrote his name on the whiteboard and turned to face the audience, and said:

"Hello students, I am Teacher Gu Zhao of the winter camp, and I am responsible for the teaching of everyone's combination of special projects."

Then there is a simple and crude set of complex geometric figures.

Gu Zhao annotated the graph while reading the question, "It is known that the circle is connected to the quadrilateral AвСD, and its diagonal lines AС and вD intersect at the point P, △ the circumscribed circle Aв intersects E, △вСP intersects the circumscribed circle Aв in F, and the inner lines of △ADE and △вСF are I and J respectively, and the connecting line IJ intersects AС at K." Verification: A, I, K, E four points are round. Give you ten minutes to answer. ”

Under the order, the classmates worked hard to write, He Tianyi was still thinking, and when he looked again, Guan Zhengxing had already written half a piece of paper, and he felt more and more the threat from Guan Zhengxing.

Gu Zhao looked at the watch timer, and as soon as the ten minutes were up, he immediately shouted to stop, and glanced at the students in the audience, "Who stands up after asking for verification." ”

In a classroom of sixty people, there were twenty-one people who completed the verification process, Gu Zhao looked along the aisle one by one, and asked him to sit down after reading one, and only five people were still standing in the end.

Gu Zhao returned to the podium, his face was solemn, and his tone was even more solemn.

"One question almost wiped out the entire winter camp class, if you still want to enter the national team, you have to show 120,000 more points of study than now, otherwise, here," he pointed to his feet, "it will be the end of your IMO stop." ”

He Tianyi raised his head slightly, looking at Guan Zhengxing beside him, he was the first to complete the question just now, and let him take out another 120,000 points of study status, it was simply terrifying.

After class, everyone was deeply impressed by Gu Zhao and understood why the outside world called him a math wizard. Similarly, Guan Zhengxing also made Gu Zhao remember.

Some people are like gold, and they shine wherever you scatter them.

At lunchtime, Guan Zhengxing looked through the books in his hand while eating, and He Tianyi came over with a tray, "My mother said that eating and reading books is not good for your health." ”

Guan Zhengxing paused slightly, then closed the book, He Tianyi pulled out a chair and sat opposite him, and said: "The two classes in the morning really let me see, there are more people who are better than me." ”

Guan Zhengxing said: "The top 60 in the provincial Olympiad are all here, and the competition must be fierce. ”

"But I think you're the most likely to be in the national team." He Tianyi took a sip of soup, "I passed by Mr. Gu's room just now, and I heard him talk about you with several other teachers, saying that you are the most promising seedling in this class. ”

Guan Zhengxing's chewing movements slowed down, and He Tianyi said, "You are happy." ”

His face was pale, "...... I hope so. ”

He Tianyi said: "You are too modest. ”

Coming out of the cafeteria, Guan Zhengxing ran into Gu Zhao.

"Teacher Gu."

Gu Zhao looked at him without the sternness of the class, with an appreciative smile, "Why didn't you make the cut last year?" ”

"......" even knew that he didn't make the cut last year?

Guan Zhengxing was silent, "Last year...... My father died, and I had to go back to his wake. ”