Ling Xing changed her mobile phone a year ago, which means that she and Su Qingluo had added WeChat friends as early as a year ago, and she didn't bother to think about the specific time and motive.

When she first played WeChat, she did have a lot of friends who added her, and at that time she was afraid of missing a certain one, and she added it regardless of whether there was verification information or not, or it may have been at that time that Su Qingluo was added.

Zeng Zhile on the side looked at Ling Xing and then at Su Qingluo, as smart as her, her eyes immediately had a little insight, but she still pretended not to know anything: "Come on, Su Qingluo, it's time for the two of us to add friends."

Su Qingluo clicked his finger on the screen a few times, and took advantage of the situation to light up the QR code in front of Zeng Zhile.

Drip!

The addition of friends was successful, Zeng Zhile and Su Qingluo did not appear to be friends with each other.

The library has always been a relatively quiet place, most people are reading books quietly, and those who want to chat keep their voices low.

After the three of them added friends to each other, they stopped talking and bowed their heads to learn from each other.

Ling Xing was still struggling with the last big question on the test paper, it was the same before, almost every time she took the exam, she would be stumped by the finale, sometimes it took one or twenty minutes to solve, but more often she would lose points because of the finale.

When she was a freshman in high school, the head teacher also analyzed Ling Xing, saying that her liberal arts grades were good, and she would always spend less brainpower on literature than science.

Ling Xing didn't listen, and neither did the girls who had similar grades to her, and they didn't agree with the words of the head teacher of the first year of high school that the words of the girl were not as flexible as the boy's.

There are indeed people in this world who have extremely high talents in learning, but those are only a very small number of people, most of them are still ordinary people, and what kind of results they want must put in what kind of effort.

When he calculated the unsolvable answer again, Ling Xing almost thought that this was the correct answer.

A pen tip was pointed on the second formula of her finale, and the young man's deliberately lowered voice came from her ear: "The proportional sequence leads to the formula: a1=s1=2a-1=a1=1, you are confused by the formula given, leave it alone, you calculate it in your own way." ”

Ling Xing was stunned, she couldn't believe that the teenager in front of her, who had handed in most of the blank papers and scored 12 points, was actually teaching her how to solve the problem?

That's a big deal!

But Ling Xing is not a person who does not listen to persuasion, this big problem has trapped her for so long, she has tried all kinds of problem solving methods, and it doesn't hurt to try what Su Qingluo said again.

She changed a new piece of scratch paper, listed a few formulas, and began to solve, and finally came up with the answer: an=3/2 [2n-2+(-1)n-1]

This answer seemed to be correct, and in order to ensure the correctness, Ling Xing checked it again......

Then she raised her eyes to look at Su Qingluo, who was sitting directly opposite her, and she couldn't say a word for a long time, is this a coincidence or ......

Su Qingluo didn't seem to notice Ling Xing's gaze, he was reading an extremely thick novel, and he was reading ten lines at a glance just now, which Ling Xing had been staring at for a long time and hadn't turned the page.

However, Ling Xing didn't notice these small actions, Su Qingluo didn't know it, and only Zeng Zhile silently endured everything during the whole process.

At about half past ten, another acquaintance came over to the library, and he looked around, but there were basically no empty seats in the library at this time.

A desk can seat four people, and Ling Xing's side can also seat one person, so he walked to Ling Xing's side and gently tapped the table with the index finger phalanx of his right hand: "Hello classmates, you still have a vacant seat here, can I sit?" ”

The voice sounded familiar, and the attitude was even more gentle and polite.

Ling Xing looked up and recognized him at a glance as the boy who joked Zeng Zhile about grabbing a ball in physical education class a few days ago, but he didn't get any bargain with Zeng Zhile that day.

Of course, anyone can sit in the empty seat in the library, Ling Xing has no opinion, Su Qingluo didn't even raise his head the whole time, he didn't care if there was someone sitting next to him at all.

But Zeng Zhile was different, the enemy was very red when he saw him, and after Pei Yan sat down opposite her, she endured a few endurances, but she couldn't hold back the yin and yang weirdness: "Tsk! People who are weak are different, the sun is about to set, so they want to come out to study. ”

How could a person as smart as Pei Yan not hear the meaning of Zeng Zhile's words, he glanced at Zeng Zhile's practice notebook, put down his glasses with his right hand, and smiled gently: "It's okay to be weak, it's better than some people who are half-crippled, and can't write hard and can only write in dog planing style." ”

The words that came out were not so gentle.

Zeng Zhile's most annoying thing in her life is that others say that she writes like a dog, she slapped the pen in her hand on the practice book, and glared at Pei Yan angrily: "Whose words do you say are like dogs?" ”

Pei Yan shrugged his shoulders indifferently: "When I am talking to myself, don't take it to heart, and don't sit down." ”

I'm seated in Nima, you step on the horse to see if I'm the only one practicing calligraphy in the entire library?

Zeng Zhile was itchy no matter how angry her teeth were, and she couldn't do anything about the tasteless man in front of her, she took a few deep breaths, and was still puzzled: "No taste." ”

Pei Yan put the Bluetooth headset he carried with him in his ears, and pretended to be kind and asked Zeng Zhile: "Do you need it?" ”

Nima is needed.

Before Zeng Zhile could say anything, he immediately withdrew his hand and gently pulled the corners of his mouth: "Oh, I forgot, I didn't taste it, and the songs I listened to naturally won't have a taste." ”

Zeng Zhile: "......"

Exercise! It's so angry!

This time, the people who eat melons have successfully changed from Zeng Zhile to Ling Xing and Su Qingluo.

At noon, Ling Xing and the others didn't go home, and the four of them had lunch in the noodle restaurant diagonally opposite the library, and then went to the library again.

Seeing that Su Qingluo and Pei Yan were sitting down and reading a thick novel, Ling Xing couldn't understand it, she tried to persuade them euphemistically: "I heard that we are going to find out next Friday?" ”

Su Qingluo raised his head: "So? ”

Pei Yan didn't know why: "Then?" ”

"Only the top five in the class are eligible to choose their own seats," Zeng added.

Su Qingluo and Pei Yan nodded at the same time: "Oh." ”

Pei Yan didn't even want to pretend: "I don't care, you can sit there."

Zeng Zhile sneered and scolded Pei Yan: "Why don't you just say that you have poor grades, and you don't have to choose if you want to."

Pei Yan restrained his smile slightly: "It's not too bad, it's definitely more than enough on top of your grades." ”

Flamboyant and confident.

"Phew!" Zeng Zhile sneered again and again: "I'll just say how the cow in the sky is flying, it turns out that you are blowing on the ground!"

Pei Yan's smile slowly froze at the corner of his lips: "......"

But he soon regained the self-confidence of a young man: "I never lie, let's wait and see."

Zeng Zhile has nothing to fear.

Ling Xing looked at them for a while, and couldn't help but think, what kind of roles did Zeng Zhile and Pei Yan have in the book?

They are obviously flesh and blood, they can cry and laugh, they are all living beings in the three thousand worlds, they can touch the sunshine with their hands, they can feel the fragrance of birds and flowers, and they will work hard for their goals and ideals......

How could they be the paper people in Qiu Yilin's eyes?