"Counting one?"

Although Zhou Yan does not major in advanced mathematics, he is still a mathematics major. When he was a sophomore, he also received private orders to tutor advanced mathematics and tutored several students in other majors who did not want to fail the course. Although more than ten years have passed.

Well, Zhou Yan definitely couldn't remember which textbook he used, but he could definitely pick out the most suitable one after taking a quick look at it.

Zhou Yan put aside the three books he bought, glanced at the bookshelf, and pulled out five advanced mathematics teaching aids from the bookshelf.

Zhou Yan turned over it carefully.

Xing Xuan was currently looking at the three books that Zhou Yan had put aside. She knew mathematical analysis...advanced algebra...analytic geometry...analytic geometry, but the other two books gave her a headache when she heard their names.

"Is the senior a mathematics major?" Xing Xuan asked curiously.

"Well, yes." Zhou Yan responded casually and put two advanced mathematics books that were inferior in terms of arrangement and logic back to the bookshelf.

"Senior is very good." Xing Xuan pursed her lips and smiled.

"It's okay." Zhou Yan smiled and handed the remaining three advanced mathematics teaching aids to Xing Xuan, "Choose one of these three books."

"Senior, why don't you choose for me?" Xing Xuan blinked at Zhou Yan.

"How about I talk about the advantages of each, and then you can think about it." Zhou Yan said with a smile.

"Okay." Xing Xuan handed the three books to Zhou Yan.

Zhou Yan first took out a teaching aid that was a little older and slightly thinner than the other two. It had "Intensive Lectures on Advanced Mathematics" written on it.

He said: "This book focuses on knowledge points, there are not many question types, and the difficulty is relatively easy."

"Yeah." Xing Xuan nodded and took the book.

Zhou Yan took out another teaching aid that was 80% new, medium-thick, and had "Selection for Advanced Mathematics Questions" written on it.

"This book focuses on question types and does not cover many knowledge points. It is divided into modules of low, medium and high difficulty, which is suitable for brushing up on questions." Zhou Yan handed over the book "Advanced Mathematics Question Type Selection".

"Thank you, senior, what about the last one?" Xing Xuan took it and asked with a smile.

"The last one is not very good at typesetting, but it is very professional. It summarizes knowledge points and some key question types, and is suitable for a final assault." Zhou Yan handed over the last slightly older one and said with a smile.

The last one is called "Advanced Mathematics Practice", which is a collection of lecture notes compiled into a book.

The editor-in-chief above was still the teacher who taught him "Mathematical Analysis". Zhou Yan was a little surprised when he saw it.

"Sorry, senior," Xing Xuan said with a smile while holding three teaching aids.

"So have you decided which one to choose?" Zhou Yan asked.

"It's all taken." Xing Xuan said directly.

"All...all?" Zhou Yan was stunned and looked at this girl again who looked very pure, sweet and had a strong bookish temperament, "Are you sure? Can you learn so much?"

"Didn't Senior just divide the functions for me?"

Xing Xuan said with a smile, ""Advanced Mathematics Question Type Selection" focuses on question types and can be used to practice questions in daily life. "Advanced Mathematics Essay" focuses on knowledge points and can be used for after-class consolidation. "Advanced Mathematics Practice" can be used

These three books are all good for final assault."

"As for time, time is squeezed out." Xing Xuan blinked at Zhou Yan again.

Zhou Yan twitched the corner of his mouth, "As long as you are happy."

Xing Xuan only thought that this senior was cute and very real. She smiled and asked: "Senior, can I add you on QQ? If there are any questions that I don't know, I want to ask you."

Zhou Yan said in his heart that it was exactly what I wanted. After all, in front of him was a beautiful girl with good looks and good looks, and he was still happy to make friends.

Zhou Yan smiled and nodded, "Okay, what is your QQ number? I'll add you."

Xing Xuan reported her QQ number.

Zhou Yan took out his mobile phone, quietly changed his QQ nickname to a ‘.’ and then chose to add Xing Xuan as a friend.

Xing Xuan’s nickname is [A dog imitates a dog and shakes its head], and her avatar is that of a cool anime girl wearing black glasses.

Zhou Yan couldn't help but laugh when he saw this, and said, "I can see that you love to study."

"Senior, don't laugh at me."

Xing Xuan smiled and said, "But the senior's nickname and avatar are very simple."

The nickname is just a ‘.’, and the avatar is a cartoon male avatar that comes with QQ. It couldn’t be simpler.

But since she was studying mathematics, it must be simple and straightforward, and Xing Xuan didn't think much about it.

"Yeah." Zhou Yan nodded and said nothing more.

Xing Xuan briefly chatted with Zhou Yan about study matters again, and felt that Zhou Yan knew a lot. Some things that she did not understand or even were unclear about were suddenly understood by Zhou Yan, and even some of the things Zhou Yan told Xing Xuan

, which would allow her to get better grades and prepare for graduate school. Xing Xuan made up her mind to communicate more with this senior. She could ask this senior for advice on some things she didn't know.

It was almost time. Zhou Yan and Xing Xuan went to check out together. During this period, Xing Xuan also noticed that Zhou Yan was wearing big pants and big slippers. She also covered her mouth and smiled, thinking that this senior was quite eclectic.

After that, Xing Xuan said goodbye to Zhou Yan and left with three textbooks in her arms.

"How's it going, young man? Uncle has done you a big favor, right?" the bookstore owner asked with a smile.

"Yeah." Zhou Yan nodded.

"Speaking of which, I would also like to thank you, young man, for letting me sell three more textbooks." The boss thanked me.

"You're welcome." Zhou Yan waved his hand.

"How about it, young man, are you interested in working part-time in your uncle's shop? I think you have a lot of insights into the selection of teaching materials." The boss asked with a smile.

Zhou Yan shook his head, "I don't have much time."

"Yes, I'm taking the postgraduate entrance examination." The boss didn't pay much attention, and he asked again: "Young man, why don't you add me on QQ? It will be easier to buy books in the future."

"OK."

QQ is quite a fashionable thing these days, and everyone from primary school students to middle-aged people basically use QQ.

This is understandable. After all, just the QQ farm in QQ space can attract a large number of uncle fans. Although Penguin copied it from Kaixin.com, it seems not worth it in this era when traffic is king.

Mention.

When Zhou Yan returned to the dormitory, he found that the two live treasures who had gone to the Internet cafe all night were still snoring. Chen Xiaole had woken up and was playing LOL in front of the desk. Chen Xiaole's curses were worthy of Zu An's name, but strangely, there was no

Waking up the two living treasures on the bed behind me, I can only say how much fun I had last night and how sleepy I am now.

Zhou Yan could only reluctantly eat the breakfast given by Xiao Li'er, but he still brought a breakfast to Chen Xiaole. Chen Xiaole casually said "Thank you" and started to concentrate on playing the game.

Zhou Yan walked to the balcony and admired the scenery outside the window.

Zhou Yan is in Building 18, and the building opposite is Building 14, where the School of Management is located. Between the two buildings is a small garden, which is planted with a large camphor tree, a small piece of metasequoia, and some other tree species.

.

Including the agarwood osmanthus that grows against the college's bulletin board, it has now turned orange. The osmanthus is clear enough to stand out from the dust, and thick enough to spread far away. Even if Zhou Yan is far away from it, he can still smell the fresh and tangy scent.

The scent of osmanthus.

There were trails in the forest, and Zhou Yan could see several couples walking in the forest, and some even hugged each other and played kissing games.

"Fuck! This is amazing! Brother Yan, come here quickly!"

Chen Xiaole suddenly screamed from behind and shouted.

Zhou Yan rubbed his eyebrows, surprised by this.

He came to Chen Xiaole's side and asked, "What's wrong?"
Chapter completed!