Nine Chapters on the Mathematical Art

Ma Feifei wasn't trying to fool them; since the system priced it so high, it must mean the private room was worth the price.

Furthermore, based on the series of products available in the private rooms, Ma Feifei believes that the key to the increase in private room fees lies in this aspect.

Who knows, even a dullard could gain supernatural insights by going into a private room and reading a book.

After accepting the Spirit Crystal from the two, Ma Feifei led them to the bookshelf at the front.

More than half of the books on the bookshelf are gone, but quite a few remain, about a hundred books.

Looking at the numerous Blue Quality books on the shelves, Gongsun Qiong couldn't help but sigh, "I remember the first time I came to Bookstore, there were very few books. I think there were only three books back then? Zhou Zhuling and her brother arrived late and could only share one."

Zhao Xiaodao nodded and said, "Yes, I remember there was a book called something like 'Thirty Poems,' which the shop owner wrote himself. He even tried to trick me into reading it after he finished writing it."

Recalling the past, although it was only a few months, it felt like a lifetime ago. Even Ma Feifei couldn't help but sigh, "Yes, it's been so long in the blink of an eye."

In the blink of an eye, Ma Feifei has been living here for half a year.

"But speaking of which, where did you get these books, shopkeeper? And why do they have such miraculous effects?" Zhao Xiaodao asked curiously.

"Xiaodao," Gongsun Qiong called out to Zhao Xiaodao.

Zhao Xiaodao seemed to realize what he had said, stuck out his tongue sheepishly, and said, "Sorry, I shouldn't have asked."

Ma Feifei smiled and shook his head, saying, "It's nothing."

However, he didn't explain anything. Everyone has an unforgettable memory and many secrets they don't want to share with others.

"What kind of books are you looking for?" Shaking off his random thoughts, Ma Feifei asked.

"I need to increase my cultivation level. My current realm is too weak; I can't protect the guild leader properly," Zhao Xiaodao said.

Gongsun Qiong laughed and said, "If there were a book similar to 'Half a Mu of Flower Fields,' that would be great, or even 'My Fair Princess.'"

She cannot cultivate, so those books that can increase cultivation level, techniques, and martial arts skills are meaningless to her.

Ma Feifei nodded and began searching the bookshelf.

The first book Ma Feifei received was a work by a School of Names.

Gu Long: <The Youngest Nephew's Sword>.

At the same time, the basic introduction of this book also appeared in Ma Feifei's mind.

<The Youngest Nephew's Sword>

Shop purchase price: 500,000. Gains: Cultivation techniques and martial arts skills. This is the difference before and after the system upgrade. Now, whenever Ma Feifei obtains any book, relevant information about that book will appear. There's no longer any need to guess what's inside each book or what benefits it can bring.

However, this item wasn't meant to increase cultivation level, so Ma Feifei put it back and continued her search.

The Bride with White Hair

Purchase price in the store: 500,000. Gains: Martial arts techniques, but this isn't included.

Seven Swordsmen of Mount Tian

Purchase price in the store: 500,000. Gains: Neither martial arts techniques nor skill sets.

The Pacification of the Demons (Tianshu Tales)

Purchase price in the store: 500,000. Gain: Cultivation points.

Ma Feifei handed the book "The Pacification of the Demons" to Zhao Xiaodao, saying, "If you can comprehend this book, it should help you improve your cultivation."

Zhao Xiaodao took the book "The Pacification of the Demons" with a satisfied look on his face.

Then Ma Feifei started helping Gongsun Qiong choose books. However, compared to Zhao Xiaodao, Gongsun Qiong read books for their artistic conception rather than for any profit, which made it much simpler. In fact, Gongsun Qiong could also read books that offered some profit, since the stories in those books were also very exciting.

But what can you do when you're a girl? She prefers romance novels and isn't interested in fighting and killing.

"Huh?" Suddenly, while searching for books on the bookshelf, Ma Feifei discovered a rather strange book and couldn't resist taking it down from the shelf.

Purchase price in the store: 500,000. Earnings: Chapter Nine: Applying Mathematics. "Holy crap!" Ma Feifei stared, utterly bewildered. This kind of book even exists?

"What's wrong, shopkeeper?" Gongsun Qiong asked Ma Feifei, puzzled.

"Ahem," Ma Feifei coughed, looked at Gongsun Qiong, and asked, "Sister Gongsun, you're a businesswoman, right?"

Gongsun Qiong nodded and said, "Hmm."

"So you must have some knowledge of arithmetic?" Ma Feifei asked again.

"Of course, the president is incredibly skilled in mental arithmetic; no one in the chamber of commerce can rival her," Zhao Xiaodao said smugly, as if it had anything to do with her.

"I think you could try reading this book," Ma Feifei said, handing it to Gongsun Qiong.

Gongsun Qiong took the book, looked at the title, and couldn't help but read it aloud, "The Nine Chapters on the Mathematical Art?"

Ma Feifei looked at the book in Gongsun Qiong's hand and said, "This contains an extremely profound method of arithmetic. If you can comprehend it, it should be of some help to you in arithmetic."

This is truly remarkable; it is the first mathematical treatise in ancient China, the most important of the "Ten Mathematical Classics," completed around the first century AD. The book is incredibly rich in content, systematically summarizing the mathematical achievements of the Warring States, Qin, and Han dynasties. Furthermore, it boasts unique contributions to mathematics, not only being the first to mention fractions but also the first to record problems of excess and deficiency. Its chapter on equations also provides the first explanation of negative numbers and their addition and subtraction rules in the history of world mathematics. It was the most concise and effective applied mathematics in the world at the time, and its emergence marked the formation of a complete system of ancient Chinese mathematics.

"There really is such a book?" Gongsun Qiong asked, somewhat surprised.

Ma Feifei awkwardly touched his nose. It was the first time he had ever discovered that Bookstore actually had such profitable books. It seemed that he didn't know enough about Bookstore!

"Then let me read this one." Gongsun Qiong was clearly interested in books about arithmetic, and pulled Zhao Xiaodao toward the private room, ready to take a look.

"I'll browse through all the books on the shelf later and see if there are any other books with different benefits." Watching the two people carrying books into the private room, Ma Feifei returned to the cashier and thought to herself.

"But before that, let's copy down the books that will be awarded as prizes." Shaking his head, Ma Feifei picked up his pen and sighed.

The number of books in my head is increasing, and I haven't even had time to copy the few remaining ones. Yesterday, the system rewarded me with a Yellow Quality copy of "The Art of War," which means that copying that "Pokémon" book before was a waste, and everything is back to square one.

However, speaking of the reward of "The Art of War," we must also mention the newly released Side Quest— "Transcendent to Saint."

Transcendent to Saint- Task Details: Purchase an Epic-grade- quality book from the System Shop and use it to help a fellow reader reach the realm of Spirit Saint.

Task duration: one year.

Quest Reward: The A Saint's Following.