The girl yearns for this unknown world of arithmetic, she has received a good education since she was a child, but as a woman, she is destined to not be able to participate in the imperial examination to gain fame, so she does not spend too much time to learn the Four Books and Five Classics. On the contrary, her interests are in arithmetic, medicine, piano, chess, calligraphy and painting. "Mathematics" is also one of the six arts of a gentleman, and mathematics is also respected by scholars, but in the social environment where the imperial examination is supreme, no one is willing to work it.

The girl had been studying with a master of arithmetic since she was a child, and until she had come to the blue, she could hardly find a person to communicate with in this respect. And after learning the ten books of arithmetic, mathematics seems to have reached the top, and there is no way to continue.

Until this moment, Li Hao showed a broader sky in mathematics, and the girl yearned for it, if Li Hao was not a young man, she would want to learn art on the spot.

The girl stood up, blessed Li Haoying, and said: "In Li Gongzi's eyes, the problem of chickens and rabbits in the same cage is indeed the foundation, and what Li Gongzi said before is indeed not arrogant, but a fact. The little girl lost, and she was willing to copy a poem for her son as agreed before, but she didn't know which poem the son liked. ”

Li Hao looked at the girl with a smile, "Just write a poem "Drumming" in "The Book of Songs: Shao Feng". ”

"Okay, I'll write to you...... Yes? "Wind and Drumming"? The girl's pretty face turned red all of a sudden, "You...... Bummer! After saying that, he turned around angrily and walked away like a gust of wind, only to hear the sound of fast and rhythmic footsteps coming from the wooden staircase.

"This girl's paper is kind of interesting!" Li Hao looked at the girl's back and said to himself, "Just kidding, don't be so serious." The sister of the Northern Song Dynasty is too thin-skinned, maybe I'm too much? ”

"Ding Fu," Li Hao called the housekeeper and asked, "I just saw the Mo family's carriage parked outside the store, was that little lady from the Mo family just now?" ”

"The old slave doesn't know, I heard that Mo Shouyi has a daughter, but I don't know if it's the little lady just now."

"You send a clever guy to take a look, and be careful not to let her find out."

Ding Fu immediately arranged for a guy to go out, and soon came back to confirm that the little girl had gotten into the Mo family's carriage.

Li Hao touched his chin and thought to himself, "No, it's really such a coincidence?" This sister paper is Mo Fan's sister? Although Mo Fan is dumbfounded, he looks quite talented, and it is not surprising to have such a beautiful sister. ”

Li Hao had already realized that his joke was a bit too much, after all, the social atmosphere of the Song Dynasty was too far from the main world, far less open than the main world. In the Overworld, it's normal for boys and girls to make jokes about each other, and it's too abrupt to make fun of love poems when they first meet here.

"Lao Ding, I'm going home, you go to Cui Jiya to talk to the shopkeeper Cui and rent that shop. It's best to talk about less rent, and it's okay to talk about a lot. Sign your lease today. "Li Hao came out this time mainly to choose a location for the photo studio, and now that the shop of the photo studio has been determined, he can go home.

Some trivial things can be handed over to the housekeeper Ding Fu to do, if you do everything yourself, where is the time to cultivate the Force? Which is more important, earning money or cultivating the Force? The success of the Force is the goal of his life. After the business gradually grows, we must slowly learn to delegate power.

After returning home by carriage, Li Hao went directly back to the backyard.

Two sets of solar home power generation systems brought from the Overworld, one of which has been installed, and Li Hao's master bedroom has been electrified. As a student of the Department of Electronic Engineering at Polytechnic University, it was too easy to install wires.

The wires pulled out by the power generation system lead to his study and to a workshop in the courtyard of the house. A complete set of laser printing equipment in the workshop has been plugged in, and a row of sockets has been left to charge the batteries of the digital cameras.

As long as the photo studio is renovated, the photos taken after the opening will be taken back here for printing. The guys prepared to train a dozen, six for photography, three for printing and embossing, and the others received guests in the photo studio, bringing back the camera's memory card for printing every day.

In addition, Li Hao also promoted a guy named Hong Dashi from the Treasure Pavilion, and asked him to specialize in managing the photo studio. This Hong Dashi is twenty-seven or eighteen years old, and in the previous performance appraisal, he had the highest sales volume and was promoted to the leader of a sales group. According to recent statistics, the sales volume of his group has risen rapidly to the first place, and it seems that he has a certain management ability.

After having a long talk with him, Li Hao felt that he had a more flexible brain, was also diligent, and had some ability, so he tried him for a while, and if it was not bad, he would let him be the shopkeeper of the photo studio in the future.

Li Hao returned to the backyard study, if a Song man saw the furnishings in his study, he must be very surprised, because there were many things they had never seen before.

There is a thin laptop computer on the bookcase in the middle of the study, and two printers next to it, a color inkjet printer, can type pictures; A laser printer with extremely fast printing speeds.

Next to the laptop was a pen holder filled with pens, pencils, pens, a file box, several folders, a sticky notepad, and a thick stack of A4 paper. In addition, staplers, rulers, paper clips, swastika clips, glue, scissors, ...... All kinds of stationery are placed in an orderly manner. It's almost a move of the Overworld's desk.

Li Hao sat down in front of the computer, he had a little appreciation for the girl he met in the Treasure Pavilion just now, and he had lived in the Song Dynasty for a long time, and it was the first time he had met such a temperamental beauty. Recalling her shocked and adoring gaze, Li Hao felt a little funny, so he gave a small gift to make you even more shocked, and also expressed his apologies by the way.

After starting the computer, Li Hao thought about it and opened the folder with the name of "Books", which was filled with rows of dense book titles. It was downloaded from a forum and posted by a poster who advertised "all the famous works of ancient and modern China and foreign countries". Books such as "The Wealth of Nations", "Mathematical Principles of Natural Philosophy", "Heavenly Creations", and "Compendium of Materia Medica" were exhausted.

In the search box, I entered the word "geometric original", and a little search came out, and a word file immediately came out. Skillfully opened and converted to traditional Chinese, Li Hao "printed" with a light click.

The laser printer immediately emits a slight humming sound, quickly spitting out sheets of printed A4 paper.

Finally, I entered the four words "geometric original" in large font, and then added a row of five small characters "by Euclid", and after thinking about it, I entered the words "Gift to Quanzhou Mo Family" at the top. This page is printed out as a cover.

After looking through it for a while, I added some explanations of mathematical symbols in front of the document, as well as the comparison of Arabic numerals with Chinese numerals. Then print out the page and put it under the cover.

Li Hao doesn't have a binding tool like a hot melt machine, but he doesn't need to be so advanced, he drilled a few holes in this stack of paper, and it became a book with a thick thread.

In this way, a freshly baked "Geometric Original" was placed on the bookcase.

The book is the world's best-known, most complete, and most widely circulated mathematical work, and is said to be second only to the Bible in circulation. According to the historical trajectory of the main world, the book did not begin to be introduced to China until the end of the Ming Dynasty, when the famous scientist Xu Guangqi met the Italian missionary Matteo Ricci, and the two translated it together. Unfortunately, only a part of it was translated, and it took another two hundred years for this mathematical masterpiece to finally appear in its entirety in China.

In other words, this mathematical masterpiece written by Euclid in 300 BC did not have a complete Chinese translation until 1857 AD.

If the Geometry Primitives were to spread at this moment, it would be about six hundred years ahead of the history of the Overworld. The development of ancient Chinese mathematics to the Song Dynasty has long been a lot of special mathematical works, such as "Zhou Ji Sutra", "Nine Chapters of Arithmetic", "Sun Tzu Sutra of Arithmetic" and so on, but these books are really not as good as "Geometric Original" for the development of mathematics.

Li Hao took the book to the front yard, found a long-term worker, and asked him to send the book to Mo Mansion and hand it over to Mo Fan himself.

For the task personally assigned by the young master, how dare the long-term worker slack off? More than half an hour later, Mo Fan took over the "Geometric Original" from the hand of the long worker.

Mo Fan flipped through the book, and he was very shocked, every time he saw something in the Treasure Pavilion, he was shocked, and it was almost a habit. He wasn't shocked by the contents of the book, he took a cursory look and knew that it was a mathematical book, and he didn't study much about it. He was amazed at how small and clear the printed font was.

If this printing technology is used, the thickness of the Four Books and Five Classics will be reduced by more than four-fifths, saving a lot of paper. He touched the paper again, and it was thick and tough, which was very different from the paper on the market.

Mo Fan longed for the country established by the descendants of Luban in Li Hao's mouth, and it was indeed a place where skilled craftsmen gathered, and every item was so magical.

He took the book and walked to the small building where his sister lived.

Mo Fan's sister Mo Shiyun was sitting in the gazebo in the backyard garden, and her personal maid persuaded: "Are you still angry with that person?" Forget it, I can't be angry with that kind of scoundrel, and I'm sorry for being angry. ”

Mo Shiyun shook his head slightly and said, "I'm not angry, I'm thinking about how to learn arithmetic from him, by the way, he calls arithmetic mathematics." Well, number is one of the six arts of a gentleman, and the knowledge of mathematics and mathematics is a very atmospheric title. ”

The maidservant was anxious: "He is angry with you like that, and your character is so inferior, why do you still want to learn from him?" ”

"His character is indeed very poor, but his knowledge is not bad at all, he is simply too profound, and he can be regarded as a generation of grandmasters in mathematics. The hateful thing is that he asked me to copy "Drumming", and I will avoid him when I see him in the future. ”

The maidservant frowned and said, "Which poem is "Drumming"?" ”

"One of the poems in the wind of poetry, there are two sentences in it, 'Death and life are broad, and Zicheng said. Hold the hand of the son, and grow old with the son. If I had copied these two verses to him, would I still have the face to see people in the future?' It's so hateful! Speaking of this, Mo Shiyun's pretty face turned red again.

At this time, Mo Fan's voice came from afar, "Little sister, it turns out that you are here, so I have been looking for it for a long time." ”

"Brother, why are you here! Aren't you going to study in your study at this time? ”