Qing'er gently flicked the hollow beads that could move up and down, and her eyes were also full of doubts, Rao is talented and well-read, and she didn't know what kind of appliance this was.

"The name of this thing is 'abacus,' and it is...... It's a special calculation tool for me. Zhang Zixing, who has been accustomed to "plagiarism" career, didn't even blush when he lied, "Now the title of the book "Heavenly Calculation" moves the world, and everyone's arithmetic ability is also improving, but it is really inconvenient to use the calculation chip as a calculation tool, so I have been thinking hard for many years, and I finally created this thing, and I dare not hide it, so I came to share it with Miss." ”

Historically, before the invention of the abacus, people have been using small wooden sticks to calculate, these small wooden sticks are called "calculation chips", and the calculation carried out with calculation chips as a tool is called "calculation", which is also based on the "Nine Chapters of Arithmetic" The calculation tools recorded in the "Heavenly Calculation", now with the popularization of arithmetic, people's computing ability is gradually improving, and the calculation chips can no longer meet the needs, so Zhang Zixing timely launched the abacus this "advance product". (There is also a legend that it was invented by the Yellow Emperor's subordinates, which is ignored here.) ）

Under the curious gaze of Qing'er and Deng Chanyu, Zhang Zixing explained the concept, formula and usage of abacus while demonstrating. As soon as Qing'er heard that this abacus was a new calculation tool that Mr. Zixing had invented after many years of hard thinking, her expression immediately became serious, and she listened attentively to his explanation, for fear of missing a word. Although Deng Chanyu is not as studious and talented as Qing'er, he also has a certain arithmetic ability, and he is especially interested in this new thing, so he also listens quite attentively.

Zhang Zixing finished saying the abacus formula, Deng Chanyu grabbed the abacus and began to work with the mantra of memory, which corroborated with ordinary arithmetic, and with the success of the attempt, the surprise on his face became stronger: "Seven plus three, seven two plus six...... I got it!"

Qing'er's mathematical knowledge is much better than Deng Chanyu's, and her understanding of the abacus is also deeper, so she naturally wants to do it, but unfortunately there is only one pair of abacus, and it is not easy to compete with Deng Chanyu, so her eyes can't help but dim. Zhang Zixing knew her mood, and while explaining the abacus knowledge in detail, she promised to make a few more abacus tomorrow and send them over, so that her mood improved.

"Little thief, my sister is right, I can't see that you are really a little talented. Deng Chanyu was a little addicted to playing, and her impression of Zhang Zixing gradually improved, judging from her expression, "a little talented" is already a very high evaluation for someone.

Qing'er understood the great significance of the advent of the abacus, stood up solemnly, and gave a big salute to Zhang Zixing: "This thing made by Mr. can be simplified, greatly improving the speed and accuracy of calculation, it is of great significance, it can be said to carry forward the past and forge ahead into the future, Qing'er has thanked all the colleagues who study arithmetic on behalf of the world, Mr."

Zhang Zixing hurriedly returned the salute: "I heard that Miss's father has an old relationship with the officials of the court and China, can you ask Miss Lingzun to dedicate this thing to the court, so that the abacus can quickly spread to the world and make the best use of it." ”

Qing'er showed surprise on her face: "Mr. has this intention, Qing'er should do his best, when today's son is a wise sage, he naturally understands the importance of abacus, and there will be a reward at that time, Qing'er congratulates Mr. in advance." ”

Zhang Zixing shook his head and said something that surprised the two girls: "I ask Miss Lingzun to transfer the abacus to the imperial court, and there is only one condition, that is, it must not be revealed that this abacus was invented by me......"

"Why? This is a good opportunity!" Even Deng Chanyu felt incredible, when she came a few days ago, she heard Qing'er talk about Mr. Zixing's identity as a "declining nobleman": "I thought you were a talented thief, but you were a stupid person, if you can be appreciated by the Son of Heaven, you can revive your family business and enjoy prosperity and wealth, why do you want to do this?"

"Wealth, fame and fortune are just passing by, how can that kind of intrigue and walking on thin ice be as comfortable as the idle clouds and wild cranes?" Zhang Zixing smiled at Deng Chanyu, revealing an indifferent expression, Deng Chanyu's eyes flickered, and he didn't say anything sarcastic.

Zhang Zixing suddenly remembered that many immortals in the Romance of the Gods seemed to like to compose songs when they appeared or started fighting, so he pulled out a passage from the Tang Dynasty poet Meng Jiao's "Hermit" in the superbrain database. Someone took a deep breath, his eyes were far away from the sky, a quiet smile appeared on his face, and he looked a little out of the dust, and whispered: "Listen to me compose a song: Baoyu is not out of the pur, and the first is the dust." The pine and cypress are out of the mountain, and the first salary is to go out of the mountain. The gentleman hides the stone wall, and the Taoist book is my neighbor. Sleep and think about its meaning, and the taste of the park is true. ”

When he finished reading the plagiarized verse very carefully, the corner of his eye secretly glanced at the two women, and sure enough, he saw the admiration in their eyes, even Deng Chanyu, and couldn't help but be very proud.

Meng Jiao's "Hermit" is really extraordinary, and the two young ladies were immediately impressed by the literary brilliance and integrity of this Mr. Zixing, especially Deng Chanyu's impression of him has changed greatly.

Since Qing'er's last suggestion to recommend Zhang Zixing as an official was rejected, she already knew that this wizard was a master who was "indifferent to fame and fortune", so she did not persuade him much on this issue: "Mr. is a high-ranking hermit, Qing'er admires it, but after offering the abacus, the court will definitely ask about the source of this thing, why should Qing'er be right? Why don't I introduce my father to Mr., and let my father decide?"

Seeing your father? Your father is the first minister under the Bensan people, unless you learn to veil yourself, otherwise the identity will not be put on immediately?" Zhang Zixing hurriedly refused: "This fact is easy, Miss Qing'er said that the abacus was made by you......

"How can this be done!" Qing'er immediately understood what he meant, and categorically refused: "Sir, do you have to trap Qing'er for injustice? Although Qing'er is not talented, she can't do such a shameless thing!"

"Alas, Miss Qing'er, can't bear to let this abacus be lost? Zhang Zixing deliberately made an angry appearance, picked up the abacus, and was about to fall.

"Wait!" As Zhang Zixing expected, Qing'er and Deng Chanyu spoke out almost at the same time to stop it.

Qing'er stared at Zhang Zixing and said slowly: "Mr. has taught Qing'er the mystery of abacus, even if he destroys this abacus, Qing'er will remake it according to his memory." The abacus is of great significance to the arithmetic, Qing'er can't bear the secret torment in her heart, and the abacus will come out sooner or later. Alas, what a good scheming sir!"

Zhang Zixing couldn't help but admire Qing'er's quick mind, he can be said to be the person with the highest IQ he has seen since he came to the Shang Dynasty, even if he has a seven-trick exquisite heart, compared with it, he is slightly inferior, such a woman is also his confidante, can he watch her be silent for a lifetime as an accessory of a man like an ordinary woman in the future?

"Miss Mingjian, Zixing made an abacus, not for fame and fortune, but for the development of arithmetic, in the next Miss will be introduced as a bosom friend, knowing that Miss is a person, forced to make this decision, let Miss be embarrassed, in the next compartment first ask for guilt. Zhang Zixing said with a guilty face, but in his heart he felt that his acting skills were becoming more and more outstanding, and he almost really devoted himself to the role of a master who regarded wealth and wealth as a floating cloud - if he could devote himself to the entertainment industry now, he would be able to become an actor.

Qing'er sighed and didn't say anything more, Zhang Zixing heard the melancholy in her sigh, and no longer forced each other, just chattered idly from all over the world. Qing'er knew that he wanted to divert the topic, but she still cooperated with her from time to time to avoid embarrassment, and Zhang Zixing secretly praised it while also making an important decision in her heart.

Deng Chanyu chatted with Zhang Zixing for the first time, but he didn't expect that the knowledge of this "disciple" was really as extensive as Qing'er said, and there were more words in his mouth, and the questions were one after another, even more bizarre and bizarre than Qing'er, it was like a famous preschool education book in the 21st century "One Hundred Thousand Whys", fortunately, there was a super-brain database, combined with the cognitive level of the Shang Dynasty, he finally parried Deng Chanyu's continuous questions like a machine gun, and he breathed a sigh of relief, it seems that this Miss Yu is really a "problem" girl.

Zhang Zixing also discovered an interesting phenomenon, judging from the questions raised by Deng Chanyu, her way of thinking is very unique, daring to ask many questions that challenge the authority of existing knowledge. But her purpose is only to get the answer or enjoy the fun of the question and answer, the right or wrong or the meaning of the answer itself is not too deep, and Qing'er is different, for many answers are carefully considered, and what she has learned in her heart is confirmed, and constantly absorb new knowledge, it can be said that although the question was raised by Deng Chanyu, it was Qing'er who benefited the most.

"Even my master can't answer Miss Ben's questions so continuously, and your answers are much more interesting than Shizun's...... You're got what you can do, thief. Deng Chanyu nodded with satisfaction like a teacher who tested his disciples, and directly raised his level of "a little talent" to "capable": "In this case, even if Miss Ben and your festival are really written off, I will not trouble you again." ”

"Really" a write-off?feelings, this girl began to promise Qing'er to give up revenge, it is yang and yin, and she wants to put five-color stones to sneak attack when Qing'er is no longer there...... Thinking of this, Zhang Zixing couldn't help but feel a chill in his heart, thinking of a certain Internet famous sentence in later generations, "No matter how poor you are, you can't be poor in education, and you can't mess with evil women" - it is really a golden rule.

"Little thief, what is the matter with Sister Fang mentioning that you failed to refine your magic weapon, you actually know how to refine magic weapons?" As soon as the magic weapon was mentioned, Deng Chanyu's curiosity surged up again.

Of course, Zhang Zixing couldn't tell the truth, but he just made up a half-truth and half-truth, saying that according to the fragments of ancient books, he used the power of heavenly thunder to turn sand and stone into crystal, but because the container in his hand could not store too many heavenly thunder, he failed repeatedly.

"Little thief, what did you just say...... Can sand stone turn into crystal?" Deng Chanyu's apricot eyes suddenly widened, for her, crystal stone is by no means a kind of ornament or treasure, and its important surname is far beyond the imagination of ordinary people.

"Yes, it's a pity that the ancient book is incomplete, and I can only figure out a little bit of the way through trial and error, but that day the thunder is too difficult to collect, not only is it very dangerous, but also the weather is limited, so the progress is very slow. ”

"'A little way'? Could it be that you can already make crystals?" Deng Chanyu heard the clue in his words, and immediately asked.

Zhang Zixing saw that Deng Chanyu seemed to be quite concerned about the manufacture of crystals, and suddenly thought of the five-light crystal she used to hurt Jiang Wenhuan last time, and seemed to have an understanding in her heart, and replied: "Yes, it's a pity that just made a little bit, and the power of heavenly thunder has been used up......"

Deng Chanyu frowned and said, "What kind of container do you use to collect heavenly thunder? Is it an ordinary jade bottle? It's really stupid! Why don't you use the Gathering Thunder Bottle?"

Is there such a container that can meet the conditions for accumulating electricity? Zhang Zixing's eyes suddenly widened.

(There is another chapter in the afternoon)

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