Yesterday, he irresponsibly threw the unary equation to Lu Sanlang to talk about, and that afternoon, Zhang Shou directly threw out the two-dimensional equation. With such a Scud-like progress, he would be sprayed to death by countless educators in the next life, but now he has no burden in the face of a group of students who are at least sixteen years old and nearly forty years old.

They are all adults who have gone through the baptism of nine chapters of arithmetic, and what primary school students have mastered in half a month and a month, I will spend half a day telling you, and if you can't understand it, you are stupid!

He did not simply talk about theory, but the chickens and rabbits in the same cage, the last time Wang Jie in the Shuntianfu test out of the long rope depth measurement, with the bowl of monks and other problems as examples, fully demonstrated to the students the flexible use of binary equations in practical problems.

Sure enough, when these students found that all kinds of problems that were once thought to be difficult can be solved so easily by just making an equation, they were all very excited. However, when Zhang Shou was about to end the two classes, he suddenly assigned a completely unrelated homework.

"Among you, there may be four books and five classics that you are not familiar with, but you should have read all the thousand-character texts of enlightenment, and you should have read a lot of Tang and Song poems and Han Yuefu. When you go back, you recall what you have learned, see which poems and songs have sentences that are all from the thousand-character text, and then write them. This assignment is limited to five days, and you can turn it in at any time within five days. ”

Other prisoners only thought that Zhang Shou was on a whim, and the purpose was to let them review those poems and songs while practicing the Sutra, but Lu Saburo didn't think so at all.

The purpose of Zhang Kang's invitation the night before yesterday, Zhang Shou didn't tell him afterwards, but he and Zhang Kang have known each other for a long time, and since he returned to Beijing, he was praised by the emperor for his talent in arithmetic, and Zhang Kang asked him to try to open the secret box.

As a result, Lu Saburo rightfully failed. I don't even have any clues or clues, what a ghost......

Therefore, when he followed Zhang Shou back to the house, he couldn't help but ask curiously: "Mr. Xiao, doesn't he already have a clue about the fourteen-ring key?" ”

"Oh, you tried it too?" Zhang Shou asked with a smile, and when Lu Sanlang said awkwardly that he had no clue, he shrugged his shoulders and said, "How can I have a clue, it's just that a dead horse is a live horse doctor, first try to see how many predecessors' poems and sentences can be combined into the thousand words in the thousand-character text." Then I used the same algorithm that Wang Dayin used to solve the secret letter from me before to try my luck. ”

Speaking of this, he shrugged his shoulders and said, "Okay, I can't help it." ”

Lu Sanlang was stunned for a moment, then slapped his thigh and said, "Why didn't I think that this is indeed a solution!" Mr. Xiao, you said it earlier, let's see which words in the poems are from the thousand-character text, Wei Nanbo has already asked people to do this, but because it doesn't match the fifty-six words, he will put it aside. Wait, I'll go to him and bring you the transcripts of those verses!" ”

Seeing that after saying this, Lu Sanlang was about to run, Zhang Shou's heart moved, and he suddenly reached out and clasped his shoulder.

The total number of Chinese characters is in the tens of thousands, and the number of commonly used Chinese characters is 3,500 in later generations, but some statistics say that in daily data, 98 percent are the most commonly used 1,000 characters, and 99 percent are the commonly used 2,500 characters.

The thousand-character text is also a thousand words, but there are many rare words in it, and the coverage is not so wide, and it should be no problem to find dozens or even hundreds of sentences from ancient and modern verses. Of course, there are no commonly used words in poems and songs such as double, ruo, single, ya, bei, yan, etc., which will definitely reduce the number of verses that meet the requirements.

But in any case, let his students immediately sort out which poems are completely written in the words of the thousand-character text, even if they rack their brains, they will naturally not be able to match the unremitting efforts of Wei Nanbo Zhang Kang, a person who pursues the secret of the secret box, for decades. However, the Jiuzhangtang people are powerful and powerful, and they may not be able to use them to do this.

Such a thought turned between the lightning and flint in his mind, and Zhang Shou smiled when he saw Lu Sanlang looking at him suspiciously.

"Since you have gone to see Wei Nanbo, then ask him for me if this matter he asked me can be regarded as a subject and provided to the students of Jiuzhangtang. My ability alone is limited, and I can't do what Master Ge and other grandmasters can't do, but there are many people involved, and I may have some ideas. ”

Lu Sanlang opened his mouth, and wanted to ask those students who even had to spend a little effort to understand and comprehend the equation what they could do to help Zhang Shou, but in an instant, he understood what Zhang Shou meant.

If nothing else, these people may be able to find verses that Zhang Kang did not find before; What's more, the words in these poems correspond to the first few words in the thousand-character text, which also needs to be sorted out by hand, and he is not willing to count them word by word! Of course, the most important thing is that even the most stupid person may sometimes find an idea that smart people don't think of.

Of course, the premise is that the ciphertext is really related to the poetry and song of the fourteen characters, not a casual sentence......

He immediately held his head high and said, "I know, let's go!" Don't worry, little sir, if Wei Nanbo doesn't agree, let's fool him casually, anyway, this is his ordnance bureau's business, and it has nothing to do with us! ”

Of course, Zhang Shou praised Lu Sanlang's vigorous and resolute energy, nodded and signaled people to hurry up. An hour later, he saw Lu Sanlang's eyebrows fluttering and he pushed the door in and rushed in, and presented more than a dozen pieces of paper directly.

"I said, go to Wei Nanbo and ask for these things, he must have them. After discovering that all the characters of the Fourteen Rings were from the thousand-character text, he urgently ordered thirty or forty cronies under his command to rummage through the poems found in the poetry collection, and it took more than half a month! Of course, it can't be said that there are no omissions, but those famous poetry collections should have been found, and the next step has not yet been calculated. ”

"Also, Mr. Xiao, what you said before, take this as a topic, Wei Nanbo also carefully considered it, and was a little hesitant at first, but after thinking about it, he seemed to have figured it out, and said that he was willing to give it a try. Anyway, once the box is opened, it is said that you can reset the new key, so you don't have to worry about not being able to use it in the future. ”

That box actually has the function of resetting the password? It's advanced!

Zhang Shou thought so in his heart, so he had to take the paper and start looking down. After just a sweep, he found that probably because all fourteen words were from the thousand-character poem was not so easy to find, so he retreated to the second, and even counted the poems and songs that matched the seven characters.

For example, the water of the Yellow River came from the sky. The first sentence of the next sentence is not in the thousand-word text, and the next sentence is not included.

For example, in ancient times, everything flowed in vain, and the same is true of the world's pleasures in the previous sentence, and if there is no word in the second sentence, the previous sentence is not included.

For example, I wish to shine on you month by month, and the previous sentence did not have the word "Wang" at this time, and the previous sentence was not included.

Looking at the poems on those few sheets of paper, there are very few fourteen words that match all of them, and even five-character poems, or those words that do not correspond strictly to quatrains and rhythmic poems, are quite a lot, and it is obvious that Zhang Kang's people have not used their brains and effort.

And Lu Saburo also explained beside him: "As for the fifty-six words on the lock, there is nothing that can form a verse." ”

Zhang Shou nodded, and after a cursory look, he said to Lu Sanlang: "Early tomorrow morning, you will see if anyone has handed in their homework in Jiuzhangtang, if the poems that are different from this one will be included, and the same ones will not be bothered." Then, you said that this was to help the Ordnance Bureau solve a difficult problem, and let them pick out the numbers represented by each word in these verses in the thousand-character text......"

Lu Saburo nodded while listening, and finally went out majestically. However, Lu Saburo, who is the smartest person, did not eat alone. Now it is he, the head of the fast, who is responsible for presiding over the morning class, and Qi Liang is responsible for finding people to talk to one by one in his spare time to understand his personal situation and personality. So for such a big task, of course he would not leave Qi Liang.

As for Zhang Shou himself, after Lu Saburo left, he spread out the paper on his desk, patiently replaced the fifty-six characters on the fourteen-ring text code lock with the corresponding numbers, and then thoughtfully tapped his fingers on his nails.

"Instead of simply substituting the calculation, why not talk about functions by the way? If it's a linear function, then draw a plane Cartesian coordinate system and substitute the numbers before and after? In this way, you can also talk about analytic geometry by the way, which is clear at a glance...... Well, it's just ahead of its time, and it's a waste of paper ......"

When Zhang Shou was about to use the large number of people in the Jiuzhang Hall to start a decryption battle, the urgent report of Zhang Kang, the uncle of Weinan, was also sent to the emperor's desk. For the box that has lost the key since the reign of Emperor Ruizong and can no longer be opened, the emperor is not as persistent as Zhang Kang, but he is inevitably curious, so he is not annoyed by Zhang Kang's practice of cutting first and then playing.

"Jiuzhangtang has only been in class for a few days, and Zhang Shou actually used the fact that Zhang Kang asked him to help make a big problem, this kid is interesting." The emperor stood up and turned a blind eye to the big flicker sent by Chu Kuan, and actually paced two steps in the room with his hands in his hands, "I heard that the second child went to see Zhang Kang?" Does he know about it? ”

"It should ...... Don't know, right? Chu Kuan tried his best to make his answer look uncertain, and then said cautiously, "After all, the second prince is the one who went to see Wei Nanbo in the morning before yesterday. It was just staggered from Wei Nanbo's two meetings with Zhang Shou before, and the time when Lu Sanlang was looking for him to see him today......"

"Alright, no need to say it." The emperor interrupted Chu Kuan's words, and said a little lazily, "The eldest and the second have been fighting non-stop since they were children, and now that they are older, it is not surprising that they have other thoughts." The boss at least knew a little moderation, and he was looking for a noble like Zhang Chuan, the Duke of Qin, who repaired books and read books and didn't ask about state affairs, and the second dared to directly stretch out his hand to the Ordnance Bureau. ”

Chu Kuan wanted to say that they probably also wanted you to see your ability, but when the words came to his lips, he didn't dare to say anything more when he saw the emperor's face sneering. Especially when he saw the emperor suddenly striding out, he was originally going to serve the emperor to go to the queen mother of Qingning Palace, and he hurriedly chased after him, and he caught up with the emperor in front of the main hall and put on a thick fox fur for him.

"You are the master of ceremonies, not the steward of the Qianqing Palace, so you don't need to go around me all day long." The emperor put down this sentence without looking back, Chu Kuan was in a dilemma, but after seeing the emperor walk out for more than a dozen steps, he still caught up again.

Sure enough, the emperor never drove him away again, even after entering Qingning Palace. When he saw that the emperor saluted a little carelessly and asked the queen mother for goodnight, and was about to retire after sitting for a while, he just breathed a sigh of relief, but saw that the emperor who had just left his seat suddenly threw out two questions with a smile.

"I heard that the queen mother praised Zhang Shou in front of the eldest and second children? Interesting? ”