To Ye Chang's surprise, this question only stumped Zhang Xiu for a while, and then he took out some bamboo sticks from his bag, divided five by two, and reported the accurate answer.

Ye Chang was surprised.

Looking at Zhang Xiu's gaze again, it was a little different.

The chickens and rabbits in the same cage is only preliminary, but this water irrigation question is much more difficult. In this era, anyone who can make this kind of problem can definitely be called a mathematician.

What mathematicians were there in the Tang Dynasty?

At least in Ye Chang's memory, he couldn't think of any well-known mathematicians in the Tang Dynasty, let alone this Zhang Xiu...... Perhaps, in the midst of history, he died in obscurity, leaving no trace?

Since ancient times, there have been many wise men and sages in China, and only a few of them are known to future generations, and more of them have disappeared in the long river of history like ordinary people.

"Any more questions?" After completing this question, Zhang Xiu was eager to try: "Can it be more difficult?" ”

Ye Chang pondered for a while, then reported a set of numbers, and then in this group of numbers, a group was vacant.

This is a permutation and combination problem, and it is necessary to find the pattern of this series of numbers, and then deduce the vacant numbers according to this law.

As with the previous two questions, this question still tests logical thinking ability.

This time, Zhang Xiu pondered for a long time, and the calculation chips in his hand were also placed around for a while, but after the last, he still reported the correct number.

"Amazing, amazing" Jia Mao'er originally looked down on this skinny man, but at this time she couldn't help but give a thumbs up.

He is a discerning person, and it is obvious that Ye Chang intends to recruit this person, and since this is the case, he naturally wants to help from the side.

"Congratulations on the way of arithmetic, I'm afraid that except for Ye Langjun, no one can compare, tsk, amazing"

"Uncle Xian and Liang Gong are far better than so, they can not only calculate these, but they can also calculate the movement of the sun and the moon and the changes of the stars."

Zhang Xiu said this, Ye Chang just laughed at it, this was obviously boasting, but Jia Mao'er frowned over there.

Unlike Ye Chang, who has been in Chang'an for less than two months, Jia Mao'er has been in Chang'an City for more than 30 years, and many allusions are unknown to others, but he knows them.

"Wait a minute, you just said that your uncle is the Great Wisdom Zen Master, could it be that he is...... A line of divisions? ”

party

This name made Ye Chang shocked.

If it is said that among the astronomers of the Tang Dynasty, those who have left a great name in later generations are probably this monk and his party except for Li Chunfeng. It's just that Ye Chang was curious in his heart, and his line was the law name of this astronomer in the Tang Dynasty, that great wisdom...... And what is it?

"It's Uncle Xian."

"Dahui is a line?" This time, Ye Chang no longer concealed his surprise.

"One line is the name of the law, and Dahui is the pursuit of His Majesty." Jia Mao'er whispered: "That Liang Lingzan, I also remembered that he was once a member of the Jixian Palace, and he had the art of ingenuity with his own teachers."

Ye Chang also vaguely remembered at this time that his party had worked with a person named Liang Lingzan to build a water transportation armillary sphere, which was the oldest escapement

What the escapement means, others don't know, but Ye Chang is very clear: clocks

And the clock, in this era of relying on the hourglass to keep time, what will be the significance, what will be the significance of the great navigation career that Ye Chang wants to develop, and even what will be the significance of accurate military operations

Even if it is to make money, the watch industry will become a rolling source of money.

Unexpectedly, this skinny Zhang Xiu would be the nephew of the line

The party had passed away more than ten years ago, and he was only in his forties when he died, and Liang Lingzan, who collaborated with him, had already passed away, so for a while, Jia Maoer didn't want to come straight.

Asked about Zhang Xiu's identity, he is indeed the nephew of a layman, although Zhang Gongjin, the prince of Tan Guo, is the great-ancestor of the twenty-four heroes of Lingyan Pavilion, but in fact he is only the great-grandson of Zhang Gongjin. Their Zhang family, which has multiplied to this day, is still a eunuch of the Tang Dynasty, and it is also a custom at this time to cling to his family.

Zhang Xiu was a nephew of the Yixing family, and after the Yixing became famous in Chang'an by Li Longji, he followed the Yixing to act as a small novice. Influenced by Yixing, he was very fond of arithmetic and machinery, and after the death of Yixing, he followed Liang Lingzan. But after Liang Lingzan died again, he wandered and had nowhere to go, relying on the help of his clansmen to make a living, and studied arithmetic and calendars by himself.

"Where are the craftsmen who built the water transportation armillary sphere, the zodiacal travel instrument and many other utensils now?" Ye Chang suppressed the excitement in his heart and asked calmly.

Those people are the most valuable treasure of this era

In this era, those who can write poems and paintings are talents, but these talents can only create spiritual wealth, and they can indeed be immortal, but they are not of much help to the progress of the whole society. Of course, Ye Chang respected them, but if he wanted Ye Chang to choose, he would rather recruit more craftsmen to study machinery together.

"Most of the craftsmen are the ...... of the supervisors," Zhang Xiu's words disappointed Ye Chang.

"This will be the prison, what's going on?" With a glimmer of hope, Ye Chang asked Jia Mao'er. He knew that the Daoist would be the institution that managed the affairs of craftsmen, but some details still needed to be asked by the people of this era.

Jia Mao'er is familiar with Chang'an City, but he is familiar with this will be a prisoner, he said carefully, Ye Chang nodded again and again.

Originally, the Tang Dynasty General Supervisor and the Shaofu Supervisor were the two major institutions in the central government that managed craftsmen, and most of the sinners served as craftsmen, and the number of craftsmen under its jurisdiction was very large. There will be fifteen thousand craftsmen in prison, and 19,850 craftsmen in the young government, not counting the craftsmen controlled by the local state capitals. Moreover, the young government supervisors and general supervisors also specialized in cultivating new craftsmen. There is a clear time limit for each apprentice to complete his studies, and in his Six Codes, it is stipulated that an apprentice, with a length of four years and a minimum of forty days, must complete his studies or face punishment. Craftsmen such as gold, silver, copper, iron, chisels and hammers have a four-year apprenticeship because of the complexity of their work, while the work of weaving clothes and hats is nine months.

Ye Changzhi said that he belonged to the craftsmen who would be the prisoners and the young eunuchs, and it was impossible for him to have personal freedom. He wondered if it was through the eldest princess of Yuzhen to get a group of craftsmen, but immediately denied this idea: the eldest princess of Yuzhen also has selfish intentions, and the ball market is an example, through the craftsmen she gets, it is difficult to say who she is loyal to, maybe her new process will be researched, and the craftsman will be called away by the eldest princess of Yuzhen.

He didn't mind that the eldest princess of Yuzhen or the rest of the Li Tang clan would join him in starting a new industry—he also needed the industrial bourgeoisie to grow rapidly and replace the agricultural bourgeoisie to gain mainstream status. However, the premise is that the other party is tied to his interests, like these rangers brought by Jia Mao'er. Like the eldest princess of Yuzhen, the independence of interests is too great, and sometimes it will conflict with Ye Chang's interests, so until she has enough self-protection power, Ye Chang will not consider starting a new cooperation project with her.

"There's no way to invite it......" Thinking of this, Ye Chang scratched his head and sighed.

"If Ye Langjun wants to invite, it's not that there is no way." Zhang Xiu said suddenly.

"Huh?"

"At the beginning, the craftsmen who built the armillary sphere for water transportation were all inscribed on the armillary sphere and made great contributions, and later the saints granted amnesty twice, and their names were removed from the list of sins and listed as miscellaneous households."

Ye Chang was overjoyed when he heard this.

The household registration system of the Tang Dynasty is very particular, and you don't want to get out of the criminal register, but the miscellaneous households are different, although the miscellaneous households are also craftsmen and it is difficult to participate in the imperial examination, but at least they are hired by relocation, and they are not as troublesome as the criminal registration, and they do not need to go too deep through the official channels.

"Do you recognize them?"

"In the past two years, Liang Gong has died, and there have been fewer contacts, and in the past, when Liang Gong was still alive, he often went to see them."

Ye Chang was very satisfied, this Zhang Xiu was not only a research-oriented talent, but also had such connections among craftsmen

"I have a new book, you should read it first."

Ye Chang didn't say anything directly to Zhang Xiu, but summoned Chunming and asked him to go to his study to get a manuscript. After a while, Chunming ran over and handed the manuscript to Zhang Xiu.

Zhang Xiu opened it and saw that on the title page, there was a long text copied.

Qu Yuan's "Tianwen".

Although Zhang Xiu is not interested in poetry articles, he is very familiar with Qu Yuan's "Tianwen", and his clan uncle and his party have spent a lot of effort to answer the questions in "Tianwen".

Zhang Xiu glanced at Ye Chang in surprise, could it be ...... I don't know how many smart people's questions have been stumped, but Ye Chang actually has an answer?

Ye Chang smiled.

In another life, when he was teaching, he lived among the reckless mountains, and Qu Yuan's "Tianwen" and Liu Zongyuan's "Heavenly Pair" were also the articles he memorized when he was lonely.

Liu Zongyuan's era is not far from this time, Liu Zongyuan's heaven, if people who don't know see it, they will really think that it is shocking, and they will inevitably be punished by the government.

But although Liu Zongyuan was degraded, he had nothing to do with this "Heavenly Pair".

However, Ye Chang didn't take out this "Heavenly Pair" for the sake of safety, so when Zhang Xiu turned to the second side, it became something he was interested in.

"Hot and cold?"

The second page is about heat and cold, Ye Chang pointed out that furniture will deform in winter and summer according to the experience summarized by carpenters and others, which is the result of thermal expansion and contraction. Then he boldly proposed that there is not a vacuum around people, but there is qi, and the qi is swollen and lightened by heat, just like a boat floating in water, holding up the Kong Ming lantern. When the candle flame was extinguished in the air, the air became cold again, and the Kong Ming lantern fell.

"After saying goodbye to Chang'an, I remembered this question, guessed that this was the result, and then did several tests, which corroborated with this result." Ye Chang said again.

"Original...... It turns out that this is the truth, all around us, there is qi? Zhang Xiu thought for a while: "Indeed, there must be gas, we inhale, exhale, all are airflow, if the cloth bag is hollow, stuffed into the water, puncture a hole, there are bubbles overflowing." Also, the ball in the capital is also poured into the pig's urine bubble......"

In an instant, he was in a state of flux and began to mumble to himself again.

Ye Chang knew that he would sink into this book, which was originally a textbook he compiled to teach students some physics knowledge, as for Qu Yuan's "Tianwen", it was just to stimulate students' enthusiasm for exploring the unknown world. But I never thought that the manuscript of this textbook had not yet been compiled into a few pages before it had a reader.

"Brother Mao'er, I'm afraid I'm going to trouble you to go back to Chang'an." Ye Chang turned to Jia Mao'er: "Those craftsmen, as many people as they can invite, they will invite as many people as they can for me." If you can't invite yourself, your nephews, and apprentices can also be. As for wages, you can decide what you want within 100 years. ”

"Baiguan?" Jia Mao'er was surprised.

These craftsmen do things for the court, just get some rice and grain, and the wages are nothing, and they are doing some work on weekdays, and they are also exploited in many ways.

"Yes, you control the number, don't cause too much trouble, this matter needs to be kept secret." When Ye Chang said this, he glanced at Jia Mao'er.

Jia Mao'er understood and nodded.

Although those craftsmen became miscellaneous households after all, they were named after all, and they couldn't get out of Chang'an City when they were idle. Ye Chang's meaning was to let him use extraordinary means.

For tens of thousands of craftsmen, running away from a dozen or so is something that happens every year, and the court will not be too concerned about it. Among them, there are few illegal means such as bribery and private clearance, which is a familiar road for Jia Maoer.

"The placement ...... of these craftsmen" Ye Chang pondered for a while, these craftsmen could not be placed in Wolong Valley, firstly, there were many people staring at Wolong Valley, and secondly, because the space in Wolong Valley was small, and if they set up a school, there was really no vacant land for these craftsmen.

It seems that it is necessary to expand further into Busan.

Ye Chang is not very anxious about this, covering Busan is a branch of Taihang Mountain, Taihang Mountain once hid 100,000 bandits, even now, there are people outside the mountain, not far from Wolong Valley, another valley is opened, and a craftsman area is built. Then strictly guard, just train the children of the clan, so that they can learn to do something practical.

He had already had the idea of expanding Wolong Valley in his heart, so he thought of the location, which was about four miles away from Wolong Valley in another valley, which happened to be sandwiched between the mountains and Wu Zepi, with a lake on one side and a mountain on the other, and the traffic was very inconvenient.

Ye Chang was pondering these details, and suddenly, Zhang Xiu jumped over there, and his movements were even faster than that of the monk. He grabbed Ye Chang: "What about the back, what about the back, is there any?" ”

"Ahh

It turned out that the book that Ye Chang had compiled in the past few days was only a few pages, and Zhang Xiu read it quickly, and he couldn't stop it, so he naturally came up and grabbed Ye Chang and asked for an update.

Ye Chang was stunned, and then smiled.

The other party's expression made Ye Chang understand that this guy was on him and the boat.

Now that it's on, don't think about going down again.

Ye Chang was about to further leave this Zhang Xiu, but at this moment, he heard a commotion outside, and then saw a person and a horse galloping over.

Kunlun Nu chased after the man, although he was good at running, he couldn't run, but the distance was getting farther and farther.

The horse stopped with a sigh on Ye Chang's side, and the wax rod in Shanzhi's hand had already hit the passenger's face door quickly, the passenger turned over and dismounted, and then waved at Ye Chang, crying in his vocal cords: "Ye Langjun, help"