This summer, Huaiyuan is still good, because of the digging of the canal, although half of the canal opened in the west of the Han Canal has not yet been connected, but it has been diverted and diverted, in addition to irrigating the fields in Hexi, the drinking of people and animals and the processing of industrial production, it is enough.

Anyway, this work was handled by Li Simo, and the imperial court just sent Tai Shicheng over to calculate the earthwork manpower.

Later, Tai Shicheng, who was already old, resigned. When Li Chunfeng and the others were engaged in the work of revising the calendar, he resigned.

This old man who wrote "The Ancient Calculation", in addition to his own thoughts, Lu Yuanlang and Yu Shinan's recommendations are also important reasons.

What shocked Zhang De was that this old man not only knew cubic equations, but also had specific solutions......

The old man is a dick, in terms of applied mathematics, that's really ...... Simply so!

However, the biggest motivation for the old man to stay in Huaiyuan was to learn advanced mathematical methods from Zhang De, and then continue to compile books by himself.

The book that is absolutely awesome and does not explain the "Ancient Calculation Sutra" in the Chang'an arithmetic school, the old man just didn't write it.

"Mr. Wang, filial piety, it's time to eat."

Long live Wang Xiaotong as a bodyguard, life is easy, and everyone is surnamed Wang, maybe it was a family five hundred years ago?

"Hooray, help the old man go to the cafeteria to make a pot of rice."

"Sir, what would you like to eat?"

"Let's have some shrimp, if you have a sweet tooth......"

"There's a cake, and it's iced in an ice urn. It's a bit hot on this day, so it's good to eat some cold food to cool off. ”

"Okay, remember the bean soup."

"Hey."

Then the old man continued to bury himself in front of the table and play with rulers and diagrams, studying Ptolemy's theorem and the butterfly formula.

"Geometry is fun."

The old man looked up happily at the window, which was glassed and surrounded by lush elm trees. There are also two trees in the corner, one is a date tree. The other one is also a date tree.

"I only hate not being young in this life." Wang Xiaotong sighed with emotion, and then put away the stack of white paper that had been sorted out, "There is no end to it." ”

Wang Xiaotong has a lot of people, but the status of arithmetic in Zhenguan is not too high. Even if it is the imperial examination, it is also the choice of Jinshike. The household department engages in statistics, which all refers to making people work hard. Serious arithmetic has a high status. That is, between private businessmen. There are many enthusiasts like Zhang De, who are from an aristocratic background, and there are very few who are willing to develop and promote.

"Mr. Wang, I've brought it to you, while it's hot."

Wang Xiaotong changed the table to eat, and Wang Wansui stood there to help with chopsticks and spoons. Generally speaking, the scholars are silent about eating, but Wang Xiaotong said while eating: "Qi Nian, you should go to Peking University." ”

Wang Wansui looked embarrassed: "Filial piety." I practice martial arts with Uncle Tan. ”

"Your family has already glorified your ancestors, and you still need to kill the enemy and make meritorious contributions?" Wang Xiaotong pulled the rice, sandwiched a chopsticks of water celery, and ordered some vinegar on it, which was extremely appetizing.

"Uncle Tan said: perseverance, lame turtle thousands of miles. Since I am diligent in cultivating martial arts, how can I just waste it? ”

"That's what Xunzi said."

Wang Xiaotong glared at him, and then said sincerely. "Peking University is a good school, you don't go. It's a pity. ”

"Hehe, it's okay, it's okay, I often go to Peking University's Tsinghua Pool to take a bath, but it's comfortable."

“……”

Old man Wang was speechless, so he had to continue to cook and eat a piece of cake after the meal. Drank some bean soup. Only then did he sit down and rest: "In a few days, the old man will go to Hebei." If you want to find a place in Hebei to make a pottery workshop, the old man went to Hebei to investigate, do you want to go with me in the new year? ”

"Go together, Hongshen Gong will be an official in Hebei Province. Just go check it out. Saying that, Wang Wansui touched his head and said shyly, "Last time, Hongshen Gong came to Huaiyuan, and after seeing Zhang Gong, he also told me that he wanted to help me find a few Khitan concubines......

Looking at Wang Wansui's yearning look, Wang Xiaotong was a little speechless. The charm of knowledge is not as big as that of women, which is simply unscientific.

Old man Wang is not alone, his protégés in Chang'an, as well as his former colleagues and friends, will go to Hebei together. One of them, the ancestor was actually the one who repaired the Zhaozhou Bridge......

After 1,500 years, these people who can solve the three-dimensional equation and repair the Zhaozhou Bridge are really dicks who have no friends. It's a pity that I was born in the wrong era.

In Lao Zhang's eyes, Wang Xiaotong is a computing expert in applied engineering, Zhang De's ontology is not civil engineering, he can only solve the optimization of tools or design new tools. Wang Xiaotong's application and calculation of digging ditches, building embankments and building cities has been immersed in it for decades and has his own set of skills.

After Lao Zhang relied on Arabic numerals and geometry to seduce him, Old Man Wang felt that he was simply an old and strong Lian Po, and he could still him for many years.

"Prince! Maharaja! ”

Wang Xiaotong was resting, and Zhang De's surprised voice came from outside.

"What's the good news?"

"Happy event, on the territory of Wusugu and Yisai, there is indeed an iron mine!"

"Oh? Gorou Shichiro they found it? ”

"Well, just south of the Hanhai, at the source of the Wangjian River, Jieli also used to take its ore back then, but the refining method is not correct, and it is all defective."

Wulang Qilang is Wang Xiaotong's two protégés, and he used to be a calculating official under Chang'an Ling, and later after Wang Xiaotong resigned Taishi Cheng's official position, they also followed the teacher to Huaiyuan.

"Hmm...... The old man remembers that Turkic iron ore can make sulfur. ”

"Yes, it can be made!"

Zhang De laughed, high-fived and said, "This thing is really what I urgently need." ”

"It's just that it costs a lot, and the grassland land is not as convenient as Middle Earth."

"It's okay, I want to build the source of the river, and I want to set up a governor's mansion all the way. The new governor is the uncle, and it is very convenient! "Niu Jinda doesn't give face to anyone, and he won't give him face. Besides, the territory of Niu Jinda, next to the Dingxiang Governor's Mansion, is the bridgehead of the shock and deterrence of Murowei, in case of a war, borrowing troops and food, you don't necessarily have to ask Wei Chi Gong.

"It's really powerful."

Wang Xiaotong was full of emotion, and said in his heart that such a young man, he has lived this life, and he has such a scenery because of the former Sui Yang Xuangan.

It's a pity that Yang Xuangan relies on his father, and Zhang De really has goods in his stomach.

"Then the old man should also leave for Hebei Province."

"Just right, Prince, I am in Jizhou, Pingzhou, and I also have an old age. Li Desheng, the son of the governor of Youzhou, if the prince is obstructed by Xiaoxiao, just look for him. ”

Then he took out another jade plate and handed it to Wang Xiaotong, "With this jade card, all the materials of the China Resources in Youzhou, Jizhou and Pingzhou can be called." The new repair of the Niangzi River estuary water village, how to manage it, still needs the prince to share a lot of worries. ”

"At a young age, I actually made a foreman for you......"

Wang Xiaotong teased, but still took the jade plate with a smile, and then said, "According to the old man's opinion, it is better to place the land of iron smelting in Jizhou, Pingzhou." When he was young, he traveled to two places, regardless of charcoal, fire, masonry, and water sources. And the waterway is wide and gentle, and it can also be transported by sea, and the three waters converge on the Bohai Sea, and the turnover is very convenient. ”

"It's really the same as what the heroes see, and my opinion is also between Jizhou and Pingzhou."

Zhang De's eyes lit up, it is really good to engage in processing of incoming materials in this territory, as long as the wharf at the mouth of Bohai Sea is built, it will go south directly along the coastline. The abundant timber resources in Northeast China are terrifying, and the two major raw materials of coal ore, whether it is Northeast Hebei or Mobei, are amazingly reserved.

This is a good place to engage in the coal and steel industry, and the most important point is that there are also policy advantages!

Lao Tzu doesn't need to look at Li Dong's face when mining on the grassland, hahahahaha......

Every time Zhang De thinks of this, his blood boils-

PS: Tang Dynasty Engineering Dog Group Number: 499129940 (To be continued.) )

PS: To be a rising engineering dog.