Zhen Rong watched Cai Yan's creation of "The Goddess of Luo River" in the inner hall to create momentum for the upcoming charlatan. A group of women who can naturally gossip for a long time when they discuss literary and painting skills.

The men outside talked about official duties and almost communicated the relevant situation clearly.

Zhuge Jin also knew all the news about the serious matters that Zhuge Jin's wife learned in the inner courtyard, and the technical details were more known than his wife, so there is no need to repeat them.

While Li Su was talking to them, the worker Cao came to report to the Huanjie, saying that it was Li Su who wanted to meet and offered advice to Liangzhou. The famous worker in the Western Regions had already arrived. Li Su and Zhuge Jin were signaling:

"Then let's take the exam together to see who can think of the conflicts between waterlogging, land preparation, and water extraction in Luoyang New City, and how to implement it."

Brother Zhuge: "It's just open your eyes together to see what kind of person he is."

Especially Zhuge Liang, he himself is very knowledgeable in science and engineering, and his wife is also a skilled person. However, they are more specialized in mechanical inventions than civil engineering, which is considered to be a professional profession.

After Li Su's problem was abandoned this time, Zhuge Liang and Huang Yueying also helped to figure it out, but there were no results.

After a while, Huan Jie brought a teenager with thick hands and feet into it, holding a few secret scrolls and a large wooden box, and I don’t know what it contained.

This person looks very young and should be less than fifteen years old, unlike the age to come out to do things.

Li Su was very surprised. He didn't believe that a young man could come up with a feasible engineering and technical strategy. Could it be that this young man was just an explanation, and the person who really used his brain behind him had not come yet?

Li Su asked naturally and majesticly: "Where is the person of Ruzi? What is his origin? You are so young, but the plan you want to say in a while is really up to you?"

The young man dared not be arrogant as a genius and bowed respectfully first.

After all, the one in front of him was the first civil minister of the Han Dynasty. Sikong, who was awarded a reward of 300 to 100 gold to 100 gold, came to seek talent. Even those with real skills did not dare to be crazy.

The young man replied: "In the lower Sanfu Fufeng County people named Ma Jun, who is one of the thirteenth year of this year. But Sikong, although I am young, I... I have a lot of experience in craftsmanship.

Two years ago, I traveled to Jincheng County with my clan members and met Liujiaxiayan in Lanzhou. I also made some suggestions to participate when Xu Fujun was in charge of local work. I also met many skilled craftsmen in the northwest who gathered in Lanzhou, and even foreigners from the Western Regions who came from Mu Dahan reopened the trade route..."

Ma Jun often stutters when speaking, and is obviously a person who is not good at speaking. He talks endlessly when encountering professional problems like Han Feizi, but he can't explain clearly when he or she orally. At the same time, the narrative is erratic and does not focus on the key points.

However, when Li Su heard Ma Jun’s name be reported, he had already remembered this person.

After all, although Ma Jun is not a figure in "The Three Kingdoms", he is more famous in later generations than many famous generals and ministers of the Three Kingdoms.

It is mainly because in the later generations, Li Su lived, that the promotion of ancient industrial technology achievements was politically correct. The biographies of ancient technicians such as Ma Jun and Shen Kuo can be extracted into extracurricular reading books for classical Chinese.

Basically, students who read Chinese seriously know these people.

Judging from Ma Jun's oral statement, his growth in this life is obviously much more "adventure" with butterfly effect than his original trajectory in his early life.

It is mainly because Li Su planned so many infrastructure projects in Lanzhou City, Liangzhou in the past few years, allowing Xu Shu to build water conservancy at the level of Liujiaxia, and so many spinning workshops and cotton weaving workshops, which attracted a large number of northwest engineering talents to travel and study, and as a result, Ma Jun also had a certain degree of super development.

(Note: Ma Jun's birth and death year is unknown, but his historical deeds were mainly during the reign of Emperor Ming of Wei, and later when Qin Lang and Cao Shuang were in power. That is, they were active in 230 to 250 years.

Even if he was already fifty or sixty years old at that time, he was just a teenager in his teens for thirty or forty years. So I temporarily set that he was currently thirteen or fourteen years old and had no ability to stand alone. He was still in his study tour and needed the cooperation and discussions of others, which was more reasonable.)

Since Li Su already knew Ma Jun's origin, he didn't want to listen to his resume more trivial. He raised his hand slightly and signaled to directly talk about the key points:

"Young people are terrifying, but I'll answer the question first. You are not good at speaking. Why do you and your party still ask you to report? What you want to say today is your result?"

Ma Jun was a little ashamed, not knowing whether he was talking clumsy for his eloquence or because his technical achievements were not solid enough. He thought for a long time and then organized his language before he stuttering:

"I dare not deceive Sikong. In the two matters of "solving large-scale water draw" and "relying on the former site of Biguiyuan to repair the Beichang Gongyuan", the contribution of design ingenious ideas does not account for the main point, but I think it is 30% or 40%.

The reason why my fellow travelers asked me to report was that the other craftsmen were visitors from the Western Regions and their words were not as good as me. Although they had Anxi Tong interpreters, they did not understand technology.

Although I didn’t invent all of the things I wanted to say later, I at least understood them thoroughly and could explain them clearly. When it comes to technical issues, I will have a clear idea and a convenient mouth. I would like to ask Sikong to give me a chance."

(I won’t write the stuttering words in the latter part, so I can save you water. Everyone can think about Ma Jun’s words and stuttering.)

Seeing that he was honest, Li Su admitted that he was thirteen or fourteen years old and was unable to complete the design alone, but just understood the technical principles and sorted out the retelling. This was not surprising.

This is equivalent to just a person responsible for reporting PPT.

He didn't have much trouble, so he asked Ma Jun to go straight to the point and report on the technical part, and also helped the engineering talent who was stuttering to find some confidence.

As for personnel, it is not too late to understand the technology after talking about it later. This is the way to respect technicians.

Li Su nodded: "Then let's choose the most important thing first. If Luoyang New City is built on the gentle slope of the Mangshan Mountain, how to solve the problem of water extraction? Explain it in detail."

After hearing Li Su finally asked about technology, the young man Ma Jun was excited and his stuttering was relieved a lot. After sorting out his thoughts, he began to state:

"If Luoyang New City is located on the eastern and southern slopes of Mangshan on the west bank of the intersection of Heluo, it will be difficult to draw water. We have estimated that there are two ways to solve it, which can meet the domestic water for a scale of 100,000 people and the domestic water for a scale of 100,000 people.

If there were not many people in Xincheng in the early days, the imperial court would not invest too much in one-time projects, so they would directly dig a side channel more than ten miles upstream of the north shore of the Luoshui River to divert water. At a location slightly higher than the downstream, they would choose the dam at the valley entrance to form a huge reservoir or even a small lake.

Then, we will use the new type of overturn we have tried to improve, and the water truck will lift water to this high dam lake and divert it to the city. This method has little investment in the early stage, but the cost is high every year during use."

Li Su waved his hand: "It's just a cliché. It's not enough to fill the river by raising water to supply so many people. Tell me about the radical plan that "it's huge and once and for all" mentioned in your memorial this morning."

Ma Jun took a deep breath, as if considering whether Li Su has the courage, and then put forward a plan that shocked Li Su:

"The first set of solutions is indeed expensive to operate, and it is not a problem to treat the symptoms. To treat the root cause, it will cost at least billions of yuan! You can swim from the Yishui River, before the Yishui River flows out of Funiu Mountain in Longmen Yique, choose a position where the river water drop has not dropped sharply;

In advance, we will intercept and drain the water, and walk another newly built water diversion channel out of thin air. Calculate the slope of the whole journey and slowly descend. The flying frame is thirty or forty miles, passing through the narrowest part of the low-lying valley of Yichuan, between Funiu Mountain and Beimang Mountain.

Then you can build a river along the mountain along the Beim Mountain, and add the channel along the Yique Mountain in Funiu Mountain. These two parts together are about seventy or eighty miles, and finally you can lead them to Luoyang New City!

In this plan, the construction cost of 70 to 80-mile water diversion canal built on Funiu Mountain and Beim Mountain will not be too much, because it can be based on the original mountain drop, which is about as expensive as digging a plain canal of the same distance, and is even cheaper, because the water volume and cross-sectional area of ​​the water diversion canal do not need to be as large as the canal.

It is estimated that during the Warring States Period, the Wei people dug chasm, and every hundred miles cost half a billion yuan. Now that technology has improved, it is not enough to use that, about 60 to 70 million yuan.

The most expensive thing here is to use thirty or forty miles to cover the Yiluo Valley, and you have to use stone to repair the elevated canal. Each mile costs at least ten times the expense of building canals on the plain. There are hundreds of miles and one billion on the plain, which is one mile and one million.

If four billion yuan can be invested, it can solve the problem of millions of people using water in Luoyang New City in the future, and it can also prevent Luoyang New City from encountering floods due to its low-lying location. I dare not say it at the beginning, but I am afraid that Sikong will be scared by this money."

Li Su was indeed a little scared by this offer, but the focus was not just on the amount of money.

But because he was shocked to find that the plan Ma Jun came up with was actually a "elevated canal"!

He actually wanted to build an elevated turret in the late Han Dynasty!

This is definitely not a spontaneous thinking pattern of the Han Dynasty!

"When he came, he said that he had made suggestions in Lanzhou in recent years and had encountered strangers from the Western Regions. Now he can actually come up with a plan for elevated canals. Could it be..." Li Su thought of this and almost blurted out his questions.

Li Su: "There are famous Qin craftsmen in your team who come from a place far west than Taixifeng?! How did they come to rest in peace? How could they be the big man who is moving around?!"

Now, it was Ma Jun's turn to be shocked. He instantly felt that Li Sikong was indeed a born saint, and he knew everything.

Li Sikong actually knew that in the Western Regions Yike team he made during his work experience in Lanzhou, there were people who called themselves Roma Chinese, and the Han people were often called engineers from the "Da Qin" because of the old habits of Ban Chao and Gan Ying.

There is no way. After all, those who have learned a little history will first think of the Roman Empire when they heard that at the end of the Han Dynasty, some people built stone roads and even stone elevated water diversion channels at the end of the Han Dynasty.

At that time, the East and the West had their own strengths. Europe was completely backward after Rome was defeated and entered the dark age. The Han Dynasty had advanced places in the Han Dynasty, but the Romans did make their own unique achievements in the stone-made urban public infrastructure.

There is nothing embarrassing to learn from others' strengths, abandon flaws and use them, and learn from the strengths of the barbarians to control the barbarians.

Li Su seems to be proud, because he cooperated with Guan Yu three years ago to completely eliminate Guo Si's reign and the Qiang Rebellion in Liangzhou. On the one hand, he vigorously developed the northwest industry and commerce, and established Lanzhou, a major hydraulic textile industry center and the northwest hub, and attracted so many Western Regions merchants to encourage foreign trade. Otherwise, these "foreign lands" situations that should not have occurred would not have been able to be born.

After all, this is definitely Li Su's "investment" well done.
Chapter completed!