In Guo Rong's impression, Yugong moves mountains, which represents a spirit that Chinese people have-perseverance.

It's just that it's really just an impression.

In fact, Guo Rong never imagined that more than a thousand years ago, in the absence of large machinery and tools, people could really wake up sleeping mountains and change the appearance of mountains and rivers with their hands.

Li Bai said that it is difficult to go to Shu and to go to the sky.

The mountains and plateaus in northern Shaanxi may not be as dangerous as Shu Road, but northern Shaanxi is also densely covered with mountains and rivers.

This kind of terrain of mountains, loess, sand and gravel is intertwined, and in terms of road construction, it is slightly stronger than Shu Road, but it is limited.

This road is obviously newly built, of course, this is nonsense, Guo Rong knew that at least a year ago, it was still a mountain path that could only be narrow, closed, and could only be walked, not horseback riding, and not open to traffic.

Now, in front of Guo Rong, Li Yu and the entire returning forbidden army, there is a smooth road that can be ridden and can pass through the carriage.

Although it cannot be compared with the two-way six-lane highway of later generations, it is impossible to be as tight as the concrete road or asphalt road......

The road under his feet was new, smooth, and had a solid foundation, and the degree of passability completely exceeded Guo Rong's ideal expectations.

It can be said that the construction specifications of this coal transportation line expected by Guo Rong are higher than the specifications and standards of any official road that Guo Rong has seen.

To get rich, build roads first, have fewer children, raise bears, this is the future generations of children know the smooth mouth, in the imperial era, there are definitely a lot of people who understand this, but really willing, and really invested in only a few people, Guo Rong feels that the standard of the road under his feet, perhaps only the legendary first emperor ordered to build the gallop road in the country can be compared.

According to Guo Rong's visual observation, with the quality of the foot soldiers of the Changying Army, marching on this road is like a smooth road, and there is absolutely no problem in marching 50 to 60 miles a day.

The light cavalry in the army of the long tassels could run at a fairly high speed, and it is no exaggeration to say that the heavy cavalry and even the mounted cavalry could even charge in formation on this road.

After the Changying Army has been improved, there is no problem with the special logistics carriage traveling here, even if it is the Emperor's extra-large special carriage, at least three can be paralleled, and there is no problem with the special carriage of the Changying Army running four in parallel.

Now this road has not yet been smoothed, the flow of people who build roads and transport raw coal has never been cut off, and everyone in the court has high standards and strict requirements for this road, Guo Rong bets that after this road is completely built, the guys in the Chang'an court will definitely try their best to develop the potential of this road.

Considering the tradition of China since ancient times, when this idea escalates to the will of the state, Guo Rong will not be surprised when the time comes, even if this road runs day and night for twelve hours a day.

And this is terrifying, after all, the capacity of the carriage is far beyond the reach of manpower, and the amount of raw coal that can be transported by four carriages in both directions will reach a staggering amount per day.

If that day really comes, this road will probably become the busiest road in the entire Datang, and it is not impossible to call it the economic lifeline of Datang, or the main energy artery.

Guo Rong is very clear about the truth, and the future is also very expected, but Guo Rong is more curious that even in later generations, it is not easy to build roads in this terrain, and now, in the era when there is neither cement, nor mortar, nor asphalt, nor large machinery, how did craftsmen build such a road with their bare hands.

Guo Rong felt that something should be done to help the construction of this road.

After all, completing the road from Fugu to Chang'an one day earlier is equivalent to completing the energy artery from Datang one day earlier, so that Datang's national strength can recover faster.

After all, the faster the Tang Dynasty's national strength recovers, the better the material foundation can be provided for itself, and the sooner it can start its westward expedition.

After all, the significance of this artery is not only coal, but also an important communication line connecting the north and the south and supporting the direction of Mobei in the military field, just like the consolidation of the Qinghai-Tibet Railway and the Xinlan Railway in later generations.

Guo Rong doesn't understand, there are naturally people in the Changying Army who understand, after all, the Changying Army has the most professional civil engineer in the entire Tang Dynasty - the famous Changying Army Engineer Battalion.

If it was two or three years ago, when the Changying Army was first founded, these guys who had just changed from civilians or craftsmen to auxiliary soldiers of the Changying Army Engineer Battalion were still trembling when they saw Guo Rong, and they would explain in a down-to-earth manner in the face of Guo Rong's advice.

However, at this time, after several years of tempering, these are no longer the same in terms of professionalism, tactical technology, combat experience, and status in the army.

In the face of Guo Rong's frank and humble consultation, the craftsmen in the Changying Army Engineer Battalion were very speechless about the very uninformed performance of their boss.

They expressed their disdain with ruthless white eyes, and seemed to be very disdainful of answering questions that even a fool like Guo Rong should know.

Until the end, a relatively young guy, feeling that he couldn't look at it, pointed to the boulders on both sides of the road that had been built, and then left Guo Rong's side as if he was hiding from the plague, as if he stayed with Guo Rong for a while, he would be infected by Guo Rong's IQ.

Guo Rong, who was confused, was both aggrieved and helpless about this group of ancestors, while muttering that these guys are generally not like this, while studying the stones on the side of the road, but he didn't find any clues after studying all the way.

It's just that as the road continued to move forward, after walking for dozens of miles, as the road was no longer smooth and steady, the number of craftsmen, people, and servants increased dramatically, and Guo Rong saw how the Tang people built the road in front of them.

Under the guidance of craftsmen, countless migrant workers ignited the coal pieces transported by the servants and burned the rocks on both sides of the road.

After the rocks were burned by the fire, the people who had prepared them poured the prepared cold water directly on the hot rocks.

Cycle.

Seeing this scene, Guo Rong was dumbfounded, it turned out that these people used this method......

Guo Rong knew about this method, and even heard the craftsmen of the Changying Army say it, but there were only two points, one was that it required a large amount of fuel for incineration, which was naturally used in places where the forest density was not high and it was inconvenient to cut down trees for firewood.

Second, it needs a lot of water resources, like the northwest place, don't even think about it.

However, the starting point of this road is to transport coal, fuel is naturally not lacking, as for water, now Datang is still in the era of mild climate, not to mention the dense river network in northern Shaanxi, at least there is no shortage of water.

As a result, the two major obstacles that constrain this approach have been resolved.

Using the principle of thermal expansion and cold contraction, local materials are taken, and natural cement is fired by using mountain stones, which solves the boulders blocking the road, widens the road, and obtains inexhaustible raw materials.

For this kind of way of using existing resources to the limit, which can be called a ghost, Guo Rong can only give a big blessing in his heart.

This once again strengthened Guo Rong's belief from the beginning that the ancients, especially the Tang people, were not stupider than ordinary modern people, on the contrary, the ancient people in China were smart to the limit.

Of course, the use of stones to make natural cement is only the first step in the whole road construction industry, and it is also the most basic project.

When the width of the road surface is basically determined, the second step of the road construction army is to make "cooked soil", and this step is the most important.

The craftsmen of the Changying Army avoided Guo Rong like a plague, but the officials and craftsmen of the Ministry of Works, the Ministry of Households, and the General Supervisor who were responsible for building the road did not dare to neglect the general Guo Rong.

Through inquiry, Guo Rong learned that in fact, the civil engineers in China had long recognized the destructive effect of plants on buildings.

Therefore, the soil used in the construction of Qin Zhidao is "cooked soil", that is, the soil is heated to kill microorganisms, plant seeds, roots and other debris in the soil.

After the production of the cooked soil is completed, the finished cooked soil is laid layer by layer and repeatedly tamped.

"To be able to do this, it's no wonder that Qianqin's straight road can be used for several years, and Master Mao has worked hard."

Guo Rong's praise obviously gave Guo Rong a great encouragement to the official in charge of road construction in the Ministry of Industry named Mao Yunpeng.

"General, however, in reality, these alone are not enough to meet the requirements of a thousand years!"

"What?"

"General, it is already the limit to be able to maintain it for hundreds of years just by familiarizing the soil and tamping it, in fact, among the craftsmen of the former Qin, the requirements for building straight roads are extremely strict, in order to save their lives, those masters who have inherited from the Mo family have come up with the secrets that have been passed down for countless years."

, Guo Rong was really shocked this time, this TM cheats have come out, but don't suddenly soar......

Fortunately, Mao Yunpeng's words behind him were not the way of cultivating immortals.

"The straight road can be done for thousands of years without damage, the important thing is that they are outside the fixed procedure, before tamping the roadbed, in the prepared cooked soil mixed with saline, lime and other saline-alkali substances to destroy the substrate ...... plant growth, but this will greatly increase the cost and construction period, so ......"

"What about you?"

Looking at Guo Rong, who was shocked, puzzled, and puzzled, Mao Yunpeng's face showed a confident and proud look.

"This is thanks to the general!"

"Huh?"

"The mountain stone powder fired in order to open up the mountain road is the best raw material of cooked soil, and the cinder after incineration is the most convenient additive, so it is ......,"

"In fact, Yun Peng's ancestors inherited from the Mo family, Yun Peng naturally knew the use of coal, and he neglected to develop the coal, coal, and ink stone in various parts of my Tang Dynasty very early, but he never got the attention of Shangguan or the imperial court,"

"Since the great general, the general has dredging the development of Fugu coal...... Yun Peng was so happy, so when the Ministry of Chinese Books and the Ministry of Development and Reform wanted to build this road, Yun Peng took the initiative to ask for it, and made a military order, and the entire 1,500 miles of road must be completed within five years. ”

Chunchun is a sixth child, Guo Rong's eyes are almost straight!

The road looks less than 1,000 kilometers, which is not particularly exaggerated, but considering the gap between science and technology and the times, the significance of this road is no less than that of the Great Wall and the Beijing-Hangzhou Grand Canal.

It seems that he is only in his thirties, his official position is not even four grades, and he has never even heard of a name in the Ministry of Industry, but he is such a huge one, no less than the chief engineer of the "Three Gorges Dam" project.

Under the leadership of Mao Yunpeng, Guo Rong observed every step of the entire road construction process, and learned about the construction of the entire road from Mao Yunpeng's mouth.

In less than a year, in this vast mountain road, under the overall planning of Mao Yunpeng and the efforts of more than 100,000 people, the entire 1,600-mile road has been completed for more than 200 miles.

To be honest, Guo Rong was already very shocked by this achievement, but it seemed that he was still a little short of Mao Yunpeng's military order.

Accompanied by Mao Yunpeng, the road that had just been carved out, looking at the long queues lined up all over the mountains, and looking at the busy, tired, and swarthy craftsmen and people, Guo Rong had to pay tribute to this ambitious and talented man.

At the same time, a question popped up in Guo Rong's mind.

It is said that Jingzhou does not allow such awesome characters to appear, so why can I always meet such awesome characters in Datang!

After thinking about it, Guo Rong finally came to a conclusion, that is, because of the real Tang Dynasty!

Only the Tang Dynasty gave birth to countless literary giants, only the Tang Dynasty could give birth to invincible generals, and similarly, only the Tang Dynasty could give birth to countless eclectic and talented talents like Mao Yunpeng.

After sighing for a long time, Guo Rong decided to go back and ask his engineer battalion, in case he could help, even if it was meaningful to save a few months of time.

Returning to the camp from the construction site, Guo Rong directly gathered the ancestors in the camp with a military order, and then went straight in.

"Building roads, after getting the same content, to be honest, are you familiar with it?"

Fortunately, as soon as this sentence came out, the famous and surnamed uncles of the Changying Army present were all on pins and needles, and they had a tendency to run away at any time, and Guo Rong was dumbfounded by this scene.

After watching it for a long time, he found that no one responded to his question, Guo Rong was angry, did these people see the hell today, the angry Guo Rong directly named him.

"Wu Pengjun, you say!"

The original core figure of the Changying Military Engineer Battalion was Lan Miao, but at this time, Lan Miao had been seconded by the Emperor Taishang to secretly study the steam engine that could be put into use in Chang'an.

So at this time, Wu Pengjun, who is better at construction, has become the core figure of the engineer battalion left in Chang'an at this moment, and at this time, in the face of Guo Rong's angry inquiry, Wu Pengjun was dazed and helpless, staring at Guo Rong for a long time and crying for a long time After being ineffective, he could only be forced to speak.

"Head, there is a specialization in the art of construction, and the lowly profession is learning construction and equipment, but construction and construction are not exactly the same, as for the construction of roads, although we are also involved, but it is not the main item, and our focus is not the same direction. In this regard, Lao Mao is more professional, I also asked him when I was in the Ministry of Industry, his ancestors were from the Mo family, and you asked him ...... head"

"Of course I know that there is a specialization in the art industry, I want to ask him, do you still need to ask you? I just wanted to ask if there was anything we could do to help him! ”

Halfway through speaking, Guo Rong stopped his voice and looked around suspiciously.

"Aren't you usually quite positive, what's going on today, Wu Pengjun, you made it clear to me!"

"Head, I can say, but, your assurance, I'm helping, not retiring and going back to the Ministry of Engineering to repair roads......"

“？？？”

The words that the road lips are not the horse's mouth, and the donkey's tail is not the horse's head make Guo Rong look confused.

"When did I say that you should go back to the Ministry of Works?"

"Head, haven't you already retired some of your brothers in Mobei, Lantou also took a group of people to Chang'an ......, and some brothers went to other camps......"

"Mobei retired are old soldiers and scouts, Lan Miao was borrowed by the Emperor Taishang, as for the other battalions, they have all been promoted when they go out, is there something wrong with your gang?"

"Oh~Whew~"

After Guo Rong roared with a whining voice, a feeling of surprise and relief instantly came from the big tent full of craftsmen.

Looking at the reactions of these guys, Guo Rong suddenly understood the reason for these guys' abnormality, and scolded helplessly.

"Is Lao Tzu sick in the brain, if it weren't for the road repair, I would like to dig in Mao Yunpeng and let you go back to the Ministry of Engineering, am I crazy!"

"Head, are you serious?"

Wu Pengjun's words made Guo Rong cry and laugh.

"You dogs, Lao Tzu still wants to fight back to Anxi! All of you are gone, what will Lao Tzu do to send back to Anxi? ”

At this moment, all the people were stable, and they began to be eager to try, and before Guo Rong could speak, they began to make suggestions one by one.

"Head, we are really not as good as Mao Yunpeng on the road, they are ancestors, but we also know their methods, I have also gone to see them when I passed by these days, and they don't have many of our things! Let's throw them ten streets on the equipment! ”

"That's right, we are the engineer battalion of the Changying Army, what we do is to build roads in the mountains, build bridges in the water, camp in peacetime, prepare for war, they can use many emergency methods we usually use, temporarily improve their passage and execution capabilities, and also speed up their speed......"

"Pre-war preparation equipment. Set up camp in peacetime and prepare ordnance in wartime. Relatively speaking, we don't usually use such a bulky method. For the passage of large armies, we will use some temporary methods, which are not suitable if they are placed. ”

"Now most of their things are still carried on their shoulders, even if there are not many carriages, and the carriages are still extremely backward, we are different, after customizing the carriage for the Emperor, our carriages have independent bearings and connecting rod ......, using our carriages, absolutely making them more efficient."

"Also, let's help the catapult with the crane and loading equipment when it is loaded with stones, and you can move the boulders with things, which is much better than if they can only burn in place, and when the time comes, ......"

"Also, Wuhan University is an expert in building bridges, let them list the bridges that need to be built first, and we will see if we can temporarily build a few ...... for them."

"Head, there is also the big killing weapon you ordered before, I already have a preliminary prototype here, do you want to provide it to them!"

"The Big Killer?"

The composition of the original Changying Army was very complex, and there were a small number of Taoist priests like Zhang Jiaxuan, who were born in Taoism.

Guo Rong spent a lot of energy to make sure that these Dao masters were loyal, trustworthy, and capable enough, and after he had also been exposed to alchemy, he decisively handed over the research of the big killing weapon to these guys.

Originally, Guo Rong wanted to carry out secret research and development in the Eldest Princess's Mansion, but the movement of this thing was too big, and it was not very good to always use thunder as an excuse, so Guo Rong took a few guys on the way to the expedition.

When I was in the Central Plains, I didn't have much chance, but when I was in Mobei, these guys could be regarded as the best place to experiment.

Originally, Guo Rong didn't want to get this thing out too soon, but now, ......

"How far have you guys studied?"

"Oh, head, it's absolutely no problem for that thing to blow up the city wall with its current power, and it's definitely easy to use to open the mountain, it's definitely easier than them burning stones now, just pay attention to safety when using it, otherwise it's the same as killing people like playing."