Han Qi is very satisfied, what he is satisfied with is not the construction of the bridge, the construction of the bridge, but a lively, he does not understand the construction of the bridge, but he knows a lot about other aspects.

When observing this railway, there is such an unexpected gain as a crane, even if it is a simple understanding, I also know that it can save one-third of the time of the fortress, which is very important for Han Qi, who has realized the benefits of the fortress, and after answering Han Qi's question about prefabricated parts in affirmatively, after providing some support for the construction of the fortress, Zhao Xin also proposed another solution.

Before, what Zhao Xin gave to Han Qi was a complete version of the fortress, and even, after crossing the process of the fortress from embryonic to mature, it was the most mature fortress that was directly given.

Even after some adjustments and overall planning, the difficulty of construction has been greatly reduced, and it takes thirty or forty days to complete the construction of a fortress.

Han Qi had proposed the prefabricated parts before, which made Zhao Xin suddenly have a new idea and give a half-finished fortress.

This kind of semi-finished fortress is to remove some unnecessary places, regardless of some internal settings, and use the simplest, even temporary wooden structure, rather than protective things, to build the interior of the fortress.

On the outside, just build the wall, so that the speed of the fortress can even be doubled, and it can be completed in a maximum of 15 days.

With this kind of semi-finished product, their degree of protection will be reduced to a minimum value, but it is still a good choice.

The strength of the fortress is all-round, the exquisite design, the internal space, and the flexible defensive methods are all powerful places of the fortress, but the real strength of the fortress is always on the walls of the fortress.

A city wall with a height of more than 25 meters is one of the reasons why the fortress is strong, even if there is no internal layout and can not be used flexibly, the city wall alone is enough to make the fortress have a strong protective ability.

However, without the internal arrangement, if there is only a city wall, the defensive capacity of the fortress is reduced by at least two-thirds, and it is not impossible to capture forever.

So what's the problem, no matter how simplified the fortress is, it is not 10 times, or even 20 times that can be easily captured, and if you simply capture the city wall, you need to pay 5 times the defenders, or even 10 times the casualties, before it is possible to capture the fortress.

Zhao Xin just said casually, since Han Qi wants to use prefabricated parts to simplify the construction process of the fortress, it is better to simplify it a little more, in key places, this kind of semi-finished fortress can play a role very quickly, and play a great tactical role on the battlefield.

But when he told Han Qi in detail, he didn't expect that Han Qi's eyes lit up directly.

Different from Zhao Xin's different military affairs, Han Qi is a civilian official who came out of the battlefield, and he has participated in wars large and small, and he doesn't know how many people he has.

The fortress is very powerful, which has been witnessed in the Battle of the Northwest, but faintly, Han Qi always feels a little wasteful.

A fortress that can never be breached, in terms of defensive operations, is good, but this kind of defense, for tactics, is not very suitable, naming a fortress that cannot be attacked, how many people will attack?

But with such a semi-finished product, it seems that the defense has declined, but the tactical role has increased.

A fortress, 500 people standard, the minimum consumption of 2,500 people, really arranged 10 fortresses, this is 25,000 people, these are not simple cannon fodder, these are all elites, even if it is the strongest of the three kingdoms, Liao, it is impossible to change the color of the face, let a large number of elites, just consume.

Similarly, the construction speed is fast, the internal layout is reduced, and the cost has been reduced a lot, and the simple exterior wall may only invest 1500 guan, and even because of the problem of saving, if a complete version is to be formed in the future, it will be wasted 300 to 500 guan, it seems that it is a very wasteful behavior, the efficiency has been improved, and the effect has also been improved, and a commander like Han Qi has never thought that it is the best that can never be captured.

In practical application, when the two armies face each other, what tests the commander is how to use the army more accurately.

There is nothing wrong with the saying that Ci is not in charge of the army, those who can really become commanders will never be afraid of sacrifice, and at critical moments, they can even sacrifice some people.

One will succeed and use a part of the army to consume the opponent, this is what the commander should do, and there are people who are willing to do one to two, let alone one to five.

500 consumes 2500 people, or even more, any commander will make such an exchange, unless it is in some key place, once abandoned, it will cause a chain reaction.

After listening to Han Qi's story, Zhao Xin couldn't help but sigh, sure enough, he was not suitable to be a commander, he really couldn't do such a cold-blooded arrangement, but after thinking about it carefully, what Han Qi said was very reasonable.

Use some protection, which is powerful, but not impossible to capture, to attract the opponent to attack, defensive warfare, it is always easier for the defender, a defense that can never be captured, and the other party will also try everything possible to bypass these.

But with layers of defense, layer by layer to weaken the opponent's attack, when it really comes to the decisive battlefield, the enemy has been consumed to the extreme, and of course the battle is invincible.

Regarding the military, Zhao Xin didn't have much right to speak, at most he could only suggest that since Han Qi thought it was good to do this, then he would do it, anyway, no matter how the Northern Song Dynasty developed now, there would be no problems, with a longbow and a fortress as a base, even the strongest Mongolia would not be afraid to fight, let alone the far inferior Liao State.

A relatively choked, but not very important bridge, right under the noses of Zhao Xin and Han Qi, began to be slowly completed, this is just one of the construction sites, in the entire Yingtianfu to Bianliang more than 300 miles range, there are many similar construction sites.

The reason why China has been able to create a splendid civilization is because this is the most suitable place for reproduction, where there are cities, there must be water, there must be rivers, the Central Plains because of the emergence of the Yellow River, the density of the water network is not as developed as that of the south of the Yangtze River, but in a straight line, every three or five miles, there is a river, which is also normal, sometimes, even as close as one or two miles.

On the entire railway construction route, large and small rivers, the longest and the shortest, are even more than 10 times different.

These early constructions will determine the extent of the entire construction period, and after the Spring Festival, with the gradual completion of bridges, the laying of railroad tracks has also begun.

In the distance of 300 miles, it was divided into 10 lots, each of which was only 30 miles away, and then recruited a large number of middle-aged laborers to carry out the construction.

The construction of railways, in this era, was almost entirely carried out by labor.

The most important thing about the railway is all kinds of building materials, sleepers, or rails, not every place, there are convenient traffic conditions, separate rails are not heavy, according to the standards of later generations, a 12-meter rail, the average weight per meter is about 25 kilograms, that is to say, a 12-meter rail, that is, 300 kilograms, which is basically a two-wheeled carriage, can pull up two.

Four-wheeled carriages, can pull more, almost able to pull up six or seven heels, but that kind of carriage, the requirements for the road are very high, according to the previous plan, the entire engineering department, a large number of horses and carriages to start the transportation of raw materials.

For example, a sand field and a stone field were opened nearby, and even a part of the brick factory, for which some technology was even leaked, so that red bricks began to gradually appear in the Northern Song Dynasty.

For these, Zhao Xin basically does not care, in fact, similar to cement, bricks and other basic building materials, if the cost of transportation, when the cost of a certain level, can not occupy the market at all, the general cement plant radiation range of hundreds of miles, no more than 1000 miles, but the brick factory, is basically near the city.

A few cents a piece, or even less profit, when the transportation cost surges, will directly make this factory yellow.

Basic building materials such as cement and bricks, in the gradual development, Zhao Xin is ready to let go, for example, the formula of cement has been handed over to the Northern Song Dynasty, and the formula is gradually released, just focusing on the high-end.

The construction of the railway, in addition to cement bricks and sleepers, the most important thing is the rails, which cannot be let go, and only the iron and steel plant of the Ding Navy can produce rails.

These rails need to be transported by water from the Ding Navy, where they will be transited at Hongze Lake.

The railway from Yingtianfu to Bianliang passes through many rivers, but only the Bianhe River and a few larger tributaries can be passed.

The Bianhe River is a member of the Beijing-Hangzhou Grand Canal system in the Northern Song Dynasty, and it is also a very important part, which can be said to contain the throat, and the construction of this railway is to alleviate all this.

Just after the Spring Festival, the ice and snow in the cold north have not completely melted, but with the help of icebreakers, the Bianhe River can be kept navigable.

This helped to build the railway, which was busy except in winter, crowded with boats, and it was very difficult to transport the rails and other construction materials in between.

A 150-kilometer-long railway, two rails is 300 kilometers, one meter is 25 kilograms, one kilometer is 25 tons, a total of 7,500 tons of rails are needed, plus other iron tools and materials, the total transportation volume is at least 50,000 tons.

This amount of transportation, for the already busy Bianhe, is a nightmare in ordinary times, and I am afraid that it will take a lot of time to transport all kinds of materials.

Now, under the premise of almost monopoly, a large number of materials, transported to various ports by water, with these ports as nodes, a large number of warehouses have been built, and the materials transported from the Dinghai Navy have been continuously transported to these warehouses, which can greatly save time, so that the distance from each rail to the construction site is not more than 50 miles, which is also a very beneficial thing for the construction of the entire railway.

Compared with the construction during the day and the system that stops at night, the other engineering teams are working almost day and night, especially the simplest earthwork, and he will even work until the night, under the light of some horse lanterns.

If there is an aerial photography drone, you can see that in a distance of more than 300 miles, countless people are sweating here day and night, and it is their efforts that an epoch-making project is being completed rapidly.

In the middle, there is a larger overall planning system, they are almost like lubricating oil, integrated into the construction of the entire railway, through the fast horse, the construction status of the entire railway, summarized and coordinated, through calculation and coordination, the overall construction speed.

For example, some smaller bridges will be built with fewer people and will be built slowly, and some larger bridges will be built with more people.

Of course, there are exceptions, Zhao Xin and the bridge they observed, is an exception, this relatively small bridge, its own construction priority, far lower than the others, even the crane will arrive in a week, a week later, is the peak of its construction.

The arrival of Zhao Xin and Han Qi changed the process, making it a week earlier, and inevitably, it had a certain impact on the overall plan.

However, a bridge that is only a dozen meters long has little impact on the overall situation, and it is built first, and as long as it is slightly adjusted, the final impact will be minimal.

In fact, the construction progress is much faster than planned, the more developed water transportation system, the unhindered independent transportation, and the enthusiasm of the laborers because of the excellent treatment and food.

In this era, ordinary peasants are still relatively simple, and they have to go to big cities and busy ports to find a job of 100 wen a day, which they can get at their doorstep, and the standard of food is still very high.

If there is no overall planning, such hard work, there is no way to improve efficiency, each section has a fixed construction period, you have improved here, there is no way to improve, some bridges, are fixed time, not to say that adjustment can be adjusted.

But with the co-ordination is different, at least 120 co-ordinators are arranged, on this project, they will use fast horses, contact and data calculation, and then find out the most suitable construction method, and even sometimes, in a day or two, there will be thousands of laborers, adjust the location of the work, from one place, to another.

The whole railway, divided into more than a dozen sections, is carried out in an orderly manner, the efficiency is not low, originally, it may take 3 months to be able to build the completed railway, may not exceed 2 months, or even shorter, can be completed, such efficiency, very high.