The construction of Joaquin City is in full swing, the side of the Black Iron City is also in full swing, the huge construction wave from the Black Iron City to the Joaquin City, every place is like this, at the same time, with the advent of peace, the long-lost baby boom began to break out again, so that the population began to explode again, on the other hand, although the foothill city and the city of Picheng have lost some vitality because of the migration of the population, but with the high-tech of the Black Iron City into the foothills of the city and the city, they also began to be busy, the construction of roads, the laying of water conservancy facilities, all of which have put the development of the entire Black Iron City into the fast lane.

On the other hand, the establishment of two bazaars provides a good channel for the exchange of goods, first of all, the jade of Foothill City, these beautiful jadeite, for anyone, is a fatal temptation, especially the jade around Foothill City, its texture is very good, every piece of jade, almost all of them are high-grade gemstones, but in the past, only in Foothill City, there was no trade with other places at all, so these jades are only enjoyed by the nobles of Foothill City, and now, The establishment of the bazaar allows these jadeites to have a broader market, which will bring great development opportunities to the entire foothill city.

At the same time, it also brings huge foreign exchange income to the Black Iron City, and with this money, the Black Iron City has obtained a large amount of gold and silver from the Holy Alliance and the Guangyuan Kingdom, and there are all kinds of other minerals, such as tin ore and lead ore, which are not within the rule of the Black Iron City. Black Iron City undoubtedly has a great disadvantage, and through trade, they can naturally obtain a large amount of ore.

And the same is true for the Holy Alliance and Guangyuan Kingdom, the Black Iron City is very rich in copper and coal, which are also the raw materials needed by various forces, especially coal, which is the most important material before the industry puts aside oil, as long as it has a large amount of coal, it can generate electricity, and then lead mankind into the second industrial revolution, and in the land of the Holy Alliance and Guangyuan Kingdom, the amount of coal is very scarce, and it is a mode of digging holes, unlike Black Iron City, there is an open-pit coal mine, And it is very close to the Holy Alliance, as long as a road is built, they can transport each other, which will bring great help to the industrialization of the Holy Alliance.

This is naturally unfavorable for the Black Iron City, so the export of coal, which belongs to the controlled materials of the Black Iron City, every ton of coal export must be reported in the Black Iron City before it can be transported, which is also to avoid the Holy Alliance through the coal mines of the Black Iron City, so as to complete industrialization, when the Guangyuan Kingdom is not the opponent of the Holy Alliance, then the calculation of the Black Iron City will be completely in vain.

In the case of its own development, the Black Iron City will naturally not mess around at will, but the coal mine still has to be sold, after all, relying on jade alone This is always a small trade, the quantity is not large, after all, the mountain is so huge, but the number of jade is limited, each mining is only a few dozen, and the Black Iron City itself has to intercept a part, the rest can be sold, there is only a little, it is impossible to exchange for a lot of money, only coal mines, this kind of bulk trade of hundreds of tons at every turn, it is possible to create amazing wealth, In this way, the Black Iron City can complete the replacement of resources to accelerate today's industrialization.

For example, the production of stronger steel bars requires some rare ore materials, which are not available in the territory of Black Iron City, and these ores must be obtained from the Holy Alliance and Guangyuan Kingdom through trade, which greatly improves the hardness and flexibility of steel, and also makes roads and bridges have greater breakthroughs, especially in bridges.

Because of the shortage of building materials, and the hardness of steel is not high enough, almost all the bridges built in Black Iron City today are Dunqiao, that is, piers are set up under the bridge, and then the bridge is built, this construction method is the simplest, but it also has many shortcomings, first of all, the flood resistance is particularly poor.

Because the piers are placed directly on the riverbed, when the amount of water on the river increases greatly, these piers will bear the huge pressure of the river, and most of the cities in the Black Iron City, surrounded by lofty mountains, these mountainous boundaries, often at the turn of spring and summer every year, will break out very violent floods, even if it is a stone pier, will be washed away, and finally there are hundreds of bridges that need to be rebuilt every year, which is the biggest problem of Dunqiao.

The second is that there is great inconvenience to the navigation of ships, these piers because of the backwardness of construction technology, so the piers are also very secret, which leads to the fact that large ships can not pass at all, if you want to pass, you can only not build a bridge, in order to keep the channel unobstructed, but in this way, people's walking has become a big problem, so the two can hardly be carried out smoothly at the same time.

And in this regard, in the past, this may be nothing, because the territory of the Black Iron City is only the Black Iron City, and there are not too many materials to be transported, and sometimes it doesn't matter if you rely on each other's deployment, but now the Black Iron City has more than eight cities under its jurisdiction, with a population of more than 1.5 million, and the flow of resources and population has increased significantly.

At the same time, the Black Iron City also needs larger ships to transport goods, which requires the bridge to be changed, and in this regard, the expert group gave the opinion is to make a cable-stayed bridge, which is the most common kind of bridge in modern times, compared with the Dun Bridge, the most obvious advantage of the cable-stayed bridge is that it is no longer necessary to put the focus on the bridge pier, but on the cable, so that the flood will not cause any problems to the bridge itself, and the bridge can also allow the ship to navigate smoothly, which is crucial, but compared to the advantages, He also has disadvantages, that is, the technical difficulty is high, and the strength of the steel cable has very strong requirements.

After all, this steel cable has to cross the north and south, east and west, thousands of meters in length, all kinds of things on it will come and go, and at the same time to resist the invasion of strong winds, in this case, if there is no strong enough steel cable to support, it is impossible to succeed, so in this matter, experts have also thought of a lot of ways. Beanie boxes

At the same time, the Black Iron City also has an important advantage, that is, with the exploration of the surrounding area, many ancient ruins have been opened, and all kinds of books have appeared in the library of the Black Iron City in different forms, among which there are many ways about how people in the pastoral era built bridges and design processes, and how to match in the steel to be able to produce qualified steel cables, which are very difficult, and in engineering, it often involves the common use of multiple disciplines, In the end, through a year of research and exploration in Black Iron City, the steel rope production process of the Pastoral Era was finally reproduced, and what was missing was several important material elements, which were not available in Black Iron City, and there were many relics in the Holy Alliance and Guangyuan Kingdom, and the price was not expensive, because they had not yet discovered the high cost of these things.

Just like the Black Iron City is not particularly cherished for copper mines, after all, the main role of the copper mine in the Black Iron City is to use wires, but in the Holy Alliance, copper has more roles, such as the production of bullets, etc., and because of this, the Holy Alliance has placed a huge trade order to the Black Iron City since the establishment of the bazaar, buying copper ore, hundreds of tons, which is naturally a big deal for the Black Iron City, and it is also willing, after all, this copper mine covers the entire mountain range, and the copper ore reserves are conservatively estimated to exceed 40 million tonsIf the capacity of today's mining equipment is calculated, even if it breaks through the sky in a year, it is only 10,000 tons, then 40 million tons of ore production can and can be mined for 4,000 years, and there is no shortage of copper ore at all.

And the same is true for the Holy Alliance, those rare elements are of little use in their hands, and they can only be sold for a very limited price in their own country, while Black Iron City will buy in large quantities, and the price is not low, in this case, they are not exchanged, and the prosperity and trade of the bazaar gradually begins.

And with the exchange and acquisition of materials in the two bazaars, the construction of the Black Iron City will be more accelerated, and at this time, the winter has passed, and the sowing of the new year is about to begin, which is undoubtedly a very important link for the Black Iron City, the people take food as the sky, only if the stomach is not hungry, can they build their own homes, modern civilization is based on modern agriculture.

After the beginning of spring, Shu Han discussed with experts from the agricultural department and the experts of the chemical group about the production of chemical fertilizers, which are the greatest interests of human agricultural production in the future, he will be able to fill the lack of basic mineral elements in the farmland, so that the growth of plants can always be vigorous, and at the same time, more land can become fertile soil and increase food production, which is very important for today's Black Iron City.

With the end of the war, the advent of peace, the rise of trade, the expansion of land, a new round of baby boom brought more than 50,000 babies to the Black Iron City this winter, and also made the population of the Black Iron City break through the 1.6 million mark, and now the rapid development of the industry of the Black Iron City, coupled with the abolition of the hereditary system, the peasants have also been stripped from the land, and the industrialization of the city, a large number of factories need workers to work to help the development of the city, and the farmers are naturally pouring into the city in large numbers.

After all, there is water and electricity in the city, unlike the countryside, which is still a very backward natural life, and at the same time, the prosperity in the city is also what the villagers want to enjoy, and at the same time, the treatment of a worker in the city is higher than that of a farmer in the countryside, this is because the black iron city is now in urgent need of manpower and talents in industry, and vigorously develops industry, so it is naturally much better than farmers in terms of wages and treatment.

Especially after the establishment of the bazaar, the trade between the two sides allows the Black Iron City to sell its excess production capacity, in exchange for new resources and wealth, so that the major factories of the Black Iron City have naturally expanded, hoping to produce more equipment and products to meet the needs of customers, in this situation, a large number of farmers into the city, the city is getting bigger and bigger, while the rural population is getting smaller and smaller, to this day, the number of farmers in the entire Black Iron City is less than 1.1 million, This is still the result of adding the foothills and the city, and the population of the city is 500,000, which has reached a result of about 1 to 2.

This is very abnormal, put it in modern times, of course this is no problem, the United States farmers are only three million, but they can feed more than 300 million people in the country, and even can sell American agricultural products to the world, but that is a modern society, with a large number of fertilizers and agricultural production tools, to be able to support such a huge non-agricultural population, but in the current state of agriculture is still in the early stage of the industrial age, the ratio of one to one is already very dangerous, as long as a major flood, the grain depot of Black Iron City will bottom out, It is precisely because of this that the problem of food production is imminent.

And there are only two roads in front of the Black Iron City, the first is to stop industrialization and let the population return to the countryside, and the other is to establish a fertilizer industry and continue to move forward, and the first one is obviously impossible to get through, through these factories, the Black Iron City has obtained a lot of wealth from the hands of Guangyuan Kingdom and the Holy Alliance, and at the same time, the people of Black Iron City have also received a lot of benefits, using cheap goods, how can they give it up now.

But the second path is undoubtedly very difficult to follow, the first fertilizer used by humans is human and livestock manure, this kind of thing is the easiest to obtain, but again, their fertility is also very limited, and then the British found a large amount of bird droppings on a small island, which is an excellent raw material for fertilizer, and because of this resource, this country called Nauru was once rich for a while, until the bird droppings here were snatched up, and this miniature country was completely lost.

There is no such resource around the Black Iron City, and the second is indeed very far away from the ocean, so they can only skip these steps now, and directly reach the production process of the modern fertilizer factory, which is undoubtedly very difficult, the types of modern fertilizer are very complex, and there are different fertilizers for different lands, such as nitrogen, phosphorus and potassium fertilizers are independent, and there is a compound fertilizer, which is three kinds of fertilizers according to different terrain and soil quality for different proportions, as well as inorganic fertilizers and micro fertilizers and other varieties. What Shuhan wants is the simplest nitrogen, phosphorus and potassium fertilizer, which is the most basic element of agricultural production, but also the most difficult step.

Phosphate fertilizer comes from the reaction of phosphate rock and sulfuric acid, sulfuric acid Black Iron City does have it in the sphere of influence, in the Picheng area has its raw materials, can be matched to make, phosphate rock is relatively difficult, can only be imported from Guangyuan country, the price is very high, because Guangyuan country itself has phosphate fertilizer, they obviously know where the value of this ore is, which makes Black Iron City have no chance to deceive, can only endure the high price to buy.