Before Zhao Xin's arrival, Ding Haijun was just a small island by the sea, and if it weren't for Zhao Xin's arrival, this place would be poor forever.

It's not that Zhao Xin overestimated his ability, the current Northern Song Dynasty, brilliant and developed, will always only have a canal as the core system, and even a small part of the area centered on the four capitals of the Northern Song Dynasty can be called the core area of Gyeonggi.

The rise of Jiangnan, an area with Jiangning Mansion as the core, is also very prosperous, but in the era when many famous ministers in the Northern Song Dynasty had not yet gone south, the development of Jiangnan was relatively slow.

That's right, the competition between the reformers and the conservatives has made many famous ministers be degraded to the south, and these famous ministers have created a different Jiangnan, whether it is Wang Anshi's dormant Jiangning Mansion for many years, or Su Shi's Su Causeway, Dongpo Meat, these historical ministers, were expelled from the center, but took root in Jiangnan, and their efforts made Jiangnan begin to enter a period of rapid development.

Prior to this, the development was relatively slow, and even the wind and rain were smooth, and the riverbank, which was the pillar of grain production in the entire Northern Song Dynasty, was still so, not to mention an island by the sea, in the transportation environment of the Northern Song Dynasty, dozens of miles away from the shore, which was a problem.

The area formed by the typhoon is mostly between 5 degrees and 20 degrees in the dimension, more than 20 degrees, although there are, but there are very few, which is mainly related to the mechanism of the formation of the typhoon, 50 meters underwater, the temperature of the sea water does not reach 26 degrees, it does not have the characteristics of the formation of typhoons, and the temperature in the north drops sharply, and it has lost such a foundation.

But this era, not the 21st century, ships can withstand powerful typhoons, this era of Chinese-style sailing ships, not to mention the center of the maximum wind force of more than 12 typhoons, that is a 10,000-ton giant ship, can not cross the strong wind, even if it is more than six or seven winds, are easy to cause problems.

Ding Navy, located in the north of China, without any shelter, not to mention perennial winds, most of the time there are considerable winds, if there is no way, these fishermen, will not choose to live here, when Zhao Xin arrived in Ding Navy, Ding Navy almost every household, there are people dying at sea.

The sea is rich, but for fishermen without tools, it is terrible, the Northern Song Dynasty of China, the shipbuilding industry has flourished to a peak, the shipbuilding industry of the Northern Song Dynasty, has the world's most pinnacle shipbuilding, the ships of the Northern Song Dynasty, widely sailed throughout Asia, even including the waters of northern Africa.

But for the fishermen at the bottom, the boat is always a difficult object to solve.

In the shipyard, to build an ordinary boat, even if it is just a 200 stone river boat, it takes capital, which may exceed 150 yuan, with the purchasing power of the Northern Song Dynasty, this is equivalent to the price of a dozen cows and a dozen acres of fertile land, which is not something that ordinary fishermen can give.

In the Northern Song Dynasty, the shipbuilding industry flourished, whether it was the developed river transportation or the huge orders from maritime merchants, so that the shipyards in the south of the Yangtze River made a lot of money, and the needs of fishermen were not taken into account at all.

In fact, across the whole world, that is, in the late 20th century, with the gradual decline of ocean shipping, the gradual rise of marine fishing, which gave birth to a large number of high-end fishing vessels.

Prior to this, fishing boats were an important aspect of the world's shipbuilding history, not to mention that fishermen could only struggle with poverty compared to merchants.

Unreliable boats must bring increased danger and fishing efficiency, which will make most of the fishermen live below the food and clothing line, maybe lucky, get some benefits, but more are struggling, once they encounter something or change, they have to gamble luck.

With a windsurfing board or a canoe, the chances of success are almost negligible, but once they fail, these boats will not come back.

If Zhao Xin does not choose Ding Haijun, Ding Haijun will continue like this, living by the sea with difficulty, and will not die, but the pain of losing relatives will continue, and now, the appearance of Ding Haijun has changed the fate of the entire Northern Song Dynasty, and the direct beneficiaries are these original Ding Navy fishermen.

In Dingjunjun, not only did they get a good settlement, but their dilapidated houses and fishing boats were all properly housed.

Perhaps, for others, these local residents are not important at all, but for the people, but for Zhao Xin, he needs them to introduce something, especially the familiar fishermen, they may not know much about the depths of the ocean, but they know very well about the surroundings of Ding Haijun.

It was under their leadership that the Ding Navy took less than three months to determine the location of the three ports.

On the surface of the sea, it can be determined by measurement, these mountains on the ground and the like, are clear at a glance, but underwater, it is not a simple measurement can be determined, in the 11th century, when the diving equipment was not very sound, in the era when various hydrology and underwater conditions were not recorded, the choice of a port, let alone 3 months, 3 years is not much.

Zhao Xin spent 300,000 yuan to resettle hundreds of residents, with an average of more than 500 yuan per family.

With 500 guan, in exchange for a broken house by the sea, a canoe, and maybe a few acres of thin land reclaimed on the barren land, in this era of the Northern Song Island, there are very few people who can really open up fields, even if it is a large island of more than 300 square kilometers like Ding Haijun.

With an incredible price, in exchange for time savings, what is more familiar with the island than the fishermen on the seaside, maybe these fishermen, do not know the situation of these oceans, what it represents, but Ding Haijun knows, Zhao Xin knows, with the help of these first-hand hydrological data, Ding Navy's construction plan, I don't know how much it has been improved, it only took 3 months to determine the basic construction, and build a large number of buildings.

In addition to hydrology, there is also a map of the entire Ding Navy, such a river was found with the help of the original inhabitants of the Ding Navy.

Some people will ask, such an obvious river, Zhao Xin and their surveyors will not be able to see it, but in fact, this river is a seasonal river.

In the summer, the water is very large, and at its peak, it can even flood outward, but in the winter, during the dry season, most places dry up unless the sea is backing up.

Even if they came to the Ding Navy to investigate, the surveyors sent by Zhao Xin traveled every inch of the Ding Navy's more than 300 square kilometers, but they were not familiar with this river.

Of course, it has something to do with the time of Ding's investigation, if it takes more than a year, it will definitely be able to discover this river.

In the rainy season, the precipitation of the Ding Navy is still quite large, and even in some rainstorm seasons, the water volume of this river will dilute the seawater, so that the river channel will become fresh water, and replenish the groundwater of the entire Ding Navy.

As an island, groundwater is very important, even if it is only a dozen miles away from the shore, or even a few miles, the problem of sea transportation will make the underdeveloped water transportation feel difficult, if the Ding Navy does not have enough fresh water, it will not be able to support a city of millions of people.

People can live for 7 days without food, but if they don't have water, it is 3 days at most, and compared with food, human beings have a greater need for water, simply to sustain life, as well as clean, industrial and other aspects of water.

The river that the investigators found was only less than 5 kilometers long, formed by the inflow of seawater, and compared to the 15 kilometers of the river, this value is completely different.

With the help of the aborigines of the Ding Navy, this was discovered, especially the intermittent rivers with insufficient water, and the entire canal excavation scheme, must have been different.

On an island of more than 300 square kilometers, the circumference is only a few tens of kilometers, and the diameter of the road is only a few tens of kilometers, and a river of about 15 kilometers is quite long on the premise of dividing half of the central mountain range.

In summer, the humid air from above the ocean will bring a lot of rain to the Ding Navy, abundant rainfall, most of the river channel is only one meter wide, and it will definitely not be able to support the task of shipbuilding base, which is no problem for Zhao Xin, under the premise of having large construction tools and a large number of manpower, the Ding Navy has carried out expansive excavation of the river.

In the middle, it is necessary to take into account the sea water, and the only way to position the height of the canal below sea level is to let the sea water act as the canal, so as to ensure that the canal has enough water.

This is crucial, and an important element of intermittent rivers is that during the dry season, the amount of water decreases, and if it is not laid out in advance, the waterway will not be able to support the huge waterway.

Of course, if you simply build a shipbuilding base, 5 kilometers is about the same, after all, in the ordinary season, you can also ensure about 5 kilometers of water, but once this canal is expanded, it will not work if it is not deep enough.

It is a series of work that has been done in advance, and the understanding of the Ding Navy is very in-depth, and everything has gone smoothly for such a huge project from the very beginning.

This river is very short, even if the whole whole process is done, only about 15 kilometers, the excavation of this river is very convenient, the Dinghai Navy has a large number of labor, these laborers with the help of machinery, the efficiency is amazing, it took less than half a year to dredge all the river.

As an offshore island, the bottom of the Dinghai Sea is stony, but the upper layer is formed under the long-term alluvium, mostly soil layer, and less hard soil layer, so that even ordinary tools can dig the river channel, which saves a lot of labor.

If it was all stony, then the difficulty of construction would increase significantly, and Ding Haijun had solved the problem of explosives, perfect black powder had been completed, and even more powerful explosives with more nitride had been added.

Even if it is a stony mountain, it can be exploded, but the labor force of the mountain gravel has been significantly improved, even if it has explosives, large-scale blasting will bring hidden dangers, and the impact force generated by the explosion will have much damage to the stone, which is a key study in the 21st century, not to mention the Northern Song Dynasty in the 11th century.

On the contrary, it is soil, which is not difficult to excavate, and the excavated soil can also be filled in some low-lying places inside, which can be said to kill two birds with one stone.

This canal, Zhao Xin has high hopes for here, this very simple river, but according to the high standard of the canal to dig, this river channel has been excavated to about 90 meters, the depth of up to 11 meters, so that this river is truly reborn, with the ability to dock ocean-going vessels.

It doesn't sound like a big number, but in fact, it's a very scary number, and there is an analogy canal, that is, the Kiel Canal in Germany, which in the early 20th century did not exceed this number.

At the beginning of the 20th century, it was the time of the First World War, whether it was on land, many guns of more than 500 mm, or in the ocean, more than 20,000 tons of powerful warships, based on war, all kinds of science and technology have developed to the peak of this era.

Not to mention the 10,000-ton battleship and super dreadnought, even the smallest frigate was invincible in the 11th century, even in the Age of Discovery.

After the restoration, in order to ensure the super fearless access, the Kiel Canal at that time was only 44 meters wide and 11 meters deep, and later, throughout the 20th century, and even in the 21st century, after several repairs and repairs, the average depth of the Kiel Canal was 11 meters, and the narrowest width was only 102.5 meters.

Now, in the 11th century, the Ding Navy was able to build such a canal, and it was still super deep.

China's feudal dynasty, the history of digging canals, as early as many years ago, carried out, not to mention 600 BC, the Chu State in order to dominate the Central Plains and open the Ling Canal, let's say the Qin State Zheng State Canal, hundreds of years, the Warring States powers dug a large number of canals.

Needless to say, the entire Beijing-Hangzhou Grand Canal is the core canal of the Northern Song Dynasty, and without the five major river systems supported by the Beijing-Hangzhou Grand Canal, the commerce of the Northern Song Dynasty would not be able to develop.

It seems that the Northern Song Dynasty did not dig a large number of canals, but some small repairs, for example, dredging the narrower parts of the river, dredging the original abandoned canals, plus the maintenance of the entire Beijing-Hangzhou Grand Canal, this is probably no worse than digging a new canal.

But even the Beijing-Hangzhou Grand Canal, which is an important river that runs through the north and south of the Northern Song Dynasty after dredging, his average water depth is not very deep, and the characteristics of Chinese-style sailing ships make his water holding capacity very shallow, even if it is a 30,000-material sea boat, their draft is only a few meters, which cannot be compared with the terrible sea ships of later generations.

The depth of 11 meters is still 11 meters below the water level, which is equivalent to adding a certain amount of work on the basis of the original workload, especially the deeper into the Ding Navy, the more so, but for the sake of future considerations, this increased workload is only a matter of the length of the construction period.