The fall of Western Xia naturally brought the best results, the pressure of the Northern Song Dynasty was empty, three countries, and two countries, this is a different political situation, at least speaking, the pressure on the direct army has been reduced.

The aggressiveness of the Liao State was not as strong as that of the Western Xia, and in this case, the reduction of military expenditures alone would allow the Northern Song Dynasty to gain a lot of benefits.

Han Qi is an excellent politician, at this moment, all his actions are better for the Northern Song Dynasty, whether it is attacking Xingqing Mansion, or annihilating 30,000 iron harriers, as well as dealing with Liao Xingzong's anger, not only successfully stopped the war, but also made Liao Xingzong agree to very good contract conditions,

From this discussion, it can be seen that the Liao State actually made huge profits in Western Xia, otherwise, it would not have taken out nearly 10 million head of cattle as a condition for trading.

The income of this time alone is enough to support the construction of a busy road, not to mention how much income will be generated in the future when Western Xia is taken over by the Liao State, which is also the fundamental reason why Zhao Xin left the Dinghai Navy.

Now the Dinghai Navy, in fact, cannot be separated from Zhao Xin's influence, and it can even be said that after Zhao Xin leaves, the development of the Dinghai Navy will inevitably be delayed.

One of the most important parts, is the development of the Navy, which is almost crowded.

According to the original plan, after all aspects have been smoothed out, and even the blacksmith factory has been regularized, the development of the sea is the only option.

The focus of the sea, in this era, is not steel, but the structure and performance of sea ships, far from the development to the limit, Zhao Xin is not an expert in this area, but in the information age of the 21st century, even if he does not focus on care, he knows some, not to mention, he has always liked cold weapons, and he has almost naturally paid attention to the era of galleons.

Advanced sea vessels, he already has a prototype, as long as he finds the right shipwright, makes an attempt in this regard, time will solve the problem.

The smelter also produces enough suitable steel for all kinds of steel, and even has nitric acid, the most important raw material in the military industry.

As long as there is considerable time, research is made, and appropriate adjustments are made, and it is no longer a problem to get into thermal weapons.

But Zhao Xin can't be in a hurry, there is an obvious difference between thermal weapons and other weapons, that is, the power is huge, and when there is not enough self-protection and control ability, rash intervention will only make things worse and worse.

In the face of the already quite developed shipbuilding industry in the Northern Song Dynasty, it was not easy to propose amendments, and Zhao Xin could only do it step by step.

In fact, he was already thinking about this aspect, making preparations, and in the smelter, the latest task assigned to Niu Dali was to study the keel of the ship, replace the wooden keel with steel, and use the forging method to make the ship have a steel skeleton.

One of the fundamental reasons for restricting a big ship is that the keel, a huge tree, is the foundation of a ship, and no matter how tall the tree is, a huge ship can be made.

After China developed a combined keel, it solved the limitation that every ship must use a huge tree, so that the entire shipbuilding industry began to develop to a larger extent, from the large-scale Chinese ships of the Northern Song Dynasty to the large ships of the Ming Dynasty, which were all in the navigation industry, reaching a new peak.

The iron smelting industry is not good, and the steel keel does not appear, even if it is Zheng He's sea ship, a giant sea ship with more than 40,000 materials, and the wooden keel is used, under the work of master craftsmen, it is finally spliced and formed.

The larger the ship, the higher the requirements for the keel, even if it is the use of splicing technology, large treasure ships, if there are too many splicing, it is not very suitable, which restricts the tonnage of sea ships to a certain extent.

It was not until the advent of iron keels and steel keels that the problem was solved.

Now, because of the emergence of Zhao Xin, a traverser, the Northern Song Dynasty has entered the age of steel in advance.

Compared with the wood that can be grown in decades or even centuries, steel is the easiest to form, and the performance is more outstanding, it can withstand the invasion of the stormy waves above the sea, and will not disintegrate in the storm.

The quality of the keel, directly determines the anti-sinking performance of the whole ship, splicing the keel, disintegrated in the wind and waves, became in ancient times, one of the reasons why it is most prone to shipwreck, when nature with infinite power, when the ship is attacked, the combined keel often can not withstand this huge force, and break, and finally disintegrate.

If Zhao Xin is not afraid of running too fast, he may pull the egg, maybe, he will go directly to the all-steel ship, but this must be a direction in the future, the reason why the ship can float on the water is because of the overall specific gravity, which is also the fundamental reason why the steel can float on the water, buoyancy, is the key.

It is expected that in the fifth year of Qingli, the first one that has been refitted and has the posture of an ocean-going ship will appear, and a series of improvements will be made, and everything has changed after the changes in the Western Xia.

The railway, which itself was a little further behind, had to be advanced, and the changes in the Western Xia were enough to affect the entire Northern Song Dynasty, even if it was for the Northern Song Dynasty not to lose its interests and to ensure that it was gradually improving, Zhao Xin had to take a step.

It stands to reason that if Zhao Xin's goal was to take control of the entire Northern Song Dynasty, then weakening the Northern Song Dynasty was the best choice, because it would reduce obstacles for the future.

But Zhao Xin's goal is even greater, it is for the rise of the entire nation and race, the stronger the Northern Song Dynasty, the more wealth it produces, the better the foundation for the future, as for resistance, when thermal weapons sweep everything, when all the powerful countries around are taken down, the wise Northern Song Dynasty courtiers will make the right choice.

The sudden shift in goals has brought about many changes, and the production of marine steel that it has invested in has been reduced to the research of keels, and the rest has been fully invested in the production of rails.

1,000 kilometers of railway, the huge amount of steel used, plus the ancillary spare parts, means that the naval smelter is able to provide such a terrible output.

When the output does not explode, it is always the output of steel that restricts the speed of railway construction.

Through this railway, increase the control of Longxi, and even the future Western Regions, and gradually encroach in the future, after taking the Hetao Plain, relying solely on the Hetao Plain, the Northern Song Dynasty can attack and retreat and defend.

On the other hand, under the premise of reaching a 10 million or even more livestock deal with Liao, this railway will have the possibility of construction and will receive huge support.

Although money cannot solve all problems, it can solve most problems, and some of the resistance that may be encountered will no longer exist in the face of great value and profit.

Cattle and horses and other livestock are the greatest interests, perhaps, when the Northern Song Dynasty, all kinds of livestock are saturated, it will reduce profits, but in the early stage, at least in the first 10 years, the Northern Song Dynasty can bear at least more than 30 million head of livestock.

There are many things to deal with in the construction of a land and a lot, and as long as there is a major premise, everything is not a problem, and that is continuous trading.

Zhao Xin received an official notice about 10 days later, allowing him to go to Bianliang, Tokyo, but some rules, as well as rituals and the like, must also be followed, since he became the Marquis of Dinghai, he is no longer the prince, and everything that was the prince before no longer exists.

In 10 days, Zhao Xin settled down some necessary things, and the navy has formed a fast-paced work system, but there are still a lot of things that need to be paid attention to every day, and there will inevitably be a problem of repetition and efficiency decline, which is an inevitable problem, and there is no way.

Of course, Zhao Xin can't have the luxury of expecting that after leaving him, the Dinghai Navy can still operate very well, and it is good to be able to maintain a certain efficiency, and the only good news now is that the shipbuilding industry and the navigation industry have not yet been opened, but they are only in a small range of temptations, otherwise, the waste will be even greater.

Those who are already ready, don't need to carry many things, just bring Sun Ji and some personal guards, of course, it's not good to give gifts to Renzong and the concubine, these new products of the Dinghai Navy, almost every once in a while, there are many products coming out, these products are basically marketed throughout the Northern Song Dynasty.

What Zhao Xin came up with is more new products that have not come out, these novelty things will become new products and profitable machines for the entire Dinghai Navy in the future.

However, when he was about to leave, a six-hundred-mile urgency sent a secret letter, and when Zhao Xin read it, he was a little silent.

This letter came from Renzong, but it was not through official channels, but from the source.

Zhao Xin applied to enter Bianliang from the official channel, perhaps at the beginning, Dongfu was afraid of attracting Renzong's attention, so he would not inform Renzong, and in the end, when the dust settled, when Zhao Xin was notified, it was almost certain that Renzong would be informed.

After Renzong knew about it, he was silent for a long time, such a son was his concern, let alone such an excellent son, an iron material was like a stroke of genius, which solved the financial problems of the entire Northern Song Dynasty in one fell swoop, and he also gained huge benefits.

But this son had to become the Marquis of Dinghai, broke away from the identity of the clan, and existed as the identity of the Miao family, which is not a painful thing.

In the past, he could only listen to the news, and the letter sent back by Zhao Xin to know the news of Zhao Xin, but now that Zhao Xin is going to return to Bianliang, can he see him, of course, Renzong used a tactful tone, Miao Guifei misses him and wants to meet.