The harvest of whaling, in a sense, increased the meat intake of the Dinghai Navy, and similarly, Xue Yu also discovered that in the eastern part of the Ryukyus, there will be whales, which is much closer than Zhao Xin said, located in the north of Japan, the largest island, he has not been to Hokkaido, and he does not know how easy it is to meet fish in Hokkaido, so he naturally thinks that it is easy to find whales on this route.

The characteristics of whales, in the summer, will go to the north to hunt, and accumulate fat, in the winter, will go to the tropics to overwinter, this natural characteristic, so that the whale's activities are very regular, as long as you find the route of the whale's activities, it is not difficult to catch them.

This is also Zhao Xin's negligence, he just knew that he and Japan have the habit of catching whales, but he didn't know that whales have the characteristics of cruising, in fact, in the eastern part of the Ryukyus, this itself is a whale cruising route, and this is the most suitable place to catch whales, so you don't have to go to Hokkaido.

Up to now, the Ding Navy has popularized Western-style sailing ships, not to mention going to Japan, even if it is going to the Americas, there is a certain chance, but from the Ding Navy to Japan, more than 3,000 kilometers of sailing, especially in most moments, or in a relatively deep ocean, this is a huge problem.

Even if there is a sextant, even if it is a Western-style sailing ship, their seaworthiness is very good, and under this premise, the voyage of 3000 kilometers is very difficult and may be dangerous.

In the Dinghai to the east, to the Ryukyus to the east of this part of the route, the nearest resistance, the distance of the Dinghai, that is, about 500 kilometers, the farthest resistance, is not more than 1,200 kilometers, this distance, compared to the distance of more than 3,000 kilometers in Hokkaido, I don't know how much closer, in this case, the efficiency of fishing has improved a lot. ，

A whale, at least about 15 tons, which is equivalent to the weight of 30 cows, and whales do not live alone, in general, the minimum number of whales is 5, the most, more than 300, as long as a whale is found, this number can be guaranteed, which is very complementary to the Dinghai Navy.

Before large-scale farming became a common thing, whaling became the best way to replenish the right meat, and similarly, the emergence of a large amount of whale oil also improved the entire industry of the Dinghai Navy.

The improvement of industry is inseparable from all kinds of machinery, with steel as the main body, the construction of the industrial system, lubricating oil may not be the most important thing, but it is also a very important thing, especially under the premise of high temperature and high speed, there is no enough suitable lubricating oil, to a certain extent, it will reduce the efficiency of the industry, which will increase the cost.

Zhao Xin is not an engineering student, and does not know what all kinds of lubricating oil look like, can only rely on animals, or plant fat, these things, perhaps in a simple mechanical environment, some effects, once encountered, animal fat will melt, lose its own object characteristics, vegetable fat is even more so, in vegetable fat, it is difficult to do the role of lubrication, the appearance of whale fat, fill this gap.

Not only under the premise of high temperature and high speed, his performance has been greatly improved, but the number of the same use is also decreasing, which improves the overall effect of the Ding Navy.

Perhaps, on the whole, this effect is not much, probably between 5% and 15%, but with the navy, it is a very terrible base, and the overall improvement is very terrible.

Whaling can not only improve the cooperation of the navy, but also for the intake of navy protein, which is quite crucial, and the protein of the navy is gradually balanced, and the income is also quite expensive.

Under the premise of large-scale whaling in the Dinghai Navy, the various meats of the Dinghai Navy have changed from single to diverse, but no matter how the whale is said, it is only a mammal, and there is still a huge difference between him and those animals on the surface, they may be able to replace meat in a short time, but it is impossible to replace meat in a long time.

In the Northern Song Dynasty, the acquisition of meat, in addition to all kinds of pork, poultry, there are only all kinds of meat produced in the northwest, in fact, with the help of the Dinghai Navy, a large number of grasslands in the northwest, when feeding cattle and sheep, from free-range, to captivity, to a certain extent, the unit of grassland, can accommodate animals, increased by more than 10 times, the same, after reducing the activities of animals, the accumulation of fat is also increasing.

But what is the use of this increase, even now, in the entire Hetao Basin, the output of various animals and plants has increased to a very terrible level, compared with the time of the Western Xia, at least 3 times more, not to mention the degree of cattle and horses for the Northern Song Dynasty's agricultural promotion, just say that simple meat, for the Northern Song Dynasty is very great.

At present, the price of beef and mutton has been reduced by at least 30% in Bianliang, Tokyo, which means that the supply will increase considerably.

It's a pity that for Dingjun, not to mention increasing the supply of beef and mutton by 30%, even if it is doubled, it is a drop in the bucket for Dingjun.

The situation of transportation, not to mention the Navy, even for the Northwest, is a huge problem, reasonable breeding technology, so that the Northwest aquaculture industry to improve the rate is quite high, but unfortunately the consumption is quite small, this year, the supply of meat has increased by more than 3 times, but from the Northwest to transport out, or the same as before, that is, these growth, left in the Northwest.

In the Hetao Basin, even if the number of grasslands is quite large, the total amount is limited, and it is still acceptable under the premise of increasing by 3 times, but in the future, once the effect of this improvement continues to improve, it will inevitably reach the limit.

Under the premise of not having a variety of feed, the whole grassland, even if it is used in captivity, the range of improvement is still limited, similar to earthworms and microorganisms, can increase the total amount, but it is impossible to improve more, if this problem is not solved, once it reaches a limit, even if it takes more effort, the overall breeding volume, will not be greatly improved.

However, there is a good point that the current railway is being connected at a rapid pace.

Because of the relationship of the Northern Expedition, the level of Hangu Pass has been neglected, and even the dark clouds have been taken under the premise that a level that has been abandoned has what kind of role does it have.

For the Northern Song Dynasty, under the premise that the Western Xia had essentially perished, the historical checkpoint of Hangu Pass had no actual effect.

According to Hangu, and sweeping Liuhe, this is what the Qin State did thousands of years ago, or even 1300 years ago, a Hangu Pass, almost supported most of the defense line of the Qin State.

But now, even the Guanzhong Plain has declined, and now, the core of the entire Northern Song Dynasty is Henan, Hubei and Hunan, and even the middle and lower reaches of the Yangtze River have become an important grain producing area in the Northern Song Dynasty, and the Guanzhong Plain has become a burden and a burden.

It's just to demolish Hangu Pass, not to tear down the city wall, what's the problem.

The whole railway from Bianliang to the northwest, a key checkpoint, is Hangu Pass, east of Hangu Pass, this is the Central Plains Plain, this plain, there are few mountain ranges to block, even if there are mountains, if a little if you can pass, in the west of this mountain range, that is the Guanzhong Plain and the Hetao Basin, these places, are not famous for mountain ranges.

For this railway, the Dinghai Navy not only sent at least 40 construction teams, a total of more than 20,000 people, but also supplied most of the materials.

Sleeper gravel, these can be taken from local materials, as long as the selection is arbitrary, in the mountains and forests, there is a large amount of wood, in some ordinary places, can also quarry, perhaps for the former Northern Song Dynasty, quarrying is a technical work, from the mountains, the collected boulders, will become a part of the garden, but under the premise that the Dinghai Navy provides a large number of explosives, as long as the explosive point is installed, these gravel can be seen everywhere.

The railway from the northwest to Bianliang, at best, is about 2,500 miles, which is eight times more than the railway from Bianliang to Yingtianfu, but the Dinghai Navy provides more personnel, 40 groups, each group is at least 500 people, and a large number of machinery under the premise, a bid section, but about 50 miles, which is not the distance of a factory in the railway construction.

With the foundation of the previous Southeast Railway, the current railway construction speed is very fast, a few months, at least half of the construction has been completed, it is expected that in about a year, most of the construction can be completed, which is a good thing for the Northwest Railway, and now the restriction of the opening of the railway, is Hanguguan.

It is very easy to demolish Hangu Pass, under the premise of having explosives, even if it blows up a mountain, it may only take a few months, not to mention, under the premise of the original and existing valleys, open a road.

However, this passage is not an ordinary opening, in the valley, it is not completely flat, he has a certain slope, to ensure the efficiency of transportation, it must be set reasonably.

This is the key problem that restricts the efficiency of the Northwest Railway, if it is a flat passage, as long as the cement road is repaired appropriately, it is relatively flat, this is fine, but unfortunately this is a valley.

In the design, after the Hangu Pass was demolished, it was necessary to build a road with a minimum length of 30 kilometers according to the slope, and this road had a difference of 300 meters above sea level.

It doesn't sound like much, 30 kilometers of road, 300 meters above sea level, an average of 1 meter per kilometer, this slope is not very high, but unfortunately in Hangu Pass, the drop of this slope is concentrated in a distance of less than 3 kilometers, with an average drop of up to 100 meters per kilometer, which is a very difficult problem for clothes moths to solve for highways.

To set up reasonably, even in a certain place, choose the degree of vertical hoisting, increase the overall efficiency, which has become the focus, choose which place to place, reduce the entire vertical distance, has become the most critical place.

Now, in the west of the original Hangu Pass, at least 2 miles, this place is arranged, with a vertical distance of more than 120 meters, which solves the problem of most of the vertical height of Hangu Pass, and in other places, the overall vertical height is only 180 meters, and can be buffered by a minimum distance of 20 miles, each mile is only about 9 meters, which greatly solves the problem.

In the Northwest Railway, the final problem, the biggest problem of construction, in fact, that is, here in Hanguguan, when the setting of this vertical take-off and landing of more than 120 meters is completed, and 8,000 to 10,000 tons of materials can be processed every day, the entire Northwest Railway, there will be no problems.

Although the current railway only leads to Hangu Pass, and even says that the railway currently in operation is only a part of it from Bianliang to Yingtianfu, it does not delay other people from seeing the benefits of the railway.

The more than 300-mile-long railway, after being tested, was put into operation, and at the beginning, there was no passenger line, which was relatively more demanding.

However, the freight line has been very terrible, at the beginning, this route, just to help the Bianhe River diversion, but with the gradual increase in transportation volume, the increase in efficiency, this route has taken on a huge role, more than 5 times the Bianhe River, and even the Bianhe River from the leading route, into an auxiliary.

Under the premise of the continuous increase in the capacity of the railway, in response to the echo of a large number of people, the passenger transportation of this railway, and once opened, it showed a terrible effect. ，

What is Bianliang, it is the capital of the entire Northern Song Dynasty, gathering more than one million people, and there are a large number of floating population, compared to farming, going to Bianliang to do some odd jobs, are more profitable than farming.

What is the place of Yingtianfu, it is Nanjing, it is one of the most important places in the entire Northern Song Dynasty in addition to Bianliang and the Daimyo's Mansion, this place and Bianliang naturally have a lot of contacts, whether it is normal exchanges, or some other exchanges are very much.

At first, only 3 trains were opened, each train about 300 people, but this number was not enough, and then it was increased to 7 trains, 10 trains, and finally 20 trains per day. ，

These trains were only opened between freight cars, but they created huge benefits, plus the benefits of freight, the data of the three divisions, and the final monthly income exceeded 300,000.

This is a terrible number, you know, the entire 300-mile-long road, the overall investment, between 6 million and 7 million, even if you add the cost of expropriating land, it will not exceed 10 million, 300,000 per month, which means that about 35 months, you can recover the overall investment, this less than 3 years, the rate of return, is very high.

Now the most popular usury in the Northern Song Dynasty, their income is only this number, there is a limit, and even there is a situation where it cannot be recovered, but the railway can guarantee this, suddenly, countless people have invested in the railway investment, through all aspects of the relationship, the construction of a new railway.