North Korea and Japan, their populations are quite large, and the mainstream culture in the whole society is also to learn Chinese, and Chinese writing and language are very popular among them.

Among the mainstream royal families and officials, almost the vast majority are learning Chinese, and some can even speak Chinese fluently, which avoids time for assimilation and language learning.

It's just that if you want to fight, you need to use the army, whether it is North Korea or Japan, their land area is not very large, but the environment is relatively harsh, which is also the foundation of their ability to preserve.

The Dinghai Navy has a strong maritime transport capacity and can transport a large number of troops to the island, which is not a problem, the key is the continuous role, which requires careful consideration.

If you want to plunder the population, on the one hand, there must be a lot of people who go, and in any case, Japan and Korea are also not small places, and it is impossible to really occupy them without 500,000 people in each country.

Now, the Dinghai Navy is spread out big enough, whether it is in the northeast, or in the future in North Korea and Japan, people are needed, and this has formed a contradiction.

At present, the Dinghai Navy can only take its time, on the one hand, speed up the construction of the Northeast, lay the foundation of the northeast's cities, and establish a certain number of cities in Inner Mongolia to ensure that there is a place to accommodate the future population after it is injected.

On the other hand, they will land in Japan and Korea, first choose their most populous cities, give them a moment, plunder as much as they can, and then they can only take their time.

Zhao Xin also has no way, population, from the moment the Dinghai Navy was established, is a huge problem, it seems that the Dinghai has never felt that the population is enough since the development of the Dinghai Navy for so long.

Perhaps, this is also the reason why the development of the Dinghai Navy is too fast, from the development of the Dinghai Navy to the present, it has only gone through four years, which is too short.

Plunder, can only get the basic labor force, if you want them to be recognized, and integrate into the society of the Dingjun, there is not a long time, don't think, some things of the nation are not so easy to dissolve, unless Zhao Xin raises the butcher's knife.

Knowing the benefits of the population to the future, Zhao Xin will not easily raise the butcher's knife, if he can, he will be reformed, if he can't, he will be used as a slave, even if he does not approve of it, he can play their role.

Among the many ways to increase the population, the simplest, and the surest way to obtain the population, is actually to have children.

Don't underestimate this, the world has developed for so long, and primitive societies have gone from millions of people around the world, or even one or twenty million people, to now, more than 100 million people, and the source is fertility.

As long as there is no war, as long as there is enough food, the natural growth rate is the foundation of population growth.

Before Dinghai, the population was obtained in the Northern Song Dynasty, in order to increase the population of Dinghai itself, and also to obtain a sufficient number of populations.

In feudal society, and even earlier civilizations, people did not consider the problem of natural growth rate, and even large-scale censuses and censuses of acres of land would be lonely and deep, for the simple reason that this involved interests, great interests.

Population is a productive resource, and the big landlords, the big nobles, if they want to obtain great wealth, if they want to complete the accumulation, they can't do it without the population.

The state often collects taxes on the basis of population, at first it was just some people who could not pay, and became recluses, and later, the big nobles, the big landowners, found the loopholes in it and began to hide the population, a large number of slaves and uses, which is their foundation.

The same is true of land, and even in the days when scholars and officials were exempt from taxes, hiding land was common.

The reason for this is very simple, benefits, people can create value, and land can continue to generate benefits, which is the key.

A lot of reforms, in fact, are also such a game, to free people and land, and only in this way can the problems of the dynasty be solved. However, that kind of solution only treats the symptoms but not the root cause.

The frontispiece of the Romance of the Three Kingdoms, the general trend of the world will be divided for a long time, and it will be divided for a long time, this sentence is not wrong at all, it is based on the history of China, in the middle, there may be some coincidences, but there are also some inevitables.

For example, China's population has been oscillating between 10 million and 20 million to nearly 100 million, in the middle, before the Tang Dynasty was 50 million, in the Song Dynasty approached and exceeded 100 million, and in the Ming and Qing dynasties it was 2 or 300 million.

In the middle, to put it bluntly, it is the increase in land output, which has been relatively stable before, from the Han to the Tang and then to the Song Dynasty, the increase of land, the increase of cultivation technology, and the slow rise.

When the apex, or rather, the apex, is reached, because of the annexation of land, so that ordinary people do not have access to land, and there is no ability to deal with risks, it is almost natural that there will be turmoil, and with the help of disasters or external factors, a dynasty will be overthrown.

The last days of the dynasty are almost the most miserable, the war will always only destroy and not build, in the years of war, almost kill people, and the great rule after the chaos is also said.

The improvement of the Ming and Qing dynasties was not the cultivation technology, but the high-yielding South American crops such as sweet potatoes and potatoes entered China, and then were popularized on a large scale, and under the Chinese farming technology, they were finally planted and obtained excessive output.

With ordinary rice and wheat, it is already the limit to be able to reach 500 catties, while potatoes and sweet potatoes can easily exceed 2,000 catties, and there are even tens of thousands of catties in later generations.

Perhaps, potatoes and sweet potatoes have such and such problems, which are not in the mainstream sense and are suitable for the people to eat, but in the face of famine or disaster, who will care whether they eat or not, just be able to fill their stomachs.

Zhao Xin developed navigation, and even actively drew nautical charts, in order to be the three major crops in South America, potatoes, sweet potatoes and corn, the first two, that is the basis of food, the latter, is the most perfect, the most suitable plant, corn may not be delicious, but corn is full of treasures, even if it is not corn itself, his plants can also be used as feed, added to livestock to eat, to a certain extent, increase the output of livestock.

The feudal dynasty realized the land annexation, but also felt the pressure brought by population growth, but there was no way, the feudal dynasty could not come to a family planning bar, after the arrival of peace, the people's living conditions improved, the natural growth rate of the population naturally increased, and when the problem was discovered, it was already difficult to return, only to wait for the turmoil of the dynasty, kill a group of people.

This is also the root of the general trend of the world, the so-called long-term must be divided, because of the advent of peace, the population began to increase on a large scale, to a certain extent, when the land and food can no longer be fed, it will inevitably cause turmoil.

The land annexation by vested interests and large landowners has exacerbated the emergence of this situation, and the land that can barely sustain itself has been taken away by the nobles and large landowners, and even some of the cash crops that are not grown with grain, but those with higher value, which has reduced the production of grain in a greater sense, and further exacerbated the emergence of this situation.

The Northern Song Dynasty Chengping is close to a hundred years, if you add the previous and later Zhou, the population has been quite a lot since its establishment, which is also the source of the gradual turmoil in these years, the slightest wind and grass, or a small disaster, will cause turmoil, land annexation, buying and selling children, and finally reach the limit, triggering a peasant uprising, overthrowing or weakening the kingdom.

So far, Zhao Xin has not been able to send people to the Americas, and there is no way to obtain high-yield crops from the Americas, but under the current premise, the use of chemical fertilizers and better agricultural planting techniques can also increase food production.

This point can be seen from the current grain growth rate in the Northern Song Dynasty, not to mention the newly added land in the northwest and Youyun, but in the Northern Song Dynasty itself, as long as the average yield per mu is increased by one stone, the grain output can increase a lot, coupled with the huge marine fishing capacity of the Dinghai Navy, the problem of grain does not exist.

From the very beginning, the Dinghai Navy ensured the population and food production at the same time, because Zhao Xin knew very well that only under the premise of enough food could the population expansion be carried out, otherwise, the carrying grain of the Northern Song Dynasty would reach the limit, no matter how powerful the Dinghai Navy was, it would not be able to change the food, what should I do when the time comes, eat fish for three meals a day, or simply starve to death.

In the future, when several islands are full of various populations, food will become the top priority.

The navy required that every maritime merchant, including the navy itself, must ensure that a considerable amount of grain is brought back when it trades in Southeast Asia or elsewhere.

It is precisely this kind of costlessness that allows the Dinghai Navy to obtain a large amount of grain after just opening shipping.

Low-value things such as grain and minerals will only appear in the transportation sequence if the size of the ship reaches a certain level and ordinary commodities cannot fill it.

Before that, the things that the maritime merchants brought in were more high-value, or relatively scarce things.

Thousands of miles away, go to China, and need to live in China for half a year, in order not to increase the income of food by one or two times, they are transporting gems, luxury goods, these things, in the Northern Song Dynasty only had a market.

Large quantities of grain were purchased from the surrounding areas, which formed the basis for the food security of the navy, and then it was farming and fishing.

Intensive, more advanced breeding technology, can make meat cheaper to obtain, plus whaling and fishing in Hokkaido baths, to a certain extent, even if the Dinghai Navy is less transported from the Northern Song Dynasty, as well as grain from other countries, it can live a good life without starvation.

Immigrated from the Northern Song Dynasty, Zhao Xin noticed the improvement of productivity, even at the beginning, but also increased the popularization of machinery, so that the demand for people on arable land was reduced, so that the immigration was started, which is also the Northern Song Dynasty lost more than 30 million people, but there was no food crisis at all, a large number of machinery and livestock, replaced the role of people, some land not only did not waste, but became better, more reclaimed.

In a short period of time, on the premise that there was no problem with food, the Navy began to encourage childbirth on the premise of ensuring safety.

Childbirth can be encouraged, but no one needs to encourage it before, as long as there is food, as long as you have the ability to give birth, how many people are not willing to give birth? Passing on the family is the greatest pleasure of the Chinese in itself, and it has even been raised to the height of the ancestors.

However, natural fertility carries disorder and uncertainty, and a certain degree of guidance and reward can promote the progress of childbirth, which can be several times or even larger, and has great significance for increasing the population of the Dinghai Navy.

For the Dinghai Navy, money is not a problem at all, take out some scarce resources, or currency, to reward more children, this is not contradictory, and the same is tilted in some aspects, for example, in the field of propaganda and industry, to publicize the benefits of childbirth for the Dingjun, reduce the existence of some female workers, and improve the welfare and wage level of the other half of the families with children.

At present, the strategy of the navy is first of all, the treatment, a child is an ordinary treatment, 2 treatment is increased by 1%, 3 3%, 5 7%, 6 or more, including 6, that is, 10%.

Don't underestimate the 10% data, according to the salary standard of the navy, the average monthly salary can now reach between 120 and 140, an increase of 10%, which means an increase of 12-14, this data is not low, almost represents a month's food for four or five people.

Not to mention, for women who give birth to children, most of the expenses for medical treatment can be reimbursed, if you add the rewards of children's learning, it is equivalent to saying more, giving birth to a child, not only will not drag down the family conditions, but will increase some.

Similarly, for the male side, there are maternity leave, vacations, etc., to ensure that there are enough people to take care of the pregnant woman during her pregnancy.

In addition to these substantive rewards, for pregnant women who can give birth, there is also a full range of introduction and publicity, bonuses and praise, so that almost every woman realizes that having more children is a glorious thing and a thing to contribute to the Dinghai Navy.

This kind of chain method eventually greatly promoted the increase of the fertility rate of the Dinghai Navy, and the natural growth rate of the Dinghai Navy was much higher than this figure under the premise that the population obtained from the Northern Song Dynasty was reduced, and the current annual population obtained from the Northern Song Dynasty was less than 400,000.

In the hands of Zhao Xin, there is a Qingli 8 years, the growth rate of the natural population of the Dinghai Navy, deducting the input of foreignness, the number of new newborns, reaching a terrible 2.8 million, deducting almost insignificant deaths, the natural growth rate of the Dinghai Navy is very terrible, after the population immigration reaches a certain height, this has become the basis for the population growth of the Dinghai Navy, countless children, since these two years have appeared, they represent the future of the Dinghai.