In the past four years, under the leadership of Zhao Xin, the Dinghai Navy, perhaps other things, can be put aside, or even slowed down, but the population has never relaxed.

Population is the foundation of everything, and it is unceremonious to say that without population, there would be no strong industrial base, and this can be seen from the fact that the level of productivity of the Navy is getting stronger and stronger.

Only in an industrial society will the importance of people be highlighted, and only in an industrial society will there be a shortage of labor, an agricultural society, how many people grow and how much land, especially when history is a mirror, the population grows to a certain extent, and under the premise that there is no way to accommodate so much, some ruling officials even think that it is not good to have more people, and it is better to die!

However, in an industrialized society, as long as it can afford it, then the demand for population is almost endless, and every additional population, under the premise of developed productive forces, the value created is considerable, not like the Northern Song Dynasty, which can only farm, some relatively barren land, and even he himself cannot feed.

But industry is different, even in the Daimyofu, the more resistant handicraft workshop, after the industrialization of the restructuring, can burst out stronger productivity, so that a blacksmith's production efficiency skyrocketed dozens of times, or even hundreds of times, so the benefits can be great.

This is the charm of industry, industry can make money, the larger the industry, the more so, agriculture is stable, a certain degree of scale agriculture can have some income, but this income has a ceiling, once the ceiling, and then want to increase, it is very difficult, on the contrary, industry, as long as the productivity and research continue to deepen, the speed of development, will be faster and faster.

Productivity is a problem that the Dinghai Navy has always faced, and with unremitting efforts, the natural growth rate of the 35 million population of the Dinghai Navy is about 8.5%. In other words, out of 100 people, an average of 8.5 people are born every year.

Don't think that this number is very low, if this number is in longitudinal comparison, it is quite high, because among the 100 people, there are children who will not have children, as well as women over 50 years old and some old people, in Dinghai, because it is a newly built city, and it is still an industrialized city, it has only been established for 4 years, and most of them have come to work, that is, later, after gradually making money, they buy fixed property, and then their families appear, and these workers gradually take over their families. That's when the elderly and children appeared, and even then, the proportion of this part was quite low.

Among the population increased by the Dinghai Navy through the Northern Song Dynasty, more than 7 percent of them are in the prime of life, and most of these prime of life are married, and under the premise that there is no family planning, under the premise that a labor force can support a family, the fertility rate will increase wildly, which is a natural law.

In addition to the initial time, Dinghai has a large number of female workers, in addition to some key positions and technical positions, other female worker positions are greatly reduced, which is the purpose of Dinghai Navy, in order to gradually increase the fertility rate.

If women are working, the fertility rate will naturally decrease, even if it is a relatively easy job, and in the same way, if the mother is working, even if it is placed in the level of medical security in the 21st century, the mortality rate of newborns will rise, or it will increase significantly, and in the same way, this group of children will not be easy to become talents.

Zhao Xin and Dingjun, the vision is on the future, what is the future, children are the future of the Dingjun, in order to ensure that the Dinghai Navy has continuous high-quality personnel, this part must be paid attention to, even if it is not clear to say it, through publicity, guidance, and other overt and covert measures, let women leave work and return to the family.

Similarly, in addition to allowing women to return to the family, from the potential, to increase the fertility rate, but also from the bright side, positive publicity of the benefits of having children, and in the entire scope of the Dinghai, to give subsidies, this subsidy is not virtual, is actual, the same, the intensity of this subsidy is also quite large.

For children, after the second decade of the 21st century, China gradually let go of the second and third children because of the population crisis, but it backfired, and the population did not increase and expand rapidly, a fundamental reason is that it is too expensive to raise a child.

This point does not exist in the Dinghai Navy, not to say that the Navy has raised the subsidy for having children, just say no, the high welfare benefits of the Dinghai Navy, the relatively low price of food, even a worker who has just started work, can feed a family, coupled with crazy propaganda, the natural growth rate brought about by this is relatively high.

Childbirth has hardly stopped, and it is quite normal for a general mother to have one child every two years, which is the basis for the natural productivity to exceed 8.5%.

The growth of the population is determined by two aspects, the people have the desire to have children, and are willing to give birth, but if the medical treatment cannot keep up, the mortality rate is still as high as it used to be, and the fertility rate cannot be high.

In the traditional era, the feudal era, the mortality rate of newborns was very high, because newborns were relatively fragile and susceptible to other influences.

Some accidental collisions, diseases caused by careless care, and some congenital factors have always been the root cause of the high infant mortality rate.

These rules can be adjusted, for example, to strengthen the number of Chinese medicine and medical personnel, in the same way, in Chinese medicine, the introduction of some Western medicine concepts, the combination of the two, Chinese medicine slowly and Western medicine to treat the symptoms, the two together, in a large increase in the cure rate.

None of these are the key to fundamentally changing the survival rate of newborns, a fundamental key is caesarean section, which is the key.

The worst is childbirth, according to the data of later generations, at the time of childbirth, there is a considerable degree of dystocia, this rate is quite high, especially for pregnant women who have given birth several times, the proportion is even higher.

In the absence of modern medicine, for pregnant women, every birth is a ghost gate.

Generally, the natural mortality rate will reach 2-3%, which does not seem to be high, but many pregnant women have to give birth to several children, which is a terrible increase, and many women, not from disease or other things, a large part of them are at the time of childbirth, because of childbirth dystocia and death.

For childbirth, one corpse and two lives are the most terrible, not only one died, but also a mother, which is equivalent to saying that there is no future birth, this is not one or two, the blow to the fertility rate is very big.

In Dingjun, the modern medical system has not yet been established, but with the help of Zhao Xin's card system, including some theories of anatomy, hematology, etc., the problem of caesarean section has finally been solved with the cooperation of traditional Chinese medicine and some others.

In fact, caesarean section in later generations is already a very simple small operation, with blood transfusion as the basis, simple sutures, and some anatomical things, as long as there is a direction to go, it is okay, or even completely ignorant, and it can be practiced simply practiced.

Similar things, Zhao Xin doesn't know how many he has done, Shengsheng has made the entire Ding Haijun's medical system, a leap, from simple, even Chinese medicine has not reached the peak, Shengsheng has joined various schools of Western medicine, which may make some famous doctors confused, but in fact, it has increased the level, and the cure rate has greatly increased.

For dystocia, the vast majority of dystocia can be solved by caesarean section, except for a very small number of pathological, or congenital dystocia, some fetal malposition, or the pelvic bone is too small and other dystocia, can be solved by caesarean section, with this, coupled with the increase in medical conditions, so that the mortality rate is greatly reduced.

It is impossible to completely eradicate the mortality rate of pregnant women, and it is already very terrible to reduce the average birth mortality rate from 2 to 3% to about 120 per 100,000 people, which is more than 10 times, which has played a direct role in the increase in population.

Newborns, after popularizing some of the practices of surgery and anesthesia, can be removed by caesarean section under the premise of dystocia, so that the natural survival rate of the baby is greatly enhanced, which also promotes the increase of fertility from the side.

The natural growth rate of the population, the remaining direction, is open source, and the other direction is interception.

In feudal society, even if it is not an era of war, the average life expectancy is not very high, life is rare for seventy years, this sentence is so, for ordinary poor peasants, there are many hardships in life, many times, it will endanger health, and take life.

The productivity of the Navy is quite high, and if you do not pay attention to it, it is easy for workers to perform high-intensity work, and various problems will arise, which will reduce the average life expectancy.

In the early days of the establishment of the Dinghai Navy, he recruited a large number of famous doctors from all over the world, and then let a large number of smart and talented people have been learning from them, and injected some basic theories about Western medicine.

The combination of the two has a good effect, at least, in general diseases, it has a considerable effect, and the result is that the average life expectancy of the average person is greatly increased.

The natural mortality rate, itself, the number of elderly people in the Dinghai Navy is small, more than the elderly over 60 years old, accounting for less than 10% of the entire Dinghai Navy, coupled with advanced and convenient medical treatment, the mortality rate has been controlled at about 3/10,000, far lower than the mortality rate of 1.5/1,000 in the Northern Song Dynasty.

In the face of the natural growth rate, the mortality rate is insignificant, even at 8% of the natural increase, 2.8 million newborns will be born every year, which is a very large number

It is estimated that according to this calculation, in a maximum of 10 years, the population of the entire Dinghai Navy will double, reaching more than 50 million, and relying solely on these natural growth rates, the population of the Dinghai Navy can have a large-scale growth.

Although it is said that from the Northern Song Dynasty, obtaining the population is the most convenient and fast, in the same way, the population obtained from the Northern Song Dynasty can also directly obtain the prime of life and directly enter the labor and production, which is a boost to the labor force population of the entire Dinghai Navy, and has an immediate effect.

The conflict with the Northern Song Dynasty will intensify, in addition, the Northern Song Dynasty has a total of more than 100 million people, after being frantically plundered by the Dinghai Navy 35 million, of which seventy or eighty percent are still in the prime of life, which is equivalent to losing one-third, this is already in the warning line, once it exceeds this warning line, it is definitely not a good thing for the Dinghai Navy.

On the contrary, there is such an increase in fertility, there is no sequelae at all, although it will take 20 years to be able to let them grow up, but these were born in the Dinghai Navy, everything is in accordance with the training methods of the Dinghai Navy, and after learning, the young people who finally came out, they have completely different psychology and values from their elders and fathers, they were born here, Zhang is here, and they enjoy the various benefits of the Dinghai Navy, and it is natural that there is a centripetal force, which is what a force and a country should have.

In this sense, this is a good thing, but it takes too long to see the effect in a short period of time.

Even if it is the fifth year of Qingli, when the Dinghai Navy was just established, he came to the Dinghai Navy and gave birth to a baby, according to the age of 16, it will take almost 13 years from the eighth year of Qingli.

In fact, when the Dinghai Navy was just established, these people who were in the Dinghai Navy at that time basically did not have many children.

After all, in addition to some refugees who were sent over by Lianghuai, the rest are some people who came out to work because of family poverty, and their mentality is still maintained under the premise of working hard and changing their lives, and there are not many who want to have children.

The real large-scale increase was in the sixth year of Qingli, with the gradual on-track of the Dinghai Navy, a large number of businesses, as well as the emergence of factories, all aspects were stabilized, as long as they worked in the Dinghai Navy for more than a year, improved their lives, owned real estate, and even lived the life of small landlords and even petty officials before, this point abounds.

Full of warm thoughts**, this sentence sounds harsh, but the truth is very straightforward, when even survival cannot be guaranteed, who wants to regenerate a burden, but if there is a better life, when they are idle, someone chooses to get married, or take over the wife and children from their hometown.

Under the premise that the husband and wife are reunited and live a good life, what will they do when they are resting, is it not to kill time, so giving birth to a child on the kang has become a more choice.

Therefore, the fertility rate has only risen on a large scale since the sixth year of Qingli, and from this point in time, the fertility rate of the Dinghai Navy has maintained a relatively high level, constantly climbing upward, until now, reaching a terrible level of 8.5%.