What is being done in Luzhou is actually a very simple medical research.

The content is mainly about female fertility, which is divided into two parts, one is the impact of reproductive age on health and longevity, and the other is the number of children...... To put it bluntly, it is a study of how harmful it is to have children too early and too much.

Of course, what Li Yuanjia can let people do in these years is investigation and research.

For this reason, he left a few people in Luzhou, and also prepared a "research fund" of 500 yuan, plus the support and help of Li Lingkui, the assassin of Luzhou and the king of Xu...... Even then, it took them several years to come up with a preliminary number.

A sample size of 1,000, a time span of five years!

Otherwise, it wouldn't have taken so long and hundreds of times to complete the task, you must know how old is the average life expectancy of ordinary people in these years? Many women who had children five years ago are no longer there......

Fortunately, after a long period of hard work, there is finally a preliminary result.

Although the people in Luzhou will continue to count, and Li Yuanjia also asked his younger brother to send several carriages of copper coins and cloth as expenses in the next few years. But as far as the information in front of me is concerned, a short period of time should be enough.

And......

[NEW] shocking!

Even if he knew that the ordinary people in ancient times had a very short lifespan, and he also knew that the maternal and infant mortality rates were very high, but the moment he saw the statistics in front of him, Li Yuanjia still trembled a little and his throat was dry.

How many people have died in the past few thousand years?

Don't dare to think!

In fact, after living in this era for so many years, Li Yuanjia can understand people's thoughts very well. In particular, the Tang Dynasty has only been established for 20 years, and the wars in the previous decades have greatly reduced the population of the Central Plains, and the imperial court has even encouraged childbirth at the cost of losing taxes......

Moreover, the inherent concepts formed over thousands of years are not so easy to change.

Not to mention anything else, think about how old did Empress Changsun marry Li Shimin? Twelve or thirteen? and Li Yuanjia's niece, Princess Li Jing of Qinghe, at what age did she marry Cheng Chuliang's kid? Ten years old!

Come to think of it, what a fuck?!

In fact, the ancients didn't know that it was not good to marry too early or have children too early? No, maybe they didn't do detailed statistics and research, but

If this is the case for the royal family, what is the situation for the people?

In fact, the royal family and nobles are still slightly better, because even if they marry early, they will use various ways to control the age of childbearing, for example, the eldest grandson married into the Li family at the age of twelve or thirteen, but when he really gave birth to his eldest son Li Chengqian, he was already eighteen years old.

But civil marriage is really not so particular.

Not to mention that even more than a thousand years later, the state has enacted a law requiring women to marry after the age of 20, and all kinds of popular science propaganda are overwhelming, and many rural girls are not married and have children before they are teenagers? On those short video platforms, these teenage mothers or teenage pregnant women even have to put their pregnancy and childbirth on the Internet, I don't know if it's just to earn eyeballs, or just feel proud?

So Li Yuanjia can really understand such a situation.

He is not one of those young people who does not occupy the red dust in the ivory tower, he has worked in the hospital for so many years in his previous life, and he has seen too many things, and it can even be said that some realities are really more bizarre than TV series!

But being able to understand does not mean being able to accept it.

So when he was in Luzhou a few years ago, Li Yuanjia planned this research...... Well, how to say it? He wants to use numbers to tell the Tang people that women should not marry too early, and they are even more anxious to have children.

How many people can be influenced, of course Li Yuanjia has no score at all, after all, more than a thousand years later, when this truth is almost "known to everyone", will there be fewer such things?

But just by virtue of his identity as the Prince of the Tang Dynasty and the data of these thousands of cases, he can always convince some people to put it?

At least......

His wife Fang Fengzhu, and his daughter in the future, Li Yuanjia can still call the shots!

So after recording the data in the letter one by one into his small book, Li Yuanjia exhaled softly, and couldn't help but show a smile on his face: "Don't talk about anything else, just with this amount of data and design, as long as China can not break the biography as it did in history, it will inevitably go down in history, right?" Hehe......"

Thinking of this, Li Yuanjia's mood instantly improved a lot.

In the history of modern medicine, when did research on this scale begin?

Anyway, in his memory, it should have been until the twentieth century.

You know, even in the future, it will not be easy to conduct a study involving hundreds of people...... It's just a simple piece of information, but there's no doubt that the sample size is there, and it's very difficult to ensure the accuracy of the information.

But in the Tang Dynasty in the seventh century, Li Yuanjia did it.

With his identity as the Prince of the Tang Dynasty, his younger brother Li Lingkui's identity as a assassin, and a few years and hundreds of dollars, Li Yuanjia completed this unprecedented research!

And in Li Yuanjia's view, the credibility of these data is extremely high.

After all, just counting the life span of women, asking them how many children they had, and giving them a pound of corn after answering the questions, those people have no reason to lie......

If this can't be written into the history of medicine, what can it be?

"Next, we need more data!"

After taking a deep breath, Li Yuanjia's eyes flickered frequently: "It's only a thousand, this is far from enough, more data must be accumulated...... Five years! At least another five years! And ......"

Thinking about it, Li Yuanjia took a deep breath: "It's just Luzhou, the persuasiveness is still weaker after all, if there are other places that can be counted together!" ”

It's just that as soon as this thought rose from his heart, Li Yuanjia smiled bitterly and subconsciously shook his head.

It's hard!

The foundation on the Luzhou side was laid by Li Yuanjia, and when he left later, he didn't know what shit luck he had, and it was his brother Li Lingkui who took over. As long as he greets his younger brother, and doesn't even need Li Yuanjia to keep people and money, the current King Yu can handle things properly.

But in other places, there are not such good conditions.

Let's not talk about whether people cooperate or not, just let people count how many mothers die in a year, how old are they to get married, what age do they have children, etc., how many people are willing to take care of you? Not to mention a pound of corn, some people may not be willing to give him a hundred pounds. After all, Li Yuanjia could not only count the poor at the bottom of society, but also had to take into account the small landlords and the rich people in the city.

So after thinking about it for a while, Li Yuanjia sighed and said, "So, there is a long way to go......