I watched Er Chuang’s short video, and everything went numb!

[So. ]

[Dorgon led the Eight Banners Army to Shanhaiguan after a day and night of rapid march. ]

[The Battle of Shanhaiguan broke out, and the Dashun Army, which had long been lost in wealth, was defeated by Wu Sangui and the Eight Banners Army. ]

[The Qing army entered the Central Plains. ]

……

"This is the last peach to be picked."

Many ancient people from all dynasties saw this and couldn't help but have such a thought in their hearts.

The Ming Dynasty fought Li Zicheng to death, and in the end, the Qing Dynasty benefited.

……

[Unlike the later atrocities, the early Qing army, assisted by Han scholars, raised the banner of "revenge for the Ming Dynasty Chongzhen". ]

[Don't underestimate this banner. ]

[This banner is equivalent to telling the landlord class that our interests are the same. 】

……

"Damn traitor."

Many ancient people in the past dynasties cursed in their hearts.

They didn't believe that the Manchu Tartars could come up with such a strategy.

Obviously, this must have been the idea of ​​the Han advisers who surrendered to the Qing Dynasty.

……

[So. ]

[Out of fear of the peasant army's "torture" and the idea of ​​maintaining their own vested interests, the gentry and landlord class in the north turned to the Qing Dynasty. ]

[Because in the Chongzhen Dynasty, the northerners were long excluded by southern officials, and after the uprising army expanded rapidly, they did not unite these forces in time. ]

[In the end, these forces were inevitably picked up by the Qing court. ]

[According to statistics, 68% of the ministers who surrendered to the Qing Dynasty in 1644 came from the north. 】

【In the imperial examinations that were restored in 1646, 365 Jinshi were from the north, accounting for 98%. 】

【To put it bluntly, the Jurchens had at most hundreds of thousands of people, and it was impossible for such a small number of people to rule the vast area north of the Yangtze River. 】

【So in order to rule, it colluded with the northern Han landlords without any limit. 】

【And it was precisely because of the widespread support of the northern Han landlords that the Qing court was able to enter the Central Plains and create a new dynasty. 】

…"Two eight three"…

The Hongwu plane of the Ming Dynasty.

After watching the last part of the video, Zhu Yuanzhang was not surprised at all.

When the Yuan Dynasty entered the Central Plains, it also received the support of the northern Han landlords.

Since the Southern Song Dynasty lost the north, the north has been controlled by foreigners for more than a hundred years.

The southern and northern Han people have almost been separated from each other.

After the establishment of the Ming Dynasty, he has been coordinating the relationship between the northern and southern Han people, trying to re-integrate the northern and southern Han people.

Unexpectedly, the contradiction between the southern and northern Han people in the Ming Dynasty in the future has intensified again.

"A bunch of idiots."

Zhu Yuanzhang cursed those weird Ming emperors in the future again in his heart.

……

In the sky giant screen.

The video is refreshed.

A new video appears.

[UreaWar! How does a small amount of urea affect the whole world? 】

……

Looking at this line of big words, many ancient people in the past dynasties were full of doubts.

"What is urea?"

The information revealed by the title of this short video seems to be a very extraordinary thing.

These ancient people couldn't help but become more curious and wanted to learn more about it.

……

[Recently, many Korean media reported that because Longguo stopped exporting urea, Korea was facing the risk of running out of stock, and the inventory could only support another three months. 】

[Then, Koreans began to scramble, and the transaction volume and sales volume of urea soared 17 times and 13 times respectively. 】

[Some websites were robbed to the point that the server was paralyzed, and major stores also limited purchases. 】

[Then why did they rob this thing? 】

……

The same question also emerged in the minds of many ancient people in the past dynasties.

Seeing the situation described on the giant screen, they became more curious about urea.

"What on earth is this?"

"What's the use of it?"

With doubts, these ancients continued to look at the giant screen in the sky.

...

[About 40% of the motor vehicles in South Korea burn diesel, and the exhaust of diesel engines contains a lot of pollutants, which need to be converted by injecting urea. ]

[This is the only way to meet environmental protection standards, and if it is not added, the machine will malfunction and the car will break down. 】

The bullet screen flew out:

"Not only motor vehicles, but also many missile launchers are diesel vehicles. They cannot do without urea. For example, the missile launcher in Baodao was once paralyzed due to insufficient urea for vehicles."

"Reply-so serious? The impact of not adding urea is so great?"

"Reply-lack of urea will limit the torque of the vehicle, resulting in insufficient power, and even automatic deceleration, and will also damage engine parts."

"..."

Looking at the content on the high-altitude giant screen.

Although the ancient people of all dynasties did not know what urea was, they had a certain understanding of the importance of urea.

However, what they did not know at the moment was that this was not the most important use of urea.

……

【Urea produced in Longguo accounts for two-thirds of the total import volume of Bangzi Country. If we only look at the raw materials for automotive urea, more than 90% are imported from Longguo. 】

[In 2021, they have already experienced a urea crisis. 】

[At that time, exports were suddenly restricted, and the price of urea soared 10 times in an instant, and there was a shortage everywhere. 】

[The Korean people had to queue up to buy urea, and a large number of freight trucks were stopped at that time. 】

[Now it happens again, and the Koreans are naturally nervous. 】

…

“So that’s it.”

Many ancient people in the past dynasties can now understand the Korean people’s crazy rush for urea.

Having suffered losses and learned lessons before, of course the reaction will be more sensitive.

Emperor Wu of the Han Dynasty.

Liu Che's mind moved slightly.

"Dragon Country often cuts off the supply of urea to the Korean Country. Is it attacking the Korean Country?"

As a power struggle enthusiast and power struggle expert, he instinctively thought of this matter in the direction of national struggle.

And he felt that this possibility was very high.

After all, the Korean Country is almost a lackey of the Eagle Country and will follow the orders of the Eagle Country.

And Dragon Country and the Eagle Country are undoubtedly enemies.

Therefore, once the Korean Country does something to provoke the Dragon Country under the instructions of the Eagle Country.

Dragon Country is very likely to use the means of cutting off the supply of urea to hit the Korean Country.

From the many videos he has watched before, he has summed up experience.

In the future, countries with conflicts like to take similar economic sanctions without tearing their faces or launching military wars.

So he naturally had such a guess at this moment.

……

[When Korean media analyzed this matter, they mostly leaned on the relationship between the two countries, saying that urea is a means of sanctions, and once Korea has unfriendly actions, it will cut off the supply. ]

[When you see the news, you may also think in this direction,]

[But is it really that simple? ]

[Let's talk about the conclusion first. Urea is not only used to purify exhaust gas, that is just a sideline, and nourishing crops is its main business. ]

[90% of the world's urea is actually used as agricultural fertilizer. ]

[The purpose of restricting urea exports, or the main purpose, is to ensure the safety of agricultural fertilizers and hold our rice bowls firmly. 】

The bullet screen flew out:

"Indeed, fertilizers are too important for agricultural production. During the 2,000 years from the Qin and Han Dynasties to the Qing Dynasty, my country's wheat production only increased from 50 kg/mu to about 100 kg/mu. Now, wheat can reach 650 kg/mu in high-yield areas, which is inseparable from the use of fertilizers."

"Reply-An expert has analyzed that among the reasons for the increase in grain production, fertilizers account for about %."

"Reply-Indeed, in the 100 years from 1908 to 2008, the number of people that can be fed per hectare of arable land in the world increased from 1.9 to 4.3, which is inseparable from the contribution of fertilizers."

"..."

The plane of Emperor Taizong of the Tang Dynasty.

Li Shimin looked at the giant screen in the sky and was shocked:

"This urea can actually increase grain production so much?!!"

He instantly focused his attention and looked at the giant screen in the sky more and more attentively.

Food is the most important thing for the people, and a country cannot be stable without food.

Whether it is the Tang Dynasty, which is still an agricultural society or may enter an industrial society in the future, the food problem will definitely be regarded as an important national issue.

After all, if people can't even eat enough, let alone do other things.

Therefore.

When Li Shimin heard that urea was closely related to food production, he would naturally pay attention to it immediately.

Actually.

It's not just Li Shimin who has this attitude.

In many other dynasties, there are many emperors who, like Li Shimin, attach great importance to the content of the following video.

In a sense, urea, which can increase grain production, is a priceless treasure in the hearts of these emperors.

No, or it can be said to be a priceless treasure!

After all, a stable grain supply means a stable country.

…

[Recall, do you often see woven bags with "urea" written on them? ]

[This is because a large amount of urea is used for fertilizer in rural areas, and a lot of empty bags are recycled. ] (To read the novel, go to Feilu Novel Network!)

[Compared to other difficult chemical terms, the name urea is very simple and direct. 】

【We humans, as well as most mammals, produce urea every moment due to metabolism, which is excreted from the body with urine. 】

【In ancient times, people used excrement for fertilizer because it contained urea, and plants could absorb a lot of nitrogen from it for growth and development. 】

……

“So that’s it.”

Many ancient people in all dynasties suddenly realized it.

Since the Western Han Dynasty, the ancient Chinese have known how to use excrement to fertilize farmland.

However, the ancients knew the fact but not the reason.

And now, they finally know the principle.

In many dynasties before the Western Han Dynasty, many ancient people learned a new knowledge.

That is, excrement can be used to fertilize farmland.

At this time, they still used more rotten leaves, silt, pond mud, rotten weeds, etc. as raw materials for farmland fertilizer.

This knowledge is undoubtedly an improvement in the field of farmland fertilization for them.

……

During the Wanli period of the Ming Dynasty.

While listening to the narration on the giant screen in the sky, Xu Guangqi wrote furiously.

He wanted to record all these contents in a book he was writing at the moment.

And the name of this book, he had already thought of it, it was called: "Complete Book of Agricultural Administration".

Not only Xu Guangqi.

There are also many people such as Jia Sixie of the Northern Wei Dynasty who wrote "Qimin Yaoshu", Wang Zhen of the Yuan Dynasty who wrote "Nongshu", etc., who also made the same move.

They all chose to record the knowledge they had learned in their respective works....

……

[After entering the modern era, scientists figured out the principle of the role of excrement, and began to artificially synthesize high-purity urea as a chemical fertilizer. ]

[The nitrogen content in urea fertilizer can reach 46%, while the nitrogen content of traditional farmyard manure made from excrement is only . ]

[The concentration of nutrients is much higher, and the efficiency of fertilization is instantly improved. ]

……

"Is the gap so big?"

In the Hongwu plane of the Ming Dynasty, Zhu Yuanzhang and Zhu Biao were shocked.=|

The difference in nitrogen content between urea and farmyard manure is a world of difference.

And this means that the effects of the two are also very different.

"How is this urea produced?"

"It would be great if the Ming Dynasty could also produce urea."

Zhu Yuanzhang stared at the giant screen in the sky and thought in his heart.

...

[Due to the limited total area of ​​arable land, it is very dependent on chemical fertilizers to achieve agricultural production growth. ]

[Urea is the main force, and about 160 million tons of urea are spread on fields around the world every year. ]

[With such a large demand for urea, who will produce it? ]

[my country is currently the world's largest urea producer and exporter, accounting for about 30% of the world's total production, and its export volume once accounted for 30% of the total global urea trade. 】

[Urea is not expensive per unit, and the amount used is large. Moving it around half the world will seriously affect the price, so generally the supplier is found nearby. 】

[Most Asian countries will look for Longguo. 】[]

[In 2021, about 40% of Japan's urea was imported from Longguo. 】

[India bought 2.77 million tons, Jiaozhi, Pakistan, and Myanmar are also big buyers of Longguo urea, and the country we mentioned at the beginning is of course one of the big customers. 】

……

"Longguo is awesome!"

Looking at the giant screen in the sky, many ancient people in the past dynasties sighed in their hearts.

In their view, Longguo is the largest producer of such important materials, so it is naturally extremely powerful.

……

[However, my country's urea exports are actually not stable. 】

[First, urea is not synthesized out of thin air, it needs raw materials. 】

[Secondly, we not only produce urea, but domestic agricultural production also consumes a lot of urea. 】

[We won’t talk about the complicated production process in detail. 】

[You only need to know that there are two technical routes for urea production, either using natural gas for synthesis or using coal as raw materials. 】

…

“Why don’t you talk about this…?”

“It would be great if you could talk about it in detail!”

Many emperors of all dynasties were very disappointed.

This is exactly what they care about most, but they didn’t expect that people in later generations would not talk about it?

“Ah.”

In the Hongwu plane of the Ming Dynasty, Zhu Yuanzhang sighed in his heart.

Although according to his guess, even if people in later generations introduced the production process of urea, with the current technical capabilities of the Ming Dynasty, it is highly likely that they will not be able to manufacture it.

But what if?

Besides, it’s not possible now, maybe it will be possible after the Ming Dynasty starts the industrial revolution.

Zhu Yuanzhang thought with regret.

……

[In fact, no matter which route is taken, the cost of urea will be tied to the international energy price, and the output of urea will be linked to the energy supply. ]

[This means that the price of urea will haveFluctuation. 】

[And my country itself is a 0.5 agricultural country, with a vast amount of land that needs to be fertilized and more than 1.4 billion people to eat. 】

[Therefore, my country will prioritize meeting domestic urea demand by restricting exports. 】

[Like in 2021, it was because of changes in the international situation that led to insufficient coal supply. 】

[And because my country lacks oil and gas resources, it mainly relies on coal to synthesize urea, so many urea production companies have reduced production. 】

[At this time, if we sell it abroad, it will not be enough for domestic use, so we began to restrict exports. 】

…

"So that's it."

In the dimension of Emperor Wu of the Han Dynasty, Liu Che now understood the reason why Longguo stopped supplying urea to Bangziguo.

"But, is there really no intention to use this to hit Bangziguo?"

Liu Che still had doubts in his heart.

……

[This time, the price of natural gas has skyrocketed, and the supply is insufficient, which has affected the urea produced by natural gas in countries such as the Bear Country. ]

[As a result, the price of urea in the international market has been rising, and domestic companies have taken more urea for export in order to make more money. ]

[This has led to a rise in domestic urea prices, with a 40% increase from June to November. ]

[If this continues, it will affect the spring ploughing next year, so exports must be cooled down. ]

[Which is more important, making more money from exports or the food security of 1.4 billion people? ]

[This account is easy to figure out. ]

……

Many ancient people in all dynasties nodded.

Then of course, it is necessary to prioritize the food security of their own country.

It is okay to make less money, but once the country's food security is in trouble, it will be a big trouble.

……

[But as long as we choose food security, those countries that need to import urea will definitely be affected, and there is no way to avoid it. ]

[However, there is another problem. ]

[Since urea products from Longguo are easily out of supply, why don’t countries like South Korea and Japan build their own factories? ]。