"Open the mountain and gravel as if you are waiting?"

"Invincible in sweeping a thousand armies?"

After reading Li Yunze's letter, Rao is Yingzheng, who has always been full of confidence in Li Yunze, is also full of doubts, "What is so powerful?" ”

Naturally, the messenger did not know, so he had to see for himself.

Thinking about the plague of locusts in his heart, after a little hesitation, Ying Zheng still chose to take a look.

When he came to the general prison located in the middle of the mountain, he saw that Li Yunze had not said a few words, and he was led all the way to a ravine more than ten miles away.

The accompanying palace guards looked nervous, and searched all the places where they could hide people when they went up the mountain and into the ravine.

It can't be helped, it's too dangerous in this environment.

"I'll show you something good."

Li Yunze, who was slightly mysterious, took Ying Zheng to a covered car.

When the leather was lifted, there were large pieces of stuff wrapped in oiled paper that resembled large bricks.

picked up a piece and looked at it for a while, and threw it in his hand, Ying Zheng was puzzled and asked, "What is this?" ”

"Gunpowder, black powder."

Li Yunze motioned to the disciples of the Mo family who followed, took the gunpowder bricks to the foot of the mountain hundreds of steps away, installed a fuse to link them, and stuffed them into a pit dug in advance.

Pulling Ying Zheng to the back of a wall in the distance, waiting for the fire to light over there through the wall.

"Taifu."

Ying Zheng was a little anxious, "Recently, there has been an endless famine in the country, and a large number of locusts have caused a locust plague, and the widow is busy."

"It's fast, it's good in a while."

Li Yunze waved his hand and motioned for Ying Zheng to look towards the cave in the distance.

In desperation, Ying Zheng had no choice but to pack up his mind and look over there seriously.

After a lot of effort, I saw the children of the Mo family who had transported bricks before, hurrying back, and the speed of the run was so fast that it seemed that some demons and monsters were chasing after them.

As soon as Ying Zheng wanted to ask what this mysterious god was doing, he saw a sudden light up hundreds of steps away.

The light was so dazzling that he subconsciously closed his eyes.

This was followed by a roaring thunderclap!

This movement really scared Yingzheng to tremble.

I've never seen or even thought about such a scene, and it's only natural to be scared.

Fortunately, Li Yunze supported him, and beckoned the dumbfounded palace guards around him, holding a shield to cover the top of Yingzheng's head.

It didn't take much effort, and all kinds of debris, including gravel, vitrified soil, grass and tree residues, etc., fell like raindrops, and the sound of smashing on the shield continued.

Ying Zheng, who came back to his senses, looked into the distance through the wall.

There was still a fire burning over there, and there was a thick cloud of smoke rising into the sky.

"This, this, this" Yingzheng, who was deeply shocked by the power of technology, trembled and asked, "What is this?" ”

"Got it, Black Powder."

patting the floating soil on his body, Li Yunze pulled Ying Zheng over there, explaining as he walked.

When the dizzy Ying Zheng came to the scene, he saw that the previous cave had completely turned into a huge pit, all around which were radiating traces, and the fire was still burning, and the mood in his heart also changed from panic to ecstasy.

"Taifu, can this thing attack the city?"

"It was made to siege the city."

During the Warring States period, the disputes between countries were different from the foreign wars during the great unification.

During the Han and Tang dynasties, foreign wars were basically based on field warfare, and the test was the technical and tactical commanders of troops, equipment, and tactics.

During the Warring States Period, field battles were naturally important, such as the Battle of Changping, which can be said to determine the fortunes of the country.

But what can really completely conquer a country is siege warfare.

In this era, the level of city casting was already very high, and the city defense was strong and difficult to overcome.

There are often long-term sieges that cannot be defeated.

Eventually, they had to retreat because reinforcements arrived, or because food supplies were running out.

Therefore, siege warfare is an extremely important thing in this era.

In order to be able to break the city, I really thought about any way, and all kinds of siege equipment were gradually invented.

It's just that compared to black powder, its power is completely incomparable.

"With this artifact, Great Qin is not far from dominating the world~~~"

Yingzheng, who had begun to have a beard at the corner of his mouth, looked up to the sky and laughed.

finally stabilized his mind, and saluted respectfully to Li Yunze, "Taifu has made great contributions to Daqin, and the widow is willing to worship Taifu as prime minister!" ”

Here in Daqin, the highest position that outsiders can stand on is the prime minister.

Whether it is Zhang Yi or Fan Ju, or Shang Ying, Lu Buwei, etc., the highest condition for Daqin to encircle outsiders is this.

"The prime minister who has been abolished is no longer necessary to re-set it up."

Li Yunze was naturally uninterested in these, and waved his hand to signal, "The king is busy with state affairs now, but he has even abandoned his studies, how long has it been since he came to Xunso?" ”

Ying Zheng's face was pale, and he saluted again and again, "The lesson of Taifu is that as long as the widow has time, he will definitely come to Taifu's side to learn." ”

After inquiring about the secrecy process, he ordered a battalion of soldiers and horses to be sent over to guard the secret, determined that the secret of this black powder must not be allowed to spread to the Kanto region.

After finishing all this, Ying Zheng said to Li Yunze, "Taifu, in the past two years, natural disasters have continued, and the people have been displaced and have no food and clothing."

"Then go grab it."

Ying Zheng smiled bitterly, "There is a shortage of food in the army, and it is difficult for the army to be dispatched." Moreover, there is no surplus food in the Kanto countries, and even if you grab some, you have to consume it on the way. ”

"You."

Li Yunze nodded Yingzheng: "It's a loss, the globe is still with you, the east is not bright, and the west is bright." If you can't grab food in the east, then go to the west to grab cattle and sheep. ”

Ying Zheng said this thoughtfully, "I don't know what the combat power of the Yue clan is." ”

"It's useless to say that."

Li Yunze raised his chin, "How is the combat power, you have to know after the fight." ”

"So be it." Li Yunze instructed: "You first arrange for people to go to the grassland to grab cattle and sheep, and I will also find some ways to increase grain production here." ”

Hearing this, Ying Zheng was overjoyed and said to the end, "Thank you, Taifu!" ”

After returning to Xianyang City, Ying Zheng began to arrange the dispatch of troops.

Everyone thought that they were going to take advantage of Wei Wuji's illness to die to fight the Wei State, and by the way, they beat up South Korea, and they all wanted to be the first to be the commander of the army.

But the result was that he was going to the west to fight the Yueshi.

It's a place you've never heard of.

Fortunately, there was a precedent for opening up the Hexi Corridor before, but there was no opposition.

After arranging these things, Ying Zheng fulfilled his promise and rode his horse to find Li Yunze for class.

Li Yunze didn't teach him the art of the emperor, nor did he say that he should cultivate himself and become a good person with all-round development of morality, intelligence, physical fitness, aesthetics, and labor.

He just kept teaching Yingzheng science.

From mathematics, to physics, to chemistry.

They all start from the basics and start with simplicity.

Learning mathematics, physics and chemistry is very boring, at least Ying Zheng thinks it is very boring.

But when Li Yunze said that the black powder was made by relying on the knowledge of mathematics, physics and chemistry, Ying Zheng abandoned the irritability in his heart and studied it seriously wholeheartedly.

And in order to ensure that knowledge is not leaked, the eunuchs are not even allowed to stay with them during the study class.

"Taifu, what is this?"

On this day, when Li Yunze was fiddling with and assembling a Quyuan plow, Ying Zheng came over and asked curiously.

"The zigzag plough is used to plough the land."

Assembling the Quyuan plow with his own hands, he raised his hand and touched the sweat that did not exist on his forehead, Li Yunze responded, "The utility of ploughing is at least several times higher than the straight plough used now." ”

Straight ploughs were rare in those days, and farmers were usually shirtless in the sun, wielding wooden hoes to hoe the ground.

The reason why the Quyuan plow was made was mainly because the Qin State got a large number of cattle.

Ying Zheng circled around the Quyuan plow, and immediately greeted out, "Zhao Gao!" ”

A eunuch hurriedly ran in and saluted, "Great King." ”

"Call someone in and carry this out to find a piece of farmland." Ying Zheng stretched out his hand and pointed at Qu Yuanli and said, "Lead another cow over." ”

"Hi~~~" Zhao Gao didn't dare to slack off, and hurriedly set off to do something.

Li Yunze looked at Zhao Gao's back as he left in a hurry, but he didn't say much.

He took Yingzheng and walked out, "This thing is the icing on the cake, and it really has a huge effect on increasing grain production, and it has to be sufficient water conservancy and fertilizer." ”

As for the good seeds, which are one of the three major elements, he didn't say that the people of these years also know how to make good seeds with good grains.

"In terms of water conservancy, have you been to see the construction of the canal presided over by Zheng Guo?"

"So that the master knows."

Ying Zheng replied with a smile, "I've already been there, and I've measured it with Professor Taifu's knowledge." ”

Li Yunze nodded, but instead of following Yingzheng's words to ask about the measurement results, he shifted the topic to fertilizer.

"Fertilizers are mainly used in chemical knowledge." Li Yunze imparted knowledge: "You already know the rotation and fertilizer, the key to the so-called potassium fertilizer is the content of potassium oxide. This thing is difficult to make, but there are natural potash mines in the Western Regions, and potash can be extracted by soil methods. ”

Speaking of this, Li Yunze took out a book from his sleeve and handed it over, "This is the flotation method for refining potash ore, you are learning it, and you will take it in the next exam." ”

"Hey."

Ying Zheng solemnly put the book into his arms.

"After taking the Western Regions, those salt mines will be Daqin's."

"Don't worry, Taifu."

Ying Zheng, whose eyes were full of confidence, immediately responded, "The Western Regions will be the Western Regions of Great Qin!" ”

"It's good to have that ambition."

Li Yunze sighed, and then turned the topic back to fertilizer.

"Phosphate fertilizer, chemical production is more difficult, mainly because the current scientific and technological level of Daqin is too poor."

"If it is natural, it has to be the bones of fish, shrimp, birds and beasts, ground into powder. It's just that the Qin State doesn't have so much bone meal, so if you want it, you have to go to the sea. ”

"Out to sea?"

"That's right, out to sea. There are many islands in the sea full of seabirds, and the guano they accumulate year after year is the best phosphate fertilizer, and there are enough of them. ”

"Birds, guano?" Ying Zheng paused differently, he really didn't think that guano would be of such use.

"The world is so big, nothing is waste."

With a smile and a smile, Yingzheng walked out, and Li Yunze sincerely told him, "This is the power of chemistry." Listen to the master's advice, learn mathematics, physics and chemistry well, and you are not afraid to go all over the world! ”

(End of chapter)