The sun was rising in the east, the sun was shining in the sky, and the dog was on duty in front of the gate of the city wall, and when he saw Zheng Ning and the two patrolmen leading the carriage from the post road, they hurriedly greeted him.

"Sixth sister, I'll help you pull it in!"

The dog hurried over and helped lead the carriage.

Zheng Ning is the sixth of the six gentlemen in Yuyao, and the dogs and young inspectors all call her "Sixth Sister". In fact, he is a year older than Zheng Ning.

"Fifth brother is giving a lecture, why didn't you go to the lecture?"

Zheng Ning glanced back at the dog and frowned.

The two walked along the boulevard next to the school field, the sun was shining on the school field, and the shadows of the trees on the boulevard were mottled and flickered.

"Sixth sister, I can't read a lot of big words, you let me go to the class, it's really too difficult for me!"

The dog said embarrassedly.

He looked at Zheng Ning's thin back, full of admiration.

"Dog, how can you say that?"

Zheng Ning looked at the dog in surprise, his brows furrowed slightly.

"How old are you, can't you learn? Zhou Chu was so old that he began to study and became a generation of famous generals. It is enough to hear the road and die at night. Don't delay yourself! ”

Zheng Ning took the reins, put on a straight face, and entered the courtyard of the back kitchen with the two inspectors.

The dog looked at Zheng Ning's back, scratched his head and walked away.

Although he is on duty now, he can actually stagger it completely.

He passed by the "classroom" of the "Lecture Hall", and several patrolmen outside were looking inside through the renovated windows.

The dog hurriedly ran over, gently squeezed out a slit, and looked into the "classroom".

"Cadets, the advantages and disadvantages of the bird gun have been talked about earlier, which is why the bird gun uses intensive shooting to ensure lethality, rather than random shooting."

Wang Heyao's eyes swept to the few patrolmen who were "eavesdropping" outside the window, and his voice began to get louder.

"Platoon shooting, it seems that the bird guns in the front row seem to have more casualties, but the fire guns are fired in turns, and the probability of casualties is basically the same. The dense position of the bird guns is also due to the short range of the firearms, and the distance between the two sides of the war ranges from within 100 meters to 40 or 50 meters. At such a close distance, the two sides often have to enter the hand-to-hand combat stage after two or three rounds of shooting. If the opposing cavalry appeared at this time, it would be a rout. This is also the reason why pikemen and sword and shield bearers have to be included in the army. ”

Wang Heyao glanced at the patrolmen below, and his eyes fell on Zhao Guohao.

"Zhao Guohao, you have to answer, what should you do if you want the bird gun to keep firing and maintain continuous firepower?"

The dog's forehead was sweating when he heard this, and he couldn't help but want to go in and answer.

"Instructor, the Bird Soldier can wear light and strong steel armor; Through training, the shooting time of the Bird Gun can be shortened; It can improve the bird gun, whether it can be replaced with a flint fire gun; It is also possible to install a sword on a bird's gun; However, the most important thing is to have courage, the courage to fight to the death! ”

Zhao Guohao replied with his head held high. After a month of training, he is already "black and hard", a typical straight man with a steel plate.

"Excellent! Sit down! ”

Wang Heyao nodded appreciatively.

Everyone has potential, and sometimes it will be more than you imagine, depending on whether it is stimulated.

"To make good steel armor, to make good swords, to build new flintlock firearms, this requires good steelmaking technology. Good steelmaking technology comes from good steelmaking talents. The flint firearm needs firearms talents who understand mechanical technology. This needs to open the wisdom of the people, it is difficult! ”

Wang Heyao shook his head and continued:

"I heard the old people say that there is another book in the former Ming Dynasty, written by a strange person named Song Yingxing, called Tiangong Kaiwu, which has various methods of iron smelting and steelmaking, gunpowder production, and firearms production methods. I don't know when, this heavenly work was listed as a banned book, and it was never seen again. ”

Wang Heyao's words made the patrolmen who had their lives shake their heads and sighed continuously.

Why else did it disappear, it's not "Qingfeng is illiterate, why do you flip through books"!

"Tiangong Kaiwu", first published in Ming Chongzhen ten years Ding Chou, a total of three volumes and eighteen articles, the whole book includes agriculture, handicrafts, such as machinery, bricks, ceramics, sulfur, candles, paper, weapons, gunpowder, textiles, dyeing, salt making, coal mining, oil extraction and other production technologies, by the world scholars called "China's 17th century craft encyclopedia".

After the second edition of "Tiangong Kaiwu" was engraved and published in the Shunzhi year of the early Qing Dynasty, it was banned and destroyed by the Qing Dynasty because of the appearance of the words "Beiyu" and "Yidi" in the book, and was lost in China.

It was not until the early years of the Republic of China that Song Yingxing's works, first of all his scientific work "Heavenly Creations", were noticed by Chinese scholars, but they saw the original work through Japan, which was neighboring to the east.

As for Song Yingxing, the author of "Heavenly Creation", he was full of loyalty, his brother Song Yingsheng took poison and martyred the country, Song Yingxing retired to eat at home, expressed his academic ability, focused on reading, spent his old age in poverty, and refused to leave the office.

Thinking of the people of later generations, they actually made Song Yingxing, a man with lofty ideals, into a big braid in the late Qing Dynasty and put it on the show, which is really unlearned and stupid.

"Now, let's talk about artillery. Artillery is the god of war, and the future war will be the war of artillery! There is a famous saying that you must remember, the truth is within the range of artillery! What does that mean, figure it out for yourselves! ”

Wang Heyao's words made Li Xingzhong below suddenly excited.

The truth is within the range of artillery!

This sentence, domineering! He loves it!

"Instructor, although this artillery is powerful, it is not as powerful as you say!"

He learns to fight with the skinny monkey. Artillery, I have practiced on the training ground a few times, and I also have a general understanding of the structure of artillery, and it seems that it is not as powerful as Wang Heyao said.

But a hollow iron cylinder, with a shotgun of only two or three hundred steps, how lethal can it be?

"You are a small cannon, and the power is naturally not great."

Wang Heyao pointed to a light Franc cannon on the desk and patiently explained.

"It's a shotgun, you can't hit it, but it can hurt a few people, at most a dozen people. Tessie has a kind of cannonball, which is a hollow iron sheet, which can explode when hit, relying on broken pieces of iron to kill and injure the other party, and it is useless to hide there. ”

Wang Heyao pointed to the cannon chamber and did not tire of it.

"If rifling is engraved in the chamber, the shell will rotate in the chamber, and it will hit farther, more accurately, and more powerfully. Now we are a front-loading smoothbore gun, and when the time comes, a rifled cannon will come out, and the shells that come out can explode, but not the god of war? ”

"Instructor, what is rifling, what is smoothbore, shells can explode?"

Li Xingzhong was ignorant and full of curiosity.

Thousands of artillery, Wang Heyao also dares to think!

"This is rifling, it is the soul of the barrel and the barrel, and the role of rifling is to give the warhead the ability to rotate, so that the warhead can still maintain the established direction after it is discharged!"

Wang Heyao drew it on the blackboard and took the trouble to explain them one by one.

The possibilities of young people are unimaginable.

"Thank you, instructor!"

Li Xingzhong was empowered, nodded again and again, and nodded unconsciously.

At this time, he had become accustomed to the class and forgot that he was Wang Heyao's sworn brother.