When Qin Fei and Cai Wei left Jinan City, the people of Jinan City reluctantly sent each other off, and Chen Zongbing was sent all the way out of the south of the city for more than 20 miles before being persuaded back by Qin Fei.

"Although Lao Chen doesn't have a lot of brains, he is also a fierce general, why wasn't he sent to fight Gao Zicheng, but he is still staying in Jinan City?" Qin Fei asked in the carriage heading south.

"The new Shandong Governor wants to send him, but he has been guarding Jinan City with us for more than four months, how can he be willing to fight his compatriots instead of fighting the Tartars? He secretly ordered his wife to come and ask me for an idea, and I asked him to pretend to be sick and have a high fever. ”

Qin Fei saw that she was talking to herself, and she was still reading a book with a book in her hand, she couldn't help but be annoyed, and snatched the book from her hand, "This carriage is so bumpy, and the car is dark, you are still holding the book, do you still want eyes?" ”

Cai Wei smiled, "Naturally, I just want to finish this book quickly." ”

"Didn't you start reading this book a long time ago, why haven't you finished reading it yet?" If he remembered correctly, when he woke up injured, she had this book in her hand, how many days have passed, and with Cai Wei's speed of reading, it is impossible that she has not finished reading such a thin little book in more than ten days.

On the blue cover of the book was only the word "mathematics", and when he opened it, he saw that on the first page there were four small words written on it: "Original Book of Geometry". When he flipped down further, he saw a triangular or quadrangular picture from time to time, with large paragraphs of text written on the side, and he recognized every word, but when those words were put together, he was very dizzy to see.

"What kind of book is this? What do you do to see this Rausch? "His wife has always looked at some historical books and words, and hundreds of schools, why did she suddenly change her temperament and look at this kind of heavenly book?

"This is not a book from heaven, this is a book of arithmetic translated by my father from a certain country in Xiyi, which studies the relationship between the sides and corners of these different figures, so the name is called "The Original Book of Geometry"

Qin Fei's heart was even more puzzled, "You have always disliked arithmetic, what are you doing reading this geometry book?" ”

"I was thinking that maybe I could find a solution in this book to make our artillery □□ no longer bomb frequently."

Qin Fei pondered for a moment, his eyes flashed twice, and he raised his eyebrows and smiled: "But is it for me?" ”

Cai Wei looked at his still pale face, and her right hand gently stroked his wounds one by one, although the outer robe covered all those wounds, only revealing the eye-catching white bandage on the back of his head, but she clearly knew his wounds, three serious injuries, eighteen wounds deep to the bone, and fifteen minor injuries, a total of thirty-six injuries, where each one was injured.

She will not forget the reason for the thirty-six wounds on his body, large and small, which could not hurt him with the sharp arrows and artillery of the Tartars, but he was injured like this by the artillery on his own city. If the fragment of the barrel that had hit him in the chest had been a little bit higher, he would never have opened his eyes again, and she would have lost him forever.

She would never allow that to happen again.

She hugged him cautiously, "Yes, I'm here for you, I don't want you to be careful not only of the arrows and artillery fired from under the city, but also the □□ artillery in the hands of our own soldiers when you stand at the head of the city and command." I don't want those □□ artillery to blow up and hurt you anymore, I don't want you to get hurt anymore, never again! ”

Qin Fei looked at her slightly trembling body, and suddenly realized that although after he was injured, Cai Wei did not show the slightest fear and panic in front of him, and always looked calm and calm, but in fact, deep in her heart, she was like any ordinary man in this world, when facing the serious injury and dying of her loved ones, she would be afraid and afraid, and she would have a deep sense of powerlessness.

But what makes her different from those ordinary people is that she is no longer panicked and scared in her heart, but she must be calm and calm in front of him.

Because, she wants to reassure him.

She would even turn her panic into motivation to study how to stop the cannon from exploding, just so that he would not suffer the same injuries again!

If you have a wife like this, what regrets do you have!

"Ah Wei," he said softly stroking her back, "you know that I have never broken my promise to you. Since I swore to protect you for the rest of my life, even if I occasionally suffered some minor injuries, it didn't matter, and before I fulfilled my promise to protect my life, the king of Hades himself came to take me, and I would kick him back to the underworld. ”

"You have to think about the way to make the artillery □□ no longer explode, I won't stop you, if this method can really be studied, I am not the only one who will benefit, I don't know how many soldiers in our Great Qin Army will benefit from this, no longer have to be afraid to fiddle with the □□, the overall combat power will also be greatly improved, this is equivalent to a good thing that is beneficial to the country and the people, I will not stop you from doing it." It's just that no matter how anxious you are, you can't ignore your own body, these days, you have worked hard to take care of me, and then you have exhausted yourself thinking about this nerve-wracking thing, wouldn't it be even more painstaking. ”

"Besides, this kind of problem is not something that you can solve at once by relying on your own efforts, and when we get to Jinling, recruit more skilled craftsmen and craftsmen who make these □□ of artillery, and everyone participates in the research together, wouldn't it be better to brainstorm than if you exhausted the wisdom of one person?

Qin Fei said that she didn't understand this truth, in fact, the two of them had been thinking about the improvement method of reducing the □□ artillery bore since early on. It is really because whether it is daily training or fighting against the Tartars, the frequent explosion of □□ artillery is an extremely headache.

Since the Northern Qin Dynasty had gunpowder, followed by the production of □□, hundreds of years of continuous improvement, decades ago the imperial court saw that the power of this □□ was greater than □□, especially the production of a □□ cost more than the □□ money, in the official system that should be handled, there is naturally more oil and water, so the officials of the military department unanimously asked to vigorously make □□ to replace the □□ used by the soldiers.

It is because of the fact that almost seventy percent of the soldiers in the Great Qin army are carrying a □□, and the bows and arrows that were extremely effective against cavalry □□ were abandoned. If this □□ is still constantly improving, it is not so easy to blow up, or if it increases the accuracy of each shot or shortens its ignition time, it is indeed more powerful than □□.

However, because of the government of the Yan Qin Dynasty in the past 20 years, it is rare to allocate some silver to the Firearms Bureau, and there is not much left. Therefore, not to mention improving their deficiencies and raising the standard of making firearms, even the materials used to forge firearms, such as copper, iron, gunpowder, and other materials, are shoddy, cutting corners, and cutting corners, so that the □□ artillery guns that were built later are frequently blown up, and often before a single shot is released, the person who released the gun is blown up first.

As a result, many soldiers did not dare to light the fire and shoot, but they did not dare to disobey the orders of the generals and light the fire, so they only cared about shaking their hands and panicking, and they could not care about aiming at the head. As a result, when the Tartar cavalry rushed over, half of the Great Qin soldiers were killed by their own □□ when they released their guns, and the other half easily released a row of guns, because the accuracy was not good, the Tartar cavalry armor was tightly protected, and they did not knock down a few, and before they could light the fire again, they had been shot into hedgehogs by the Tartars.

In order to change this tactic that was extremely unfavorable to the Qin army, Qin Fei and Cai Wei gathered a group of craftsmen as soon as they arrived in Jinan, and according to the method of repeating crossbows written in Cai Wei's father's book, they made a batch of ten consecutive crossbows, which could fire ten arrows at a time. While they were busy building these ten crossbows, they did not forget to continue to develop firearms, but most of the craftsmen they could find were stupid and could not help much. Following the Tartar soldiers to the city, the battle was tight, and they couldn't care about spending more energy on it for a while.

It wasn't until Qin Fei was injured by the exploding cannon that Cai Wei learned from the pain and decided to figure out this problem herself. She remembered that there were several books in the box left to her by her father, all of which were translated from the Xiyi countries, so she re-examined them, picked out all the books she thought were useful, and studied them carefully.

Although she doesn't like these mathematics and physics, because she has made up her mind and studied hard, she has figured out some truths for her in the past ten days, and she is learning at this time, where is she willing to listen to Qin Fei's persuasion. Buyi said: "Give me the book quickly, I will quickly figure out the book, I will figure it out first, and then teach it directly to those craftsmen, wouldn't it be twice the result with half the effort?" ”

Qin Fei didn't listen to her, and directly put the book into his arms, "No matter how big it is, it can't compare to your body, and you will only be allowed to study for an hour every day in the future, not more!" ”

So on the way south to Jinling, the two of them were fighting wits and courage in the small carriage.

Cai Wei tried her best, and tried all her tricks to read those Xiyi's books of arithmetic and physics under Qin Fei's nose for a while, but Qin Fei was stuck in time, once the time he set was exceeded, Cai Wei could still hold the book firmly in his hand, and he also had a way to make her unable to read the book. And often at the end of the day, there will always be some strange sounds coming from the car.

The people who were waiting for His Royal Highness the King of Linchuan were already surprised by this, but the doubts in the hearts of the black-clothed guards who were ordered to escort the King of Linchuan back to Beijing became bigger and bigger, and they were all injured like that, how could they still toss those noises in the car, could it be that his hidden disease had been cured?

Cheng Fei, the leader of the black-clothed guards, hurriedly passed the suspicious place they found His Royal Highness King Linchuan to their eldest boss An Gonggong, and didn't want to send a reply from Jinling three days later, but a shocking news suddenly came from Jinan.