Mrs. Zheng was in an extremely good mood, he had already set Wu Ji as the future master of arithmetic, and asked Niu and Yang to bring the account book, and he read it to Wu Ji, and Wu Ji calculated, and the two cooperated and complemented each other.

Huangfu Song was busy sorting out the account books, while Niu Yang and the others only had miscellaneous parts, such as moving the account books, serving tea and water, and it fell on the two of them.

It wasn't until it was dark that Wu Ji was tired and sweaty, and then he left.

Today, Wu Ji was really tired, so he didn't go to the main bookstore, but rested at home. Guixin County is a small county town, and there are not many accounts, so it can't withstand Wu Ji's abacus at all, and resting for a day is not the same thing at all.

"This is a terrible body! Gotta get a good workout! If only I knew qigong, it would be great, I could practice qigong and strengthen my body! Wu Ji leaned back on the chair, drank tea, looked at the sun hanging high, and felt very sorry for the warmth on his body.

"Brother Ji, are you okay? How did that marble come about? We've got saltpeter, sulfur, and charcoal ready! As soon as Wu Jian saw Wu Ji rolling his eyes to pass the time, he came over: "Sister-in-law said, the marble is very powerful!" I'd love to see it. ”

"Are you ready? Is there any need to wait? Here it goes! "What Wu Ji is looking forward to is to make the bomb and make a lot of money, as soon as he heard this, his body was not sour, his strength came, and he jumped up.

"Brother Ji, are you really okay?" Wu Jian looked at Wu Ji with some surprise.

"Do you think I'm in trouble?" Wu Ji was in good spirits.

"Hee-hee! It's time to make marbles. Wu Jian heard Yang Xiuxiu talk about the bear hunting, and he was the most anxious, and he couldn't wait to make a marble right away.

When the two entered the house, they saw Yang Xiuxiu distributing saltpeter, sulfur, and charcoal according to the ratio of three, three, three, and she was planning to mix the strongest gunpowder.

"Xiuxiu, slow!" Wu Ji knew her thoughts at a glance and hurriedly stopped.

"Wu Lang! How did you come to be? Go and rest. When Yang Xiuxiu saw Wu Ji come in, she was both surprised and worried.

"It's not a business!" Wu Ji walked over quickly and said, "This time, I can't use this formula, I have to use a formula with little power." ”

"Less powerful?" Yang Xiuxiu was very puzzled, and her eyes were full of doubt.

"This is used to sell money, not too powerful, but less powerful." Wu Ji said his intentions.

"Brother Ji, why don't you use the powerful ones instead of the less powerful ones?" Wu Jian embodied the true character of being a scholar who was not ashamed to ask, and immediately asked it.

If you sell it with great power, it will be popular. If the power is small, sell it, who will want it? It's common sense. Wu Ji is good, but it's the other way around, which is very puzzling.

"Do you think, if I sell the most powerful as soon as I come, doesn't that mean that there will only be such a kind in the future? After a long time, who will buy it? Wu Ji explained to the two: "Sell the less powerful ones first, the time is almost up, and then exchange them for the powerful ones, isn't this a long-term deal?" ”

The statement "this ......" is too beyond the imagination of the two.

"You think, if you eat food alone, if you eat the best as soon as you come, after a long time, he will feel tasteless. If you don't give him the best food, but give him the average food, and after a while, give him some good food, he will feel delicious and won't be greasy! This is also the reason for doing business! Wu Ji made an analogy.

"Will this work?" Yang Xiuxiu's business experience for Wu Ji was stunned, her mouth opened wide, and she couldn't speak.

Wu Jian slapped his forehead and shouted: "Brother Ji, you are so cunning!" You have calculated people, and you want people to say good things about you! I'm getting a chill on my back, so cunning! ”

This is indeed a cunning, and Wu Ji has the potential to be a businessman.

"Ah! Doing business, no profit can not be early, which trader is not a cunning person? No business, no annihilation! "Wu Ji has accepted it in a big way, and a copy should be like this.

"Wu Lang, when will you be able to do business?" Yang Xiuxiu's eyes straightened when she heard it, although what Wu Ji said, although it was a bit ear-piercing, it was definitely an authentic business experience, and she couldn't help but be a little stunned.

"Didn't I say that? I've learned a lot about this disease! It's just one of them. Wu Ji had already laid the groundwork for lying.

At that moment, under the guidance of Wu Ji, Yang Xiuxiu and Wu Jian began to dispense gunpowder. This time, the saltpeter:sulfur:charcoal is 6:2:2, and it is no longer a three-three-three ratio.

The power of this formula is not as good as the three-three-three ratio, but it is not weak, and it is much better than the gunpowder of the Song Dynasty, paving the way for future upgrades.

Wu Jian felt very curious, the most excited, busy with everything, almost nothing happened to Yang Xiuxiu and Wu Ji. It wasn't until he was so busy that he was sweating profusely that he was done, and his face was excited, and he felt that it was the most fun thing in the world.

After the gunpowder is prepared, you need a container, Wu Ji then remembered that the night before yesterday, before he went to bed, Zhang Daniu grinded him and asked what he wanted to cast, and he told him that he wanted to cast a hollow iron ball the size of a fist, I don't know if he did it?

If you do it well, you can test the real power of the bomb. The bomb that blew up the bear, although it was powerful and could kill the bear, was not a real bomb. Because it is wrapped in oiled paper, it is not very powerful. Moreover, if it explodes in the mouth, as long as the bear is fooled, it is not a problem to blow up the bear.

If it doesn't explode in the mouth, but on the bear's body, it may not kill the bear.

"Wu Lang, are you going to use this to make marbles?" Just as Wu Ji turned his mind, Yang Xiuxiu took out a fist-sized hollow iron ball and put it in front of Wu Ji.

Wu Ji took a look, this was cast iron, and it was polished, which was very smooth. Take a closer look, the thickness is uniform, although there are still some uneven places, in the Song Dynasty can have this level, not bad. Its form is exactly what Wu Ji pointed out to Zhang Daniu.

"Master Zhang made it? So fast? Wu Ji was a little surprised: "It's a good job!" ”

"The night before yesterday, Master Zhang didn't rest, but rushed to the model overnight, made it, and then polished it smooth, it was last night." Yang Xiuxiu complained a little: "I urged him a few times and asked him to rest." Master Zhang said, this is what you have to do, and he can only rest if he has to do it. ”

"This ......" Wu Ji was a little speechless, he was right, but he didn't have to be in such a hurry, and he didn't need to be in such a hurry.

"Master Zhang said, you must be of great use in the blacksmith shop, he will make it first, and then it will not be too late to rest." Yang Xiuxiu sighed: "I urged him a few times, but he didn't want to stop." ”

"In the future, it can't be like this." Wu Ji's face froze.

There is also a lid, Wu Ji tried to use it, and it is very consistent with cast iron, this Zhang Daniu is careful and has good skills, leave him, that's right.

There is one more thing to be done now, and that is the fuse. The bullet is detonated by the friction between the fine porcelain fragments, and it is not possible to make a bomb, and another way of detonation must be used.

Wu Ji knew a lot about this detonation method, but he took the simplest fuse. The reason why the fuse was used instead of automatic detonation was that Wu Ji's potential to destroy merchants played a role. The advantage of this is that there is one more opportunity to upgrade, and there is one more opportunity to make money, and Wu Ji will definitely not miss it.

Even if you use a fuse, the power of the bomb is much more powerful than the swords and guns of the Song Dynasty, so you don't have to worry about the power.

The fuse is not difficult for Wu Ji at all, it is a very simple matter.

After making the fuse, Wu Ji filled the iron ball with gunpowder, pressed the fuse, and then sealed it with a lid. If you want to sell it, you also need to go through moisture-proof and waterproof treatment, Wu Ji This is for testing, and there is no need for this process, and a bomb is born in this way.

"Wu Lang, this can't be called a marble, right?" Yang Xiuxiu looked at the bomb, it was very different from the marble, one was more iron shell, and the other was more fuse, if it was called a marble, it would indeed be inappropriate.

"Yes! It's going to have to be a different name! Wu Ji bowed his head slightly and said, "Be sure to choose a name that is loud and easy to remember." It's like a thunderbolt, well, let's call it a thunderbolt! ”

Thunderball, a resounding name, a sharp and incomparable weapon, was born!