Ten taels of silver and a thunderbolt, Wu Ji is profiteering. The cost is less than one tael of silver, saltpeter, sulfur, charcoal, cast iron, labor, add up, but count the money and silver, each net profit of nine taels of silver, there is no problem, except for huge profits, indescribable.

Of course, this is still based on the fact that Wu Ji did not sell at a higher price. If Wu Ji's capital is strong and there is enough sales network, the price will definitely be higher. It's just that this is not something that Wu Ji can do right now, and he can only give Qi Dabao a certain amount of money.

Eating meat and drinking soup at the same time is certainly a good thing. However, in the buying and selling arena, this is the problem. If others have no interests at all, how can anyone help you make money? Therefore, Wu Ji gave a certain sweetness to Qi Dabao in line with the idea that he would eat meat and Qi Dabao would drink soup.

"Oh my God! Ten taels of silver each! Yang Xiuxiu patted her little chest, her pretty face was full of surprise, if it wasn't for Wu Ji to say it, she would definitely think it was a lie.

"Brother Ji, let's do it! Do more, and sell for money! Wu Jian was so excited that he couldn't stop rubbing his hands, as if he wanted to do him one hundred and eighty immediately.

"Yes! Yes! Yang Xiuxiu couldn't help but roll up her sleeves, revealing two white and tender wrists, ready to play at any time.

Wu Ji waved his hand to stop them, and said, "You can't do it now!" ”

"Can't do it? Why? Such a lucrative business, you can't wait! Wu Jian was very anxious.

Yang Xiuxiu stared at Wu Ji, waiting for Wu Ji to give an explanation. She knew that Wu Ji must have a reason for doing this.

Sure enough, Wu Ji touched Wu Jian's forehead and said with a smile: "Do it, you must do it." However, the three thunderbolts we made had a flaw, that is, they did not leave one hand and were easy to disassemble. If we dismantle it, we will reveal our secrets. Therefore, what we need to do now is to add something to it, so that people cannot disassemble it, so as to keep the secret. ”

Wu Ji tried one by himself, and went to Qiyun Club to use two, a total of three. These three, Wu Ji was present, and they were used on the spot, so there was no need to worry about leaking secrets. The ten sold to Qi Yun Club are different, if they can't be tampered with, Wu Ji's secret won't be kept for long, and it will be cracked.

The ancients were far inferior to Wu Ji in terms of knowledge, concepts, and scientific and technological level. However, among them, there are also many smart people, once they are given the opportunity, it may not be impossible to crack Wu Ji's secret, this thing must be prevented.

Confidentiality is a top priority!

"Brother Ji, how can you keep it a secret?" Wu Jian is also a smart person, and he immediately understood, and he was a little worried.

"It's okay!" Wu Ji had already thought about keeping it secret, so he just had to implement it: "I'm going to see Master Zhang." ”

At that moment, the three of them left the house and rushed to the blacksmith shop. When I arrived at the blacksmith shop, I saw Zhang Daniu selling ironware and casting alone, busy and sweating.

When Wu Ji went down to the shop, he put down the farm tools, vegetable cuts, and firewood knives, and Wu Ji planned to sell them out, so it would be over.

"Master Zhang, you take a break and take a breath." Zhang Daniu is really a sincere person, he is not lazy in his work, Wu Ji has a special impression of him, he came to the front of the cast iron ball, looked carefully, it was very good, and he was very satisfied.

"Boss, how can I rest if you pay me money to work? The wages you pay are much higher than those of striking iron! Wu Ji's salary is several times that of iron, Zhang Daniu is very satisfied with this salary, and when he mentions it, he can't help but shout.

"Master Zhang, being angry and being lazy are two different things, don't mix them up. When you are tired from work, you should take a break. Wu Ji asked Zhang Daniu to rest: "Master Zhang, you take a breath first, I have something to say to you." ”

Wu Jian was busy handing a bowl of hot water to Zhang Daniu, Zhang Daniu took it, came to Wu Ji's side, and asked, "Dongjia, what's the matter with you?" You just tell you to do it. ”

"Would you do this?" Wu Ji took out a picture with something drawn on it.

This is a firing device, Zhang Daniu saw a little unclear, so he opened his eyes and looked at the old man for a while, and then said: "I don't understand much, and I seem to be able to understand some, but not much." ”

is really a sincere person, honest, and said everything in a lot. Wu Ji had to explain to him, and after an explanation, Zhang Daniu understood, nodded and said: "Dongjia, this matter is a bit complicated, and it can only be forged." ”

This firing device, in the Song Dynasty, did not have the tools of lathes, and could only rely on forging. This was a test of the blacksmith's skills, and Wu Ji asked, "Master Zhang, can you do it?" ”

"Can be done. The first few are not too familiar, and I have to be familiar with them before I can do it well! Zhang Daniu is still in the spirit of sincerity.

"That's good!" Wu Ji was very in agreement with what he said, and it was inevitable for him to practice.

Zhang Daniu didn't say a word, put down the bowl, came to the anvil, and began to make preparations, burning the stove and burning the iron. Then, it is to clamp the iron, pick up the hammer, clink and beat.

This is the first time Wu Ji has seen him strike iron, and he is skilled in hammering and is a good hand. The firing equipment is focused on the word fine, the thing is not big, and it is not too complicated, under Zhang Daniu's careful forging, it is formed little by little.

It wasn't until Zhang Daniu was so busy that he was sweating profusely that the parts of the first firing device were ready. Wu Ji took a look, it was not bad, it still needed to be improved, this had to wait for Zhang Daniu to get acquainted, and he couldn't be in a hurry.

As soon as Zhang Daniu saw Wu Ji put aside the firing device parts, he knew that he was still not satisfied, took a breath, and then forged. After hitting five of them, Wu Ji was satisfied, and took the firing device to test.

The firing device must be foolproof, otherwise, there is a risk of leakage, and each one must be tested, in modern terms, that is, "full inspection".

Assembling the parts together is a firing device, which is not difficult and very fast.

The results of Wu Ji's test are not bad, whether it is soaking, pulling, or dismantling, the fuse will be ignited. On the thunderbolt, lighting the fuse is equivalent to detonating the thunderbolt, and whoever does not have a good heart to disassemble it will die.

Wu Ji was still satisfied with the test results, and came back to praise Zhang Daniu: "Master Zhang, you did a good job, just do it!" ”

"Huh!" Is there anything more joyful than being praised by the owner? Zhang Daniu let out a string of happy laughter, and he worked harder.

For every time he forged one, Wu Ji tested one. In the first few cases, Wu Ji tested by himself, and later instructed Wu Jian and Yang Xiuxiu to test.

This kind of test is not difficult at all, and Wu Jian and Yang Xiuxiu quickly mastered it. As soon as they mastered it, there was nothing to do with Wu Ji, and someone rushed to do the work, and Wu Ji only needed to give instructions.

It took a whole day to make ten sets of firing devices.

Zhang Daniu has to make both firing devices and casting, and he must be too busy, Wu Ji asked Zhang Daniu to recommend a blacksmith who is honest and reliable, has a solid mouth, and has good skills.

Zhang Daniu thought for a while and recommended a blacksmith named Duan Dapeng. Wu Ji asked Zhang Daniu to call him, and after Wu Ji inspected, he found that this person was comparable to Zhang Daniu, who belonged to the kind of person who was particularly sincere and had good skills, so he hired him.

At this point, Wu's military industry has Zhang Daniu, Duan Dapeng, and Qiao Dayuan, who has not worked, and three blacksmiths. plus Wu Jian, Yang Xiuxiu, and Wu Ji himself, there are six people.

Even though there were only six of them, they were decent.

The groundwork has been laid!

The most troublesome thing about the whole thunderbolt is this firing device, which is labor-intensive and time-consuming. However, with any advanced weapon, secrecy is indispensable and has to be done. With this firing device, whoever dismantles will die! In this way, the secret will be kept.

In addition, when Wu Ji also wants Zhang Da Niu to cast, when he scatters molten iron on the ground, there will be a lot of iron sand and iron sheets, all of which have various shapes, some sharp and some blunt. Packed in an iron ball, once it explodes, the power of the thunderbolt will increase greatly, which is tantamount to a killing net, and the coverage is not small