Xu is the lack of talents proficient in arithmetic near Huang County, or perhaps the news that Donglai Mansion has recruited lecturers has not yet spread. In short, since Cai Ji came out of the "Han Xin point soldier", no one has come to apply for the job for several days. She was so depressed that she had no choice but to comfort herself that her staff should rather be lacking than excessive, while continuing to serve as a full-time teacher in the martial arts hall. However, just as Cai Ji was guarding the small tree of the lecture hall and waiting for the talents to be sent to the door, Duan Zhi sent someone to invite her to come over to the house. Thinking of the arduous task given to Duan Zhi before, Cai Ji immediately came to his senses. So without saying a word, she took an ox cart and rushed to Duanfu. However, this time, Duan Zhi did not go out to greet him personally, but asked the servant to lead Cai Ji directly into his small courtyard, which can be called a workshop.

As soon as he crossed the small courtyard, Cai Ji smelled a familiar smell of gunsmoke. Obviously, our Second Master Duan should have just done something here. But just as Cai Ji was about to enter the house to inquire about the progress of gunpowder development, he saw Duan Zhi running out in a hurry, and asked at her, but one thousand and forty-nine? ”

"What?" Cai Ji was asked so coldly by Duan Zhi, even if he was in place.

How do you know that Duan Zhi frowned, and still said to himself with the donkey's head not talking to the horse? Isn't it one thousand and seventy-three? No, I've counted it several times, how can there be? ”

Seeing this situation, Cai Ji, who really couldn't figure out what Duan Zhi was talking about, had to ask with a wry smile, "Brother Duan, can you explain what you mean by this thousand and seventy-three?" ”

"Han Xin ordered the troops. Didn't you post that Han Xin at the gate of the yamen and the gate of the city, and ask Han Xin how many people were left? Duan Zhi raised his head and asked rhetorically with a slight anger. Obviously, he was dissatisfied with Cai Ji's fact that he was the author of the question, but he had no impression of his own question.

And Cai Ji was reminded by Duan Zhi like this, and also remembered that Han Xin's answer to the soldiers was indeed 1073 people. So she hurriedly apologized and said that she had forgotten about it. No, the answer is as Brother Duan said, Han Xin still has one thousand and seventy-three people left. ”

"I'll just say one thousand and seventy-three." Duan Zhi clapped his hands and laughed like a child.

However, seeing Duan Zhi's triumphant look, Cai Ji asked with a little worry, Brother Duan, did he tell others about this answer? ”

"Shiba would do such a disappointing thing." Duan Zhi waved his hand and said, "If others want to answer, they naturally have to rely on calculations." However, Zhi didn't expect that Cai Xiandi was also proficient in "Sun Tzu's Arithmetic". ”

Cai Ji couldn't help but breathe a sigh of relief in her heart when she heard that Duan Zhi didn't mean to announce the answer, and wanted to rely on Han Xin's question to fool talents. As for the "Sun Tzu Sutra" mentioned by Duan Zhi, although Cai Ji had heard of it, she had not read it, so in order not to put an oolong in front of professionals, she had to explain half-truths and half-truths not to hide it from Brother Duan, in fact, Ji had not read "Sun Tzu's Sutra", but had done this question when he was a child. Ji still remembers the mantra to solve this problem. ”

As soon as Duan Zhi heard that there was a formula for solving the problem, he couldn't help but ask curiously, "The formula?" Let's hear about it. ”

Cai Ji saw Duan Zhi's posture of breaking the casserole and asking the end, so he had to recite the mantra he had learned when he was a child in the previous life, and the three of them walked together seventy rare, five plum blossoms twenty-one branches, and seven sons were reunited and half of the moon, except for one hundred and five. ”

Although Duan Zhi's personality is still like a child, his IQ is not low. Therefore, without Cai Jiduo's explanation, Duan Zhi has already heard the meaning of this poem: multiply the remainder obtained by dividing by 3 by 70, multiply the remainder obtained by dividing by 5 by 21, and multiply the remainder obtained by dividing by 7 by 15, and the result is greater than 105, subtract the multiple of 105, so that the number is sought. So he clapped his hands and said, "Wonderful, wonderful!" This poem is a wonderful way to solve the problem. ”

Duan Zhi was fortunate to have learned a trick to solve the problem. But at this time, Cai Ji was somewhat depressed. If she wants her, she is busy for the sake of black powder. Don't get it to the end, Duan Zhi just wants to tell him that he has solved the problem and wants to come to Wutang to be a math teacher. Thinking of this, Cai Ji couldn't help but ask Duan Zhi tentatively, and asked Brother Duan to find Ji today just to talk about the martial arts? ”

"Martial arts? What's the matter? Duan Zhi asked sideways.

"Brother Duan, doesn't you know that Ji came up with this question to recruit masters for the children of the Martial Arts Hall?" Cai Ji asked rhetorically.

"There's such a thing." Duan Zhi nodded suddenly, but then frowned again, and taught Taoist children to read very boringly, Zhi didn't want to be a master. ”

Dare you come to me just to solve the problem. After listening to Duan Zhi's words, Cai Ji completely understood that chickens and ducks were the same.

However, just when the disappointed Cai Ji wanted to go home, Duan Zhi suddenly changed the topic to Cai Xiandi's boring pre-emptive foresight. Brother Xian, come and see the new thunder and fire I made. ”

"Oh? Brother Duan has already changed it, don't skip words. As soon as Cai Ji heard that there was such a stubble, he immediately came to his senses again, "Take it out and take a look." ”

Duan Zhi rarely met a like-minded person, so he naturally wanted to do his best to show himself. But I saw him trotting, took out two bamboo pipes from the house, and handed them to Cai Ji, Daoxian brother, please see, this is the newly improved thunder and fire. In order not to blow up the bamboo pipe, Shiba deliberately reduced the dosage. ”

Oh, that's the fireworks. While listening to Duan Zhi's introduction, Cai Ji secretly speculated about the nature of the bamboo pipe in his hand. However, it is still necessary to try how effective it is. Therefore, even if Cai Ji mentions Brother Duan to Duan Zhi, it is better to try the effect. ”

"Okay." Duan Zhi simply nodded, then took out the flint from his arms and directly lit the lead on the bamboo tube in his hand. I heard a swish of a flame burst out of the bamboo tube. However, Duan Zhi was not afraid at all, and even took it in his hand and drew a large circle in the air.

It's a big firework. Cai Ji commented in his heart. However, after thinking about it, she felt that this thing was still not used as a signal stick for the navy.

But Duan Zhi proudly showed off to Cai Ji, "The thunder-spit fires that Kezhi made before with this thing are long and easy to carry. ”

was reminded by Duan Zhi like this, Cai Jiye, this bamboo tube fireworks, did burn for a long time. It seems that Duan Zhi has indeed put in a lot of effort to improve. It's just that there are some problems with his thinking, and the director's new work is not practical. In order to prevent the Donglai firearms researcher in front of him from going further and further down the wrong road, Cai Ji immediately criticized mercilessly, "Ji also knows that Brother Duan has put a lot of thought into this matter. However, as far as weapons are concerned, this thing is not powerful enough to kill enemies, and arson is not as far as a rocket. ”

As soon as Duan Zhi heard Cai Ji's comment, his originally proud face immediately collapsed. However, he didn't get angry or argue, but asked Cai Ji anxiously that Brother Xian was really so bad? ”

"Not badly. At least it can be used by the Navy. Cai Ji turned to Duan Zhi and comforted, "Actually, Brother Duan can open his mind and not just stick to arson. For example, Brother Duan can try to add marbles to this bamboo tube to make the marbles erupt like flames. ”

"Let the marbles erupt like flames? Isn't that a fire bomb? I'll have to go back and try it. Duan Zhi, who had broadened his thinking, said with great interest.

And Cai Ji thought to himself, I don't expect you to invent the assault rifle all at once, but at least develop the fireflower first. In the future, it will be good for the Donglai army to stage a spectacular scene of "an arrow piercing the clouds, thousands of troops and horses will meet each other". However, no matter how much fireworks are studied, they can only do some auxiliary work in the military. Explosives were the purpose of Cai Ji's trip, so she then asked Duan Zhi about Brother Duan, since he had improved the thunder and spitting fire. I wonder how the gunpowder recipe has been studied? ”

When Duan Zhi heard Cai Ji mention the gunpowder formula, he couldn't help but show shame and said that he didn't hide it from the virtuous brother, and Zhi had already prepared gunpowder several times according to the recipe you gave. However, although it is loud and can set fire, it always blows up the container of the charge. Therefore, Zhi Zheng thought of modifying the recipe. ”

"Blowing up the utensils?" Cai Ji was stunned at first when he heard Duan Zhi's explanation, and then slapped his thigh and shouted, "It's right to blow it up!" ”

"But isn't that going to hurt people?" Duan Zhi, who couldn't turn the corner for a while, asked puzzled.

"The use of this gunpowder is to blow people up and destroy things. It would be nice if you could blow down the walls and gates at once! Cai Ji was so anxious that he stomped his feet. I thought I dared to love, and Duan Zhi has been researching reducing the power of explosives in the past few days.

"Blowing up the walls? I see. Duan Zhi slapped his head and suddenly realized, "I didn't expect it." ”

"Brother Duan is loyal, and he has never made weapons, so it is not surprising that he can't think of these uses for a while." Cai Ji calmed down a little, and said in an orderly manner, "But as long as you think about how to make this thing hurt people and destroy things, you won't take a detour." ”

"Thank you Brother Xian for your correction, Zhi almost broke a big deal." After hearing this, Duan Zhi respectfully leaned over Cai Ji to show his gratitude.

Seeing this, Cai Ji immediately stepped forward to help Duan Zhi and said that Brother Duan should not blame himself. Studying new weapons inevitably requires trial and error. However, gunpowder and firearms are quite dangerous. Brother Duan can get it, don't hurt it. ”

"Thank you for your concern. Shiba has its own measure. Duan Zhi said and glanced at the fireworks in his hand again, and couldn't help but throw them on the ground angrily, saying that this kind of waste is still ruined!

"Brother Duan, don't ruin! Don't ruin! As soon as Cai Ji heard that Duan Zhi was going to destroy the fireworks in his hand, he hurriedly stepped forward to stop it, saying that this thing could be used by the navy. I don't know how much Brother Duan has done this time? ”

"Really useful?" Duan Zhi asked with little confidence.

"It works." Cai Ji nodded.

Duan Zhi saw that Cai Ji didn't mean to lie to him, so he took out a bundle of bamboo tubes from the house and handed it to Cai Ji, and instructed him on the matters that should be paid attention to when using it. Cai Ji greatly encouraged Duan Zhi after agreeing, hoping that he would not be discouraged and continue to work hard, and then got up and left Duan Mansion.

However, after leaving Duan Mansion, Cai Ji did not go back to Taishou Mansion directly, but hurriedly asked people to drive to Longkou Port outside the city. It is said that this Longkou Port is located on the south shore of the Bohai Sea, northwest of the Jiaodong Peninsula, and across the sea from the Liaodong Peninsula. The natural conditions of this port are good, there is a natural sand bar on the island in the north as a barrier, surrounded by golden sand beaches in the south, it is not frozen or silted, and it has always been called "stable oil basin". Now, after a few days of repair, the current Longkou Port has become the base camp of the Donglai Naval Army. Therefore, when Cai Ji arrived, he saw that a water village with flags had been built on the desolate tidal flats in the past, and several warships were moored in the harbor, all exuding a solemn atmosphere.

As soon as Tai Shici and Guan Cheng heard that Cai Ji was coming, they immediately led a group of leaders of the water and land armies to welcome Cai Ji into the water village. Because Cai Ji came in a hurry and did not notify him in advance, after entering the big tent, Tai Shici hurriedly withdrew the idle people and others, and asked Cai Ji in a deep voice Does Xiaofujun have something important to come today? ”

Cai Ji heard Tai Shici ask this, and then looked at Guan Cheng's puzzled expression on the side, and knew that it was a bit reckless to come directly to the water village. So she hurriedly showed a smile and waved at the two, and Dao Ji came today just to come and see Xinshuizhai. By the way, I'll pick up some more for you. ”

As he spoke, Cai Ji placed the wrapped bundle of fireworks in front of everyone. Guan Cheng saw that Cai Ji had made a special trip to Shuizhai just to bring them such a copy, so he couldn't help but ask the lord curiously, what is this? ”

"Last time, I said that I would act in the name of the Yellow Turban. Naturally, this mansion is here to send demon magic for you. Cai Ji said as he took out a firework from the package. Then, without explaining to the two, he directly lit the lead with a fire breaker. I only heard a whistle, and a bunch of fireworks immediately burst out of the bamboo tube.

This is also thanks to the fact that the big tent of the water village is big enough and high enough, so Cai Ji dares to openly set off fireworks indoors. But the other two weren't as calm as she was. Tai Shi Ci was so shocked that he pushed a step back, and Guan Cheng, who spoke out of the pirates, was even more frightened and shouted, "Demon law!" Sorcery! ”

Cai Ji saw that the two big men in front of him were frightened by a firework, and he couldn't help but laugh and said, "Zifeng, do you want to try this demon method?" ”

Saying that, Cai Ji handed the fireworks in his hand to Guan Cheng. Guan Cheng first cringed a little at this can breathe fire. can see that Cai Ji is fine with his bare hands, and the momentum of the fireworks has decreased. So he boldly took the bamboo pipe in his hand. To his surprise, although the bamboo pipe was spewing flames, it was not hot when it was picked up. This immediately aroused Guan Cheng's playfulness, and I saw him waving a bamboo pipe and drawing a circle with fireworks.

This frightened Cai Ji on the side, "! Don't burn the tent! ”

was shouted by Cai Ji, Guan Cheng was immediately so frightened that he threw the bamboo pipe in his hand to the ground. Fortunately, the fireworks had burned out at this time, so there was no oolong that caused the big tent to burn.

However, at this time, Tai Shi Ci had already seen that Cai Ji's so-called demon magic was actually just a special kind of torch. So he picked up a firework and looked at it carefully before asking, "Xiao Fujun wants to use this thing to scare the Koreans?" ”

"Nope. The Yellow Turban Thief used this object to intimidate fools and fools. Ji thought that maybe this thing might also be able to take the lead in naval battles. Even if it doesn't make a big difference, at least it can make him really think that it was done by the Yellow Turban thief. Cai Ji said frankly.

Guan Cheng picked up a firework and played with it, while sly smiling, "Don't worry, my lord, this matter is on the last general." Then the brothers will be able to scare the natives half to death with this. ”

"Xiaofujun has a point. This thing can really make a fuss. Tai Shi Ci echoed.

Cai Ji saw that the two of them had an understanding of the application of fireworks in naval warfare, so he didn't say anything more. After all, fighting is not her specialty, and when it comes to specific tactics, she still rarely interjects subtlely. Therefore, Cai Ji then changed the topic and asked, I don't know when the sailor will fight? ”

As soon as Guan Cheng heard Cai Ji ask about the date of the battle, he hurriedly put aside the fireworks in his hand, hugged his fists and returned to the lord, and when the sea breeze was together, the warship would leave the port. ”

Cai Ji listened and gently tapped the tiger's mouth with a bamboo tube and said, "Yes." That's really everything, only the east wind is owed. ”

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