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Zhang Fang glanced at Zheng and Tao Erwei outside the tent, nodded and said hello, and continued to focus on the work at hand.

The Han brothers brought two felt mats, Deng Zhan and Tao Sheng thanked them, knelt silently, and watched their young master busy with worried eyes.

Zhang Fang was indeed very busy at the moment, he was holding a copper pestle in one hand and a copper mortar in the other, constantly stirring a black and semi-viscous gelatinous mass. Qingyan, on the other hand, poured some black, yellow, and white powder into the mortar from time to time under his instructions. Zhang Fang stirred so attentively and so attentively, his eyes sparkled, as if that disgusting mass was some kind of strange thing.

When the stirring was almost done, Zhang Fang and Qingyan put on a homemade cloth mask at the same time, put a white cloth on the edge of the copper mortar, and then moved the copper mortar to an iron ring rack, in the middle of the shelf was a brazier, the basin was filled with dry cow dung, and the cow dung that had been lit was emitting a dark red fire. Don't look at cow dung, it's disgusting, but the burning effect is really good after drying.

As the temperature of the copper mortar rose, the smell in the tent slowly became unpleasant, and the Han brothers who were guarding both sides of the tent door covered their noses and walked away a few steps, looking at Gongzi and Qingyan in the tent worriedly.

At this moment, Zhang Fang is just squinting, holding the copper pestle in his right hand, stirring steadily and evenly, and at the same time, the hand holding the copper mortar is also constantly making concentric circle movements, so that the objects in the copper mortar are fully heated. The black paste in the copper mortar is slowly dried under heat baking to form a powder......

When the black mass was half dry, Zhang Fang moved away from the fire source and let the copper mortar dissipate heat. It is then poured onto a grey cloth, wrapped in a silk rope and carefully placed in a small box. And in the small box, there are already five or six such gray cloth bags.

On the other side, Qingyan was not idle, she was gluing coarse straw paper with rice milk, wrapping it layer by layer to form a round tube. The shape is becoming more and more familiar...... When her tiny fingers inserted a thin twist of medicine into the tube, anyone from the Hereafter would have blurted out—

Artillery battle! Artillery battles!

That's right! Zhang Fang creates artillery battles, lethal artillery battles!

Zhang Fang is not stunned, and he will not be desperate because of hatred, how can he let his subordinates only use small knives to fight the Huns? They are here to kill, not to kill themselves.

When Deng Zhan and Tao Sheng were buying camels, grain, forage, clothing, and tents in Jilusai, Zhang Fang took the Han brothers and others to sweep all the local pharmacies and shops. In the end, large bags and small packages of medicine scales, pestle mills, straw paper, saltpeter, sulfur and various emergency injuries and dressings, and then purchased hundreds of catties of fine charcoal, and then met with his guards.

Before leaving the stopper, Zhang Fang did something that made Zheng and Tao speechless: ask more than a dozen helpers to grind all the fine charcoal into powder; That's not all, the pieces of saltpeter and sulfur are also ground into powder and repeatedly sifted; Later, the young master even put these things in a pot and tinkered alone in the room, saying that it was "purifying"; In the end, all the medicinal powder was packed into several large bags, which were hundreds of catties, and all of them were put on camels and transported away.

From the first day of the fortress, Zhang Fang began to prepare gunpowder and make cannons - strictly speaking, this was not a firecracker in the usual sense, but a powerful explosive cannon, or rather, the Thunder King.

Judging from Zhang Fang's profession, it is hard to imagine that he can actually prepare gunpowder and make artillery, but when it comes to his hometown, to be precise, his mother's hometown, it must make people smile, the largest production base of fireworks and firecrackers in the country - Liuyang.

From primary school to junior high school, Zhang Fang would go back to his hometown with his mother every summer vacation to help in the family workshops of several uncles and work and study. In the family-style cigarette factory, all kinds of hand work, what kind of cutting tube (cutting paper shell), pulling tube (rolling paper tube), upper tube (loading black medicine), inserting and twisting...... Except for dispensing, all the processes have been done.

In fact, after junior high school, Zhang Fang even mastered the dispensing, and made countless super cannon battles by himself, just to fry fish.

There is a big river in front of the village, which is a branch of the Liuyang River, and every summer, it is the season of abundant grass and carp. The villagers never use nets or fish hooks, but simply throw bombardments.

If you want to fry fish, ordinary firecrackers are certainly not powerful, and they are all special explosive cannons. This kind of artillery called "Thunder King" is as thick as an egg, about half a palm long, with a large amount of medicine, and a variety of synergistic chemicals are added, and a hair pulling device is used. That's powerful, it's leveraged.

Throwing one into the water is like blowing up a muffled thunder, and the splash is as high as one person, and dozens of dead fish float in the river at once. If you tie up the four Thunder Kings and throw them to the bottom of the water, that guy ...... Standing by the river, there is really a feeling that the earth is shaking the mountains, and the power is no less than that of the detonator that blows up the mountain rocks.

Zhang Fang and the friends in the village saw that their eyes were hot, so everyone worked together, with their gunpowder knowledge and cannon-making skills, it was not difficult to make a thunder king, but the hair pulling device stumped people. This thing has a unique recipe that the average person can't even know. So the eldest cousin personally went out and stole his own formula...... In the end, Thunder King succeeded in making it, and the fish exploded in a large basket. The grove in the back mountain is full of archaeological fish bones, and the friends have a round belly.

On that day, all the villagers in the small mountain village saw this scene, and the eldest cousin was chased by the uncle with oil-soaked rattan for half the village......

After going to high school, Zhang Fang rarely went back to his hometown, and when he went to college and worked, he was thousands of kilometers away from his hometown, and it was rare to go back once in a few years. Even if you go back, as you grow up, it will be impossible to play artillery battles......

Zhang Fang never thought that this craft would also shine one day.

From the beginning of the manufacture of the first thunder cannon, Zhang Fang went to the target of hurting people and even killing people. To this end, he added a lot of chemicals to the black medicine, which were absolutely forbidden in firecrackers and refined from various minerals that he could collect in this era, as well as some metal powders. The gunpowder he prepared is different from ordinary black powder, it is more powerful, and has the advantages of fast combustion rate, low humidity, easy ignition, and high explosiveness. It's a pity that some key chemicals can't be refined, and the power of the thunder cannon is inevitably discounted, and it can't be compared with the real Thunder King. And due to the lack of a unique dispensing, it was not possible to make a hair pulling device, so it had to be ignited manually.

Along the way, Zhang Fang did it himself throughout the whole process, plus Qingyan's assistance, helping to pull the tube, put the tube, and insert the twist. In the past 20 days, more than 120 thunder cannons have been made. However, Zhang Fang has never tried to explode a tube, he doesn't need to try it, he is completely sure of the medicine and cannon made in his hand.

Put the last tube of the thunder cannon into a black box, Zhang Fang took off his mask, sniffed the faint smell of liquid dioxide (the toxic gas produced when dispensing gunpowder) in the air, shook his head, beckoned Qingyan to come out of the tent, and took a big breath of fresh air. After a long while, he beckoned Zheng and Tao Erwei to enter the account together.

After Zhang let go of his hands, he looked at Zheng and Tao Er's guards: "Look at your faces, is there any good news?" ”

Deng Zhan and Tao Sheng glanced at each other, Deng Zhan nodded and saluted, "Exactly." The guards who sent out the sentry came with the news that there were obvious traces of people and horses five miles away, and most importantly, the horse manure was still fresh......"

"Oh!" Zhang Fang and Qingyan are both happy colors, "In this way, the goal is not far away......"

Deng Zhan frowned: "However, the brothers sent to Wuwei to purchase weapons have not yet returned, and the closer we chase, the more dangerous it will be." ”

Tao Sheng suggested: "I have discussed with Brother Zheng, it is best to divide the team into two, Brother Zheng will lead one to explore the road in front, and I will lead one to protect the young master of the rear team." In this way, everything can be done. ”

Zhang Fang thought about it and shook his head to veto: "Separated like this, is there too few people?" Our numbers were already smaller than those of the Huns, and if we were scattered, wouldn't it be easier to be broken by each of them? It's not appropriate, it's not appropriate. ”

Deng Zhan said anxiously: "But we don't have enough weapons, even if we chase after us, we don't hurt the tiger but are injured by the tiger!" ”

Zhang Fang smiled: "Weapons, I ......"

At this moment, the excited voice of the guard came from outside the tent: "Report to the young master, Zheng Tou, Tao Tou, we found a birch forest outside the canyon, which can make bows." ”

Deng Zhan and Tao Sheng were overjoyed and stood up together: "Great! Birch bows, although inferior to horn bows, are better than ruler knives, less master ......"

Zhang Fang made a calm gesture and smiled: "We don't need to make our own bow." ”

"But ......"

Zhang Fang stretched out his hand and took a tube of thunder cannon from the black box, and raised his eyebrows: "We have it!" ”

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(PS: Regarding the straw paper used in the gunpowder cartridge, the Western Han Dynasty already has a coarser paper, that is, "Baqiao paper", the material is made of hemp, which is easy to break, faint ink, and not suitable for writing, but it is still quite suitable for pasting the cartridge.) It is estimated that rubbing is also better than wood chips, but for some reason no one uses it...... But don't worry, the protagonist is sure to use ^-^)