The reason why Yuan Fang did this was because the formula of gunpowder was too important, and he didn't want to be easily obtained by other countries like airships and foggy stones, so the materials on the list handed over to Yan Xiong were not complete, and the main materials Yuan Fang bought them by himself, and then put them in a box and sealed them, except for Sang Rou and a few of them, even Tian Erniu didn't know what was in the box, so even if the spies of other countries had the ability to sneak into the military factory, they would not be able to get the complete formula of gunpowder, As for mass production in the future, Yuan Fang did not plan to prepare it in a military factory, and the reason why he chose to come here is because it has the best craftsmen and the materials needed.

Yan Xiong's work efficiency was quite good, when Yuan Fang and the others came, the foundation of the courtyard wall had already been built, hundreds of workers were building the courtyard wall, and hundreds of guards from the military factory were fully armed to guard the entrances and exits of the compound and the places where people could pass.

When Yuan Fang came over, Tian Erniu and the others had already arrived for a while, and Tian Erniu didn't know what Yuan Fang was going to do next, so the airship was still on standby.

This time, Tian Erniu added some guards to come in, a total of 300 people, under Yuan Fang's orders to protect the yard tightly, Yuan Fang did not forget the threat in the air, let Tian Erniu deploy the accompanying five combat boats to take turns to patrol and guard the entire military factory, and also informed Yan Xiong to strengthen the security work of the military factory in the recent period, and the air force units under the military factory to maintain combat readiness at all times.

Yan Xiong had been notified like this before, but Yang Xing's order did not say the reason, and now Yuan Fang was so cautious, Yan Xiong couldn't help but ask the reason, when he learned that the Wanliu Empire and the Liusang Empire also had airships, and the combat effectiveness was good, his face became ugly, air defense is a subject that the military factory has been studying, but until now it has not been able to come up with effective air defense weapons, for the people on the ground, their safety is all pinned on their own air force, which makes Yan Xiong unwilling but helpless.

Sending Yan Xiong away, Yuan Fang went to the factory on the edge to take a look, the lamps and lanterns here, the workbench and so on are all available, but the ground is not treated, it is still land, but these are not important, Yuan Fang is quite satisfied. In a corner of the factory, Yuan Fang turned around a few times, patted the thick wall and said: "This is it, Sang Rou, go outside and find a few strong people to come in, move those few workbenches here, Yuyue, you go and tell Erniu, from tomorrow, don't let anyone get close to here, well, within a hundred meters." Xia Yi, you and Qingru go to the innermost factory to have a look, if you can, arrange for everyone to live there, the conditions are limited, let everyone overcome it. Xiaoyun, you go and find the blacksmith that Uncle Yan arranged for us. And they were commanded to leave.

Hongyi looked at Yuan Fang with blank eyes, waiting for him to arrange things for him, but after Yuan Fang gave these orders, there was no movement, and Hongyi couldn't help but ask, "What about me?" What do I do? ”

Yuan Fang glanced back at Hongyi, surprisingly not sarcastic, thought for a while and said, "Wait a minute, there is a more important task for you." Hongyi nodded contentedly, stood beside Yuan Fang and looked at the factory curiously, to be exact, the corner chosen by Yuan Fang.

After a while, Sang Rou came in with more than a dozen biao-shaped big men, and moved the workbenches piled on the side one by one to Yuan Fang's instructions according to Yuan Fang's instructions, arranged them neatly according to Yuan Fang's instructions, and moved a lot of sandbags to put on them, arranged them in a circle, and even the space under the workbench did not fall, hundreds of bags of sand, but these strong men were not lightly tired.

Ye Qingru and Xia Yi have seen the innermost factory building, where there are all kinds of water and water facilities, so they set it as the temporary residence of Tian Erniu and the guards, although there is no separate room and bed, but Tian Erniu and they all brought their own tents, and living in the factory is also an unusual experience.

Guan Xiaoyun came back with two blacksmiths, one old and one young, who were not the best blacksmiths in the military factory, but they were indeed the most loyal blacksmiths. Yuan Fang didn't talk nonsense, took out the drawings drawn on the road and explained them carefully, and asked, "How is it?" Just a few things, how long will you be able to make them? ”

The older blacksmith stared at the drawings and muttered for a moment and replied: "This iron shell is a bit like an incendiary bomb is not difficult, as long as a mold is poured, and the tail can be welded, well, if you find someone to help, the mold can be made tonight, and the finished product will be produced at noon tomorrow at the latest." As for this, uh-huh, uh-huh. ”

Yuan Fang reminded: "Artillery." ”

The blacksmith suddenly said: "Yes, artillery, although this thing is also poured, but the volume is a bit too large, and it will take a little effort, and it is estimated that it will take five or six days to make one just by the two of us." ”

Yuan Fang waved his hand and said: "Just keep these things as secret as possible, you can find some trustworthy people to help, I don't have any other requirements, just open as much as possible." ”

The old blacksmith nodded, and then asked, "Lord Yuan, are there any requirements for materials?" ”

Yuan Fang thought for a while and said: "The shell of the bomb should be less tough, that is, the more brittle kind, cannon, in addition to being strong enough, the toughness should also be better, as for the specific materials used, you can look at it, and then record the ratio of the materials, so that it is convenient to adjust in the future, by the way, the materials should be kept secret, and don't tell anyone except me and Director Yan." The old blacksmith answered the order, took his son and Guan Xiaoyun and Hongyi, the two overseers, and left, and started to make molds overnight.

The outsiders were gone, and Yuzuki looked at the fortress made of sandbags in front of him, and wondered, "Brother-in-law, what are these for?" ”

Yuan Fang took Sang Rou and the others to the sand dune fortress and whispered, "Haven't you always been curious about the recipe I got from the pirate leader this time? Now I'll tell you, it's a very powerful thing, called gunpowder. Sang Rou and the others looked at each other, gunpowder, they had never heard of it.

Yuan Fang continued: "Gunpowder is a powder that is mixed with many materials, and when ignited, it burns violently. Sang Rou interjected and asked, "How about it compared to fire oil?" ”

Yuan Fang waved his hand and said, "Gunpowder and oil are not a use, you listen to me." Sang Rou stuck out her tongue, made a listening gesture, and stopped interjecting.

Yuan Fang continued: "The most important feature of this thing is that it burns fully instantly, this characteristic sounds like it is useless, but if it is packed into a closed container, it is different, the heat and blasting force generated by instant combustion can form an explosion, producing a small impact, this shock wave can push out some things with strong hardness and high melting point at unimaginable speed, these things are in a sense more destructive than bows and arrows." ”

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