Xianyang City, Lijiazhuang

The Dharma Academy has become the most heavily guarded place in the entire Lijiazhuang, and every day new inventions come from here to the Ba family, and then the Ba family's chamber of commerce will popularize these things throughout Daqin.

In the past year, the Dharma Academy has invented many things that benefit people's livelihood, such as waterwheels, new climbing plows, craftsman tools, and so on.

"Da Niu, did you find the person I asked you to find?" In front of the Dharma Academy, Li Chen asked the big cow next to him.

"The best craftsman in our Zhuangzi, I found it." Da Niu replied very confidently.

"What about people?" Li Chen asked.

"Yes." Da Niu replied.

"You're really not modest." Li Chen was stunned for a while, grinding his teeth and said.

"Genius is always envied by metrics." Da Niu said meaningfully.

"Let you be proud first, you will feel good if things are not done well." Li Chen threatened. However, he was very surprised that today's Lijiazhuang is no longer what it used to be. After recruiting so many talents, Da Niu is still the best in Li Jiazhuang.

"Boss, I regret it, I'm not the best craftsman in Lijiazhuang, okay."

"Gross, gagged."

Lijiazhuang, the eighteenth public thatched house. Under Li Chen's supervision, Da Niu was holding bamboo chips to scrape the alkali mud on the stone wall of the thatched pit.

"Don't blame me for cheating you, I asked you to find someone to do this, you have to post it yourself. What can I do, I'm helpless. Li Chen covered his nose and said from afar.

"You craftsman." The big cow shouted bitterly.

"Don't talk about it, there are still five thatched huts to be scraped." Li Chen comforted.

"Five ......" big cows want to cry without tears.

In order to hold the largest court meeting in the history of Great Qin, Li Chen decided to put the salute and salute on the stage of history.

The most indispensable thing for the salute is black powder, the three main materials in black powder, sulfur, charcoal, and nitrate.

Sulfur is mainly concentrated in some volcanic areas, and this thing will bring a large number of Fusang every year, and some places in Daqin can also produce some by themselves. Not to mention the alchemy priests in the hundreds of schools, even the people also left some to expel snakes and insects.

Not to mention charcoal, Lijiazhuang has its own charcoal kiln factory, and it can be burned as much as you want.

There is no shortage of sulfur charcoal, but this nitrate is relatively rare. There is no nitrate ore around Xianyang, and Li Chen has not found it on the market. However, this matter did not bother him, and there happened to be a volume of the method of making nitrate from soil in a popular science book he found in the earth's space.

It is very simple to make nitrate in the soil, first go to the manure pit covered with mud bricks, scrape off the alkaline mud with the highest concentration, dissolve it in water, put it in a pot and boil, and then pour it into a wooden basin to allow it to solidify.

Lijiazhuang, an abandoned courtyard

"Boss, I'm done shaving, can you let me take a shower." The big cow carried a basket full of alkali mud and said with an aggrieved face.

Along the way, no matter who sees the big cow, they will be far away from him. The smell of these dozens of pits is mixed together, and it can only be said that it is enough to taste.

"Don't wash, trust me, this is just the beginning." Li Chen said solemnly.

"Da Niu, this task related to the fate of Daqin will be handed over to you." Li Chen gave the method of making nitrate to Da Niu, and then after throwing a broken pot to him, he walked out of the door.

"Boss, you must help me watch the door, otherwise I will really have no face to see people." The big cow looked sad, holding the pot in his left hand and the basket in his right hand.

"Bang."

"Thunderbolt Bang."

As Li Chen closed the dilapidated wooden door, Da Niu also began to get busy in the courtyard.

Soon, a stinking smell wafted out of the yard.

"Brother, what is Brother Niu doing inside." Liuzi rushed over with Wang Li and others following the smell, and Liuzi asked.

"You may not believe it when you say it, your big brother is cooking." Li Chen whispered.

"Mofei, this is the recipe of the big cow. What is eaten is, and what is squeezed out is strength. Wang Li's voice was very loud, as if he had discovered some earth-shattering secret.

"Wang Li, don't leave after school." The vicious voice of the bull came from the courtyard.

Li Chen mourned for Wang Li for three minutes in his heart, this guy was really going farther and farther on the road to death.

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Mix nitrate, sulfur, and charcoal together in a ratio of 1:2:3. Hammer it with a wooden hammer for an hour to allow it to completely turn into powder and fuse together. Then pour a small amount of water and stir it well. Mix into granules and let them dry in the sun.

Compared to powdered black powder, granular black powder will be more powerful. The reason why granular gunpowder can exert more power is that it cannot be completely crushed into a single piece. There is a certain space between these particles, and the oxygen in them plays a good role in supporting the combustion of gunpowder, so that the efficiency of gunpowder combustion is greatly improved.

Fortunately, Li Chen used most of the opportunities to go to the earth's space to move books, and sure enough, knowledge can change fate. Otherwise, with his half-baked knowledge, let alone a salute, even two kicks can't be made.

"Forget it, let's make fireworks and firecrackers, and get the cannon out in one step." Since the black powder was pounded out, Li Chen was really a little inflated.

"Da Niu, you are the best craftsman in our Lijiazhuang, if you don't make this thing, who will make it." Li Chen of the Damo Academy discussed with the big bull.

"I don't."

"I'm not."

"You're looking for the wrong person." Da Niu, who was scared by Li Chenkeng, hurriedly denied the three consecutive days.

"Da Niu, you have to believe me, if I am cheating you, I will let Wang Li be bombarded by the five thunderbolts." Li Chen raised his hand and swore.

"What, what's wrong with me." Wang Li, who was watching the excitement from the sidelines, was a little confused.

miscellaneous, and a random punishment for a lucky spectator.

"Okay then, I promise you." The bull said briskly.

Now the most annoying thing in the whole Li Jiazhuang is not Li Chen, who talks about cross talk, but Wang Li, who praises him. It's really too much to owe, Da Niu thinks it's best not to be pitted, if he is really pitted, he will exchange one with Wang Li Limit.

After all, the old Qin people are still very swearing.

"Da Niu, do you think this thing can be made?" Li Chen took out a drawing and asked.

This drawing was found by Li in a museum in Earth Space, a tiger squat cannon from the Ming Dynasty. This cannon is powerful, flexible and convenient, and it is simply a mortar.

This cannon is composed of a body barrel, an medicine chamber, and a gun tail. The head and tail are 2 feet long, 7 iron hoops are added around the body, the gun head is erected by two iron claws, and there are iron trips, with a total weight of 36 catties. It looks like a tiger is powerful and majestic. Before firing, the gun body must be fixed to the ground with large iron nails.

"Boss, what the hell is this?" Da Niu took the drawings and looked at them over and over, but he really couldn't figure out what the iron pipe was for.

Li Chen leaned in his ear and muttered a few words.

"Boss, this thing was made. Not to mention Lijiazhuang, the entire thatched house in Xianyang has been scraped. I don't know what Li Chen said, Da Niu's eyes lit up.