Because of dealing with the Li family, all the major families in Pinyang cooperated with Chen Ping's work very well.

Zhao Kun's move to "kill the chicken to warn the monkey" also achieved the expected results.

However, there is still a long way to go to win the world.

The most important path is the development of new weapons.

The so-called power emerges from the barrel of a gun. Since ancient times, there has been no action to seize power without force.

With the experience of making explosive packs and fuel bombs, the research on thermal weapons in military factories has officially started to get on track.

Because Han Xin was responsible for the military factory, Zhao Kun only brought Han Xin with him during this inspection of the military factory.

On the way to the military factory, the carriage was bumping very hard, and Zhao Kun felt that his bones were almost falling apart.

This shows that the location of the military factory is very secretive and difficult to be discovered without someone's guidance.

After all, I walk on rugged mountain roads.

After walking for about an hour, Zhao Kun's carriage stopped in front of a tower, and the surroundings were very strict.

However, when I saw Han Xin, I was very respectful.

After entering the military factory, Zhao Kun discovered that the so-called military factory is actually similar to a weapon workshop. Except for the architectural style of concrete and bricks, there are very few workers.

However, there is nothing we can do about this. Most of the craftsmen are concentrated in the central military construction of Qin. Most of the craftsmen here are trained by villagers, blacksmiths and carpenters in Qiankou Village.

Fortunately, although the sparrow is small, it has all the internal organs, and the division of labor in the entire military factory workshop is very clear.

Each weapon is forged in different areas, and the forging process is becoming more and more mature.

Molding, pouring, cooling, and grinding are also assembly line operations, without any chaotic and well organized.

Zhao Kun looked at everything in front of him without saying a word. This was his first visit to the military factory before leaving Pinyang and the last time he visited the military factory, so he looked very seriously.

After seeing the entire military factory, Gongshu Qiu came with a smile.

"Young Master is here, I am not welcome!"

"Sir, are you still used to it here?" Zhao Kun took a step forward and Xu Buzheng Gongshu Qiu, who was planning to salute.

"Thank you for taking it in by your son. You gave the villain the opportunity to study. Unfortunately, I don't have time to refine elixirs for your son. I am really ashamed."

Gongshu Qiu stood up straight and said with some shame.

Zhao Kun rolled his eyes in his heart, but said with a smile: "Sir, you must know that elixir is not a way to refine alchemy, and science is the way to achieve the best."

"Science Avenue?"

Gongshucho stroked his beard and murmured in his heart.

At this time, Han Xin suddenly interrupted and said, "Mr. Gongshu is refining kerosene. Do you have time to go and see it?"

"kerosene?"

Zhao Kun was stunned and immediately remembered something, and said to Gongshu Qiu: "Sir, have you mastered the method of refining kerosene?"

"Thanks to the advice of the young master, the little man discovered the new term "boiling point!"

Gongshu Qiu smiled and nodded, "The villain poured the hot oil into the pan and heated it. Different boiling points were used to extract different fuel oil."

"Oh?" Zhao Kun looked surprised and was overjoyed: "Sir, I am a god. I have mastered the method so quickly. Take me to see it."

When making fuel bombs, Zhao Kun used fierce tin oil, and fierce tin oil was crude oil.

Although there is no crude oil mine in Pinyang, Qin State has a department to mine crude oil, that is, Shaofu.

As the First Emperor's money bag, Shaofu was in charge of the tax on mountains, rivers and land. As long as the things in the mountains and the fields could make money, they would be involved.

And crude oil is one of them.

However, the Qin people used crude oil very simply, they were just used to burn it directly.

Zhao Kun was able to get crude oil thanks to Su Shaojian. If he hadn't been cursing about it, the crude oil would definitely not have been sold to Zhao Kun, after all, it was military supplies.

With processing crude oil, chemical things are basically solved half of them, and as for various additives, I will not consider them for the time being.

This is also impossible, but this was the condition in ancient times.

When Zhao Kun and the other two arrived at the backyard of the military factory, the fire had already started.

The rolling smoke made the people around them frown frequently. The process of refining crude oil always emits some unpleasant odors.

Workers close to the boiler can only wrap linen around their mouths and noses in circles to prevent toxic substances from being inhaled into the lung cavity.

Only then did Zhao Kun realize that coming to this world is not about developing industries just by wanting to develop industries.

For example, a gas mask, without rubber, can't do anything at all.

Even if there is a method for making rubber in the encyclopedia, the conditions for making rubber are simply not met.

Looking at the worker who was so fumigated that he was coughing and uncomfortable, Zhao Kun began to give in a little.

He was wondering if he was too anxious?

Industry is a huge system without corresponding development. Can it be possible to do this kind of rude work?

Just as Zhao Kun was frowning, the first jar of hot turmeric oil had been refined.

Immediately afterwards, the second and third altars were also refined one after another.

The workers around looked at Gongshu Qiu as if he was magical and extracted several things, and all showed a surprised expression.

Gongshu Qiu was too lazy to pay attention to them, and he stopped refining until only the sticky asphalt was left in the pot.

"Young master, look, the kerosene has been refined!" Han Xin reminded excitedly next to Zhao Kun.

“Refined?”

Zhao Kun came to his senses, put down his hand covering his mouth, walked over to check, and found that the oily white smoke was emitting from the jar.

"this……"

Zhao Kun hesitated for a moment, then tore off the corner of his clothes, stirred it in the jar, took it to his nose and smelled it, and smiled, "It's indeed kerosene!"

"Including these jars today, we have extracted more than twenty jars of kerosene!"

Gongshu Qiu walked over with his messy hair and black forehead with a smile.

Zhao Kun couldn't help laughing at his appearance, and was deeply impressed. He hesitated for a moment and said, "It's enough to have these twenty jars, so there's no need to refine them for the time being!"

"Ah? Why is this?"

Gongshu Qiu's smile suddenly calmed down and he looked at Zhao Kun with some confusion.

Han Xin also looked at Zhao Kun and said, "Young Master is worried about the source of crude oil?"

"no."

Zhao Kun shook his head and said, "What I am worried about is the harm of refining crude oil. You have seen it just now. Refining crude oil, thick smoke rolls and inhaling it frequently is harmful to the body!"

"Before there is no protective measures, the right way is to refine crude oil, temporarily shelve and study gunpowder."

"this……"

Gongshu Qiu and Han Xin looked at each other, looking at each other in a row.

Zhao Kun looked at them and grinned: "Since kerosene is out, it seems that the lighter can be made and played!"

"lighter?"

Han Xin and Gongshu Qiu looked at Zhao Kun curiously.

Zhao Kun threw away the cloth strip in his hand and asked: "Does there still be catkins we made last time for fuel bombs?"

"some."

Gongshucho nodded and said, "There are still a lot of people in the warehouse."

"Okay, then I'll make you a lighter."

Zhao Kun walked into the ironworks workshop eagerly.

Then direct the blacksmith to build the lighter body and cut the flint by the way.

When the catkins were delivered, he asked Han Xin to press the catkins into pieces to facilitate the absorption of kerosene.

Immediately afterwards, Gongshuqiu was taught to make an ignition device.

The most important thing about this ignition device is the grinding wheel, which can only be polished manually because the conditions are limited.

When all the accessories were made, Zhao Kun began to assemble in front of everyone.

As kerosene was immersed in willow catkins and began to merge with the wicks, Zhao Kun rolled the grinding wheels and suddenly a cluster of flames ignited.

Han Xin and others were surprised by seeing it.

"Young Master, is this what you are talking about?" Gongshu Qiu came first to check.

The rest of the people rushed to surround him.

Zhao Kun smiled and nodded, "Yes, this is the lighter."

"Hehe, this is much more convenient than flint!" A worker smiled in surprise at the flames of the lighter.
To be continued...