South of the city, Cao Bin's small courtyard.

"Boom..."

Two hours later, there was a roar in the backyard, as if nine days of thunder had descended.

Immediately after, a ball of fire rose into the sky, and it was amazing.

After the fire was extinguished, a thick puff of black smoke spread along with the smell of gunsmoke.

"Ah, what is the owner doing, why is there a thunderous sound and a burst of fire?"

"The proprietor won't set the house on fire, will he?"

Hearing the movement, all the workers were startled and discussed.

"Shhhhh

Lao Zhangtou, the person in charge of the workshop, also stopped striking iron, and looked at the backyard with worry.

What is the owner doing, he was shocked.

If something happens, what are they going to do?

Not to mention, if the prime minister is held accountable, they can't afford to be responsible!

Thinking of this, Lao Zhangtou threw down the hammer and went to the front yard to find Old Man Ding.

The two of them put it together and decided to go to the backyard to find out.

"Knock knock..."

The door of the backyard was knocked loudly, and Old Man Ding shouted loudly: "Boss, the little old man has something important to see." ”

"Squeak!"

The door was pushed open, and a gray head stuck out.

"You two... Is this something wrong? ”

Looking at the two old men outside the door, Cao Bin frowned and asked.

"Ahh

Old man Ding and Old man Zhang exclaimed in unison.

If they hadn't heard Cao Bin's voice, they would have been hard to recognize from their dusty heads, this was their owner.

"Owner, do you need little Lao'er's help?"

Through the crack in the door, Old Man Ding saw that the open space in the backyard was a mess, and hurriedly asked.

"Boss, how did you get this?"

Seeing that Cao Bin's face was covered with black ash, Old Man Zhang almost laughed out loud.

At this time, there was no such thing as an African refugee, otherwise, Old Man Zhang would definitely think that he had fled from Africa.

"Okay, okay, you can't help me with this, you guys, go about your own business."

Cao Bin is busy at this moment, how can he pay attention to them.

Obviously, I followed the steps I remembered in my previous life, why didn't I always succeed?

He tried many times, but either he could not extract the potassium nitrate properly, or there was an accident that caused an explosion.

In this case, Old Man Ding and Old Man Zhang can't help, but it's okay to add chaos.

"That's... If the owner needs it, you can let it know. ”

"It's the same with my old Zhang, if the owner wants me to help, I can do it at any time."

When Old Man Ding and Old Man Zhang heard this, they had to give up.

"Alright, let's go about your business."

Cao Bin waved his hand and closed the courtyard door again.

"Ma Dan, why didn't I study science in my previous life, if I continue like this, sooner or later I will be bald..."

Back in the courtyard, Cao Bin scratched his somewhat messy hair, distressed.

With this black powder, he felt like he had to lose at least a few hundred hairs.

"But if there is black powder, it will go from hard mode to easy mode in the future, and I must get it out."

Sitting on the chair, Cao Bin sorted out the gains and losses of making black powder several times before and recorded it.

I don't know how to properly prepare black powder, but with a rough proportional formula, I can succeed in making it sooner or later.

Summarize the gains and losses, and strive not to make the same mistake next time.

"Good, I'll try again."

After writing, Cao Bin threw away the pen and returned to the great cause of preparing black powder.

...

Intermediate Court.

"Knock knock..."

With a sound of tapping, Lao Zhangtou inlaid the two parts of the plough shovel and the plough wall into the wooden shelf.

This move also represents the official completion of the first Quyuan plough in history.

"Foreman, this is the song developed by the owner... What plough is coming? ”

"Stupid, this plow is called Quyuan Plow!"

"According to the owner, this plow is much more convenient than the coupling plow, and the efficiency will be several times or ten times faster."

"Hey, the great talent of the owner, with this plough in hand, wouldn't the people be able to cultivate the fields that were several times or ten times as usual?"

"Nonsense, how else to say that the owner is the grandson of the prime minister, and his status is noble, how can he be compared to me and other cheap craftsmen?"

A group of workers could not wait for a long time, and when it was completely completed, they immediately gathered around, with a new look in their eyes, and they began to talk nonsense.

With Lao Cao's unification of the north, the people of the world were divided into all walks of life.

Those who have skills will be craftsmen, and those who have medical skills will be Langzhong.... Those who don't have any technology can only be tun people.

If there is a literate person, there is a certain chance of becoming a small official, which can be said to be a person who gets ahead and ascends to the sky in one step.

Of course, at this time, unlike the Ming Dynasty of later generations, all walks of life were not completely restricted to death, and they could change industries at any time.

For example, the descendants of craftsmen are also allowed to farm if they want to farm.

Most of these workers were formerly farmers and were no strangers to farm work.

"Ha, I finally completed the owner's instructions before sunset and built this plow."

Old man Zhang put down the hammer, wiped the beads of sweat on his forehead, and stroked the Quyuan plow, as if caressing the skin of a young woman, and couldn't put it down.

The first quyuan plough in history was born in his hands, and he had a sense of honor and mission to participate in history and benefit all people.

"Okay, let's all disperse, the old man is going to report the good news to the owner."

After resting for a while and breathing a sigh of relief, Old Man Zhang drove away the onlookers, lifted the Quyuan plow and walked to the backyard.

"Foreman, you have built this curved plow, and the owner will definitely reward you, but you have to invite the brothers to drink."

At this time, a worker suddenly said.

"Yes, if the owner has a reward, you should ask your brothers to celebrate."

"The owner has always been generous, so we can have a big meal."

"That is, if the foreman completes the task assigned by the owner, he will definitely be rewarded heavily."

When the rest of the workers heard this, they immediately began to heckle.

", wait for the good news from the old man!"

When Old Man Zhang heard this, he waved his hand, and a smile appeared on his face.

"Foreman is refreshing!"

The crowd burst into laughter again.

"Knock knock..."

Carefully putting down the Quyuan plow, Old Man Zhang knocked on the door of the backyard.

After a while, the courtyard door was opened.

"What's wrong with you?"

Cao Bin stuck out his head and asked impatiently.

His temper became more impatient, and after repeated attempts failed, he had the idea of picking on his son.

But when he thought of the scene of attacking the city and plundering the land with bombs in the future, he endured it again.

Then he heard another knock at the door, interrupting his train of thought, and a nameless fire was born in his chest.

"The owner, the little old man has completed the construction of the Quyuan plough you confessed, please accept it."

Seeing that he had a calm face, Old Man Zhang took a step back silently and bowed down to report.

"Aha, you've built it?"

When Cao Bin heard this, his face immediately turned cloudy and clear.