Seongnam Courtyard.

Until he stepped into the courtyard gate, Cao Bin didn't figure it out.

Lao Cao didn't see that he was acting.

Fortunately, Lao Cao didn't hold on, just told him a few words, and let him get out.

Cao Bin thought all the way, but he didn't understand it, so he didn't want to.

After entering the small courtyard, he first found Lao Ding, the person in charge of the bookstore in the front yard.

"Back to the owner, Xiao Lao'er has already calculated the date, and the opening date is set for three days later, which is the auspicious day. According to the owner's instructions, three days before the opening, all books and papers will be discounted by 20%, and a membership card system is also being opened. ”

Following behind Cao Bin, Old Man Ding said: "Little Lao'er asked two guys to help, both of them are innocent, please rest assured." ”

"Well, you can make up your own mind about these little things."

Cao Bin looked at the brand-new layout of the front yard, and nodded as there were books waiting to be sold on the shelves.

The books sold are not limited to Confucian classics, but also agriculture, law, engineering... and Cao Bin's "Three Character Classic", "Thousand Character Text", "Di Zi Gui" and other works.

At the door, the plaque of 'Sanwei Study' was also re-hung and covered with a festive red cloth, waiting to be unveiled when it opened.

"I won't be here when it opens, you can handle it yourself."

After inspecting the front yard, Cao Bin gave an order and walked to the middle courtyard.

"Please rest assured, the little old man can save it."

Old man Ding bowed his hand from afar.

The middle courtyard is a workshop where the paper department and the printing department are combined.

At this time, the printing department had no business, so it was suspended and went all out to make paper.

The workers in the workshop were in full swing, and the blank sheets of paper were made and then stored in the warehouse.

And the person in charge of the workshop, Lao Zhangtou, is striking iron with a sledgehammer.

Seeing Cao Bin walk in, he hurriedly put down the hammer and greeted him: "I've seen the owner." ”

"How's the plough going? When will it be completed? ”

Cao Bin glanced at the corner of the blacksmith's shop, where there was a model of a curved plough made of wood.

"Owner, please see, Xiao Lao'er is building a plow and shovel, and it will be completed soon."

Old man Zhang pointed to the wooden shelf placed on the side of the wall, and said with admiration: "This Quyuan plough designed by the owner is really ingenious, even if the little old man is not familiar with farming, he can see that it is more convenient than today's coupling plow, easy to turn around, eat deeper soil, and save more effort." ”

The curved plough is composed of twelve parts, namely the plow rating, the plow wall, the plow tip, the plow wheel, the handle, the forehead, the plow shovel, the plow arrow, the plow wall, the pressure shovel, the plow bottom and the plow rudder.

The plough blade and walls are made of pig iron, while the rest are made of wood.

Now that the wooden shelves have been installed, the plough and the plough wall are two pig iron parts, and the whole curved plough has been built.

"Well, can you call it a day tonight?"

Cao Bin carefully inspected it and found that the wooden shelves were very exquisitely made, and there was no fault with the connection between the various parts.

Without using a single nail, the mortise and tenon structure is used to hold it firmly together.

"Before sunset, it's done!"

Lao Zhangtou glanced at the sky, estimated the time again, and nodded in confirmation.

"Okay, I'll wait for your good news."

Cao Bin nodded and patted Lao Zhangtou's shoulder as a sign of encouragement.

After inspecting the workshop, he went to the storeroom and prepared to make a bomb.

If Lao Cao hadn't mentioned it today, he really wouldn't have thought of this thing.

"Yes, I remember, the ratio of potassium nitrate, sulfur, and charcoal is 15:2:3, let's get black powder first."

"Sulfur and charcoal are easy to get, the key is where to find potassium nitrate?"

In the warehouse, there are a lot of various objects, but they are all neatly placed.

Cao Bin walked around the warehouse and found a few yellowish sulfur ore crystals, accompanied by a foul smell.

Charcoal is easy to make, just burn some charcoal with wood, which is very convenient.

It's the key potassium nitrate, which is not available at all in this era!

"No, I want to think about it!"

After wrapping the sulfur ore crystals in the warehouse in paper and taking them out of the warehouse, Cao Bin returned to the backyard.

Now he is the only one living in the entire backyard, and Grandma Ding and the maids have moved to the Prime Minister's Mansion, which is convenient for him to develop black powder.

Sitting in a rocking chair in the backyard, he frowned and began to recall the memories of his past life.

"Hey, there's it, Nitrate!"

"Grass ash contains potassium carbonate, add plant ash to nitrate, the two have a chemical reaction, and after its crystallization, potassium nitrate can be obtained!"

"In this way, potassium nitrate, sulfur, and charcoal are all three..."

"Then what are you hesitating about, let's do it!"

After combing through the black powder formula, Cao Bin couldn't sit still for a moment.

First, he went to the front yard and told the men to find some nitrate, and then went to the house to get some plant ash and charcoal.

Then, after taking everything to the backyard, he tinkered with it alone.

....

Cao Bin was tinkering with black powder in the small courtyard.

didn't know that the entire Xu Capital City had been surging because of his arrival.

What happened today in the Prime Minister's Mansion was quickly reported.

Cao Cao's civil and military ministers were the first to get the news.

"Borrowing a knife to kill people, this hand is clever!"

After learning the news that Cao Pi was grounded and the Bian family was deposed, Xun Yu was amazed.

Cao Bin was clearly only eleven years old, but he played with Bian and Cao Pi in applause, and took advantage of Cao Cao's power to bring the two down in one fell swoop.

"Decisive killing, only I am the only one, but I have the appearance of a hero!"

Jia Xu also got the news and praised it.

Although Cao Cao has not revealed the idea of establishing an heir over the years, his ministers have a vague choice.

Some of the disciples of the family chose Cao Pi, while the rest were biased towards neutrality, or did not choose anyone.

Until the appearance of Cao Bin, as the widow of Cao Cao's eldest son Cao Ang, Cao Cao's eldest grandson, his identity was comparable to Cao Pi.

It stands to reason that both of them have the right to inherit and can inherit Cao Cao's throne in the future.

But with today's events, the Bian family was deposed, and Cao Pi has fallen into disadvantage.

If there are no accidents in the future, Cao Pi has lost the opportunity to succeed forever.

Jia Xu is a staunch supporter of the inheritance system of the elderly, and he took the lead in expressing his attitude and resolutely stood on Cao Bin's side.

Naturally, he was extremely pleased with what had happened today.

"The son of the eldest son is so brave? When he first came to Xu Du, he knocked down the Bian family and Zihuan Gongzi? ”

The generals also got the news one after another, and they talked about it one by one.

Cao Ang has followed Lao Cao Nan to fight in the north since he was a child, and many generals in the army have befriended him.

Although he has been dead for many years, most of the generals have expressed their optimism about his son's strong return.

In short, as the news of Bian's abolition and Cao Pi's grounding spread, Cao Bin officially entered the public eye.