"Not bad, really not bad!" Looking at the relatively detailed abacus in front of him, Li Jia was amazed.

The entire abacus is made of huanghuali wood. It is rectangular and surrounded by a wooden frame. Small wooden sticks are fixed inside. There are wooden beads on the small wooden sticks. There is a beam in the middle and the abacus is divided into two parts. The upper half of each wooden stick

There are two beads in the top half, each bead counts as five, and there are five in the lower half.

I also painted it once and left it to dry for a few days. You can still smell a faint smell, which obviously means a lot of care was taken.

Our country's abacus evolved from the ancient "calculation". "Abacus" is to use a bamboo stick as a bargaining chip to perform calculations, and then we have multiplication tables, addition tables, etc.

The abacus really took shape in the late Tang Dynasty and the Northern Song Dynasty. Li Jia's requirements were not high. He improved the current one a little and it became an abacus in the modern sense. The methods of addition, subtraction, multiplication and division have long been available.

For example, the formula for division: Zhu Shijie's "The Enlightenment of Arithmetic" (1299), "The Secret of Division"...

One return is like one advance, one advance becomes ten

Two and one add to make five and two add to ten.

Four goes into twenty-six, goes into thirty-eight, goes into forty...

Our daily mantra "Two to one makes five" comes from this.

"With this, why worry about the world being deceived?" Li Jia was very happy and patted the table. He looked at the young Jinshi. He didn't expect that just by talking, he figured out the cost and made it hundreds of years in advance.

Abacus was born.

The imperial examination method selects smart people, and smart people naturally have strong learning ability, and small calculations are naturally not a problem.

"Tell me what you want, as long as it's not too much, I will satisfy you!"

Seeing Huang Dezhang who was about to speak, Li Jia regarded him more and more as a treasure. Waterwheels, barrel wheels, and even water mills, etc., these things that had appeared long ago but had never appeared in Lingnan, would all be presented one by one.

These advanced things have long appeared in the Central Plains, but Lingnan is remote, and even in slash-and-burn farming, there are few iron tools.

"Thank you Commander, we are very happy in the Ordnance Department and we don't have any requirements!"

Although Huang Dezhang has a very straightforward temperament, he also knows that it would be reckless to ask for an official position with a friend at this time, but if he just wants his friend to leave an impression in front of the superior, it will naturally be considered a success.

"It's just that the Ordnance Department is too remote. We like reading very much, so every month we have less time to go to Brother Shi Xian's house to read!"

"What's the problem? There are a lot of books in a certain house. If you want to read them, just borrow them!" Li Jia thought he was a bookworm, so he smiled and said:

"Brother Shi Xian you are talking about, is this King Hu Bin?"

Li Jia still has some impressions of this person. There are not many secretaries in the Governor's Mansion. They are all reserve talents, so he understands.

This person can be regarded as one of the few famous figures in history in my memory, which is not bad at all.

"Exactly, Brother Hu loves books like crazy and never leaves his hand for a moment. It's not a lie to say he's a bookworm!" Huang Dezhang said with all his heart. Seeing the look of reminiscing on the governor's face, he felt very happy:

Brother Shixian, I have fulfilled my mission.

"I have also heard about him. The one who takes the most diligently from the library of the Governor's Mansion is King Hu Bin!"

Li Jia smiled.

"With a good name and good talent and learning, he is almost as different from King Luo Bin of the former Tang Dynasty!"

I hope that this King Bin will be as loyal to the Tang Dynasty as before!

After a few more words of encouragement, Li Jia was very precious to this great machinist Huang, and even matched him with a bodyguard for fear that he would be in danger.

"Here comes -" After Li Jia sat down, he stared at the abacus in front of him and thought about it seriously.

"Lang Jun——" An Guo's honest face appeared in front of him, and Li Jia smiled instantly:

"Go find some carpenters and make sixty copies of this thing. We don't need ordinary materials, just ordinary hardwood. Get it as soon as possible!"

"I understand!" An Guo smiled honestly, twisted his big butt, and prepared to leave.

"By the way, when we came to Panyu City, is the porridge donation in Yongzhou still going on?" Li Jia suddenly asked. Winning people's hearts cannot be interrupted, especially in the imperial capital, the heart of a country, and we cannot be careless.

"I think Panyu is also the first place where we, the big men, do good things, so there's no need to give out porridge!" An Guo looked back a little shyly, feeling a little uneasy.

"One day cannot be interrupted. There are many people in Panyu, but there are even more poor people. We entered Prince Xing's Mansion. Others are powerful but have few friends. Since we have few friends, we should take the initiative to make friends. Don't be afraid of wasting money. We, the Governor's Mansion,

Not short of money——"

"Young man, I understand——" An Guo became serious and bowed.

Then, holding the abacus, I looked at it carefully. I really couldn't figure out what this thing was for, so I shook my head. Lang Jun was always like this, he liked to make fancy things.

It is of great use in the doubts of others.

He often wondered which star his husband descended from, but only recently did he realize that it was the purple star in the sky...

Li Xiuxian came again after a few days, and once again came to this splendid and large-scale Governor's Mansion, he was filled with emotion in his heart.

Originally, he still had some inexplicable feelings about that thing in his heart, but he just hid it in his heart and never showed it. That thing is so supreme that ordinary people would twitch all over just thinking about it...

But, what the Taoist priest said is right! If God refuses to rebel, he will be blamed. The destiny of the Li family belongs to me. The world has been in chaos for decades, and people are obsessed with the Tang Dynasty. In addition, Li Dudu has a high and powerful position, so it will be easy to seize Lingnan.

The surrounding areas of Hou Chu and Fujian were more than capable of self-preservation but insufficient of expansion. The Tang State had just lost the land of Huainan to the Zhou Dynasty and was recuperating, with all the favorable geographical advantages.

The right time has come, the people have the right people, and the location has the right location. It is fitting that I, the Li family, will return to the throne.

As for the Li family in the south of the Yangtze River, they are just a bunch of people, so how can they be called the Li family?

"Patriarch, please come inside -" Patriarch Li came, and An Guo went out to greet him in person, very solemnly.

"Yes!" After taking a look, Patriarch Li was very satisfied with this attitude. He put his hands behind his back and walked into the yard with a smile.

One up, one up, five down, four, one down, nine, one up.

Two goes up two, two goes down and five goes to three, two goes to eight and goes into one.

Three up and three, three down and five goes to two, three goes to seven and goes to one.

Four up and four, four down and five go to one, four goes to six and goes into one.

…………

"What is this?" Patriarch Li entered the courtyard and saw a group of scholars sliding back and forth on a bead strung on a wooden stick and chanting incessantly. It was extremely funny.

Since when did this group of fools appear in the Dudu Mansion?

"These are the transport envoys carefully selected by the governor, and they are about to go to various places!" An Guo said nonchalantly.

"It turns out these are all transfer envoys!" Patriarch Li was startled, but fortunately he didn't say anything out loud just now.

He has also heard of the transfer envoys, but the envoys who are in charge of a state will rarely have to deal with them when paying taxes on their own fields.

What are those black beads? Patriarch Li was like a curious cat, feeling very itchy.
Chapter completed!