When he came to Jiating again, Liu Jin was very surprised.

Because he discovered that this place had undergone earth-shaking changes from the last time he came.

Originally, the sound of reading aloud that every household kept hearing has disappeared.

All I could hear in my ears were bursts of strange crackling sounds.

Countless scholars in Confucian uniforms whispered to each other under the shade of trees, in the yard, and even by the road.

The content they discussed was not "Poetry" and "Book".

But some inexplicable words.

What are three to five to two, four to six to one.

Liu Jin was confused.

What's even more exaggerated is that a large number of scholars gathered at the doorsteps of several farmers in the pavilion.

These people gathered together, looking excited and nervous.

In the yard, several civilians dressed in farmers, holding saws, files and wood, seemed to be fiddling with something.

In a moment, someone made something, and a scholar took it over and immediately carried it home happily, and at the same time threw down a large handful of Wuzhu coins.

"Is Zhang Zizhong's innovation something?" Liu Jin was puzzled, so he asked the coachman to drive forward, stopped the scholar, and asked, "What are you holding in your hand?"

"Abacus!" the other party was obviously extremely happy and replied casually.

Liu Jin also saw the thing he was holding.

It is square, with wooden beams and wooden plants, and looks ordinary.

But the other party obviously didn't want to answer any more. He hugged the object, as if he was holding a beloved girl, and walked happily to somewhere.

While walking, he was muttering some strange words in his mouth: "One on one, one on five on four, one on nine on one..."

This made Liu Jin extremely curious and felt like a cat's claw in his heart, so he got out of the car and came to the gate of one of the farmers' yards where scholars gathered.

Several entourages riding horses followed behind the car immediately followed.

Although these people were all in casual clothes, they only tied a sword around their waists.

In fact, their clothes were covered with armor.

There were also arrows in the belt.

Once something happens, you can draw out the arrows and call out the guards outside the pavilion, pretending to be conducting routine marches and training.

If necessary, the Changshui cavalry stationed in Changshui Township can even be summoned directly to assist.

These are all the security experience accumulated by Liu over the past few decades - there is no way, the members of the Liu family have always loved to travel.

From Emperor Gao to the present, all emperors of all dynasties have played in the folk.

This security work naturally requires caution.

Liu Jin didn't know these things at all, so he excitedly squeezed into the crowd.

But in the yard, a young farmer in his twenties, with bare arms and a saw, sawing pieces of wood into wood of different lengths.

There were also two young men holding files and squatting the small wood bit by bit until they were rolled into round beads about the size of a date. They were sweating and continued to make the next one.

"Brother, what are you doing?" Liu Jin bowed to a scholar beside him and asked softly.

"I'm doing a 'abbreviation'!" The man replied, then looked at Liu Jin and asked suspiciously: "Don't you know what happened to this Jiating Pavilion?"

In the past two days, the Jiating incident has spread throughout Nanling County and has begun to spread to the surrounding Baling, Lantian, Fengxian and Huxian.

Maybe, even Chang'an City may hear the wind.

So, Jiating was like a magnet, constantly attracting scholars from all directions.

Yesterday, there were more than 300 scholars in Jiating.

So the houses in Jiating are a bit crowded.

"It's true that my brother gave me advice. What is this abacus? What's the use?" Liu Jin quickly asked for advice.

"This abacus was done by Zhang Jun of Jiating..." The man said proudly: "This thing is magical and can be counted as a whole world's mathematics! Zhang Jun's orders have solved the pi!"

"Pi!?" Liu Jin took a deep breath.

Even though he used to read the meaning of the scriptures, he had also heard of Pi.

This is a problem for all mathematics artists since the pre-Qin period!

Back then, when the censor Erkuan was alive, he often sighed that he could not solve the mystery of pi.

This Zhang Zizhong actually untie it?

Liu Jin felt a little dizzy in his mind.

This is incredible!

"However!" The other party was extremely proud, as if he was proud: "Zhang Jun is talented and unparalleled in the world. He not only explained the pi, but also made his explanation public. What made me even more admired was that Zhang Jun did not use his own treasures like others and conceal his secret technique, but instead gave this abacus tool and abacus decision to us!"

"I am a little late. If I come two days earlier, I will definitely hear the moment when Zhang Jun teaches the abacus formula..." The man sighed with a sound of tsk in his mouth: "At that time, Xu Hui bowed his head and Wu Yuan worshiped, and all the students worshiped him with great worship! Just like when Zhong Ni taught "Spring and Autumn" and Zixia..."

For the poor, the scene at that time was indeed a moment when they felt extremely proud.

One by one, one by one, one by one, one by one, was a proud family who once showed off his power and regarded the poor as nothing.

In front of Zhang Jun, he could only bow down and submit to him and pay homage.

This undoubtedly proves to them a fact: poor scholars can also counterattack the noble families of the marquis!

As long as you work hard, even if you join Zhang Zizhong, you will bend your children in the aristocratic family and let the descendants worship him.

At least they can also face themselves!

Liu Jin was also a little fascinated when he listened.

Who is Wu Yuan? He doesn't know.

But he also heard of Xu Hui's name, and he is said to be a talented young mathematics artist.

"Abacus decision?" Liu Jin asked in confusion: "But it's like a formula?"

"Yes!" the man replied, "It's just easier to remember and use more than the calculation formula..."

"If you are interested, you can go to the wall outside Zhang Jun's house and see the decision!"

"Although it's just a formula for addition and subtraction for the time being, it's catchy and easy to understand..."

"Zhang Jun will talk about the way of multiplication and division tomorrow, and the decision of multiplication and division..." The man said with a longing look on his face: "At that time, I really don't know what kind of grand occasion it should be!"

Because of the matter of abacus and the fact that Yuan Chang, Xu Hui and others bowed their heads.

Especially Yuan Chang and Xu Hui bowed their heads, Zhang Zizhong's name in Jiating has been known to everyone in the Ba Shangyuan.

At that time, maybe the three elders in Lianxian County will come here.

As time goes by, there is no doubt that in the next few months, the name of Zhang Zizhong of Jiating will continue to spread, and may even spread to Luoyang, Linzi, Suiyang and even Jicheng.

After hearing this, Liu Jin looked surprised.

He murmured to himself: "No wonder my grandfather attaches great importance to and appreciates this Zizhong so much... He is indeed a genius!"

Addition, subtraction, multiplication and division are the foundation of numerical techniques.
Chapter completed!