When Zhu Di returned to Ningbo with more than 100 boats of stones, soil, and bird droppings, it was already May, and the crops in the fields were green and growing well.

When the fleet docked, the people nearby stopped to watch.

Someone soon notified the city, and all the officials in the city rushed out on horseback and in cars to welcome the return of King Yan's patrol!

Zhu Di instructed the crowd: "Bring down the guano on the ship and store it separately in various places in the warehouse, and don't mix it!" ”

He had already divided the stones on the island, and the stones alone were divided into several kinds according to color, softness, and place of production, in order to measure the amount of "fertility" that Chu Zhenren said, and the strudite that was transported back in the future would have a reference.

That's it.

Zhu Di rode into the city, followed by Zhang He, Chen An, and a group of guards.

He wanted to go back to his temporary residence in the city to rest for a day, take a bath, and wash away the fishy smell of the past two months at sea, but when he passed by a restaurant, he heard a young man in a Confucian shirt in the restaurant, drinking and discussing some strange words fiercely.

"Let the unknown number x...... Solve the equation. ”

"Alas, this new mathematical method is simple and simple, that is, many words are made up, and some Western characters are mixed in, which makes people scratch their heads when they learn!"

"Can the book compiled by Chu Zhenren be simple?"

"Don't complain, let's go back to the school after eating, I heard that the arithmetic questions of the township exam are all from Qin Tian's supervision, and there will be more difficult questions in the spring exam and palace exam next year!"

"What's the use of us learning math and geometry so hard, you say? Some yamen of the Ministry of Household and Ministry of Industry will use it, right? ”

"Chu Zhenren said it was useful."

Zhu Di pulled off the horse rope, stopped and ordered the guards to inquire about the situation from those scholars.

In a short time, the guard came out with a few young men—because he could not understand what these men were saying, he simply brought them out for His Highness to ask.

"I've seen His Royal Highness King Yan!"

Several Confucian scholars bowed one after another.

Zhu Di smiled: "No need to be polite, I just came back from the tour, and I heard what you were talking about, what new book did Chu Zhenren come out with?" ”

"His Royal Highness King Huiyan, it's like this, the imperial court published a book a month ago......"

Several Confucian scholars hurriedly replied, you and I will explain the matter clearly.

It turned out that soon after Zhu Di went to sea, the imperial court officially published a new arithmetic book, and sent students and some officials from Guozijian to various political envoys, so that students from all over the world could quickly get started and understand the content of this book.

The title of the book is the Holy Lord's Decree, and it is called "The General Theory of Mathematics and Geometry of the Emperor Ming".

There are punctuation marks in the middle.

It is also stipulated that the imperial examination will add arithmetic questions, this year and next year's spring, the following examinations will not consider arithmetic, only as additional questions, if you can solve the additional questions in the township examination, you can go to Yingtianfu Guozijian to enter the mathematics department to study mathematics and science.

Because the arithmetic method has changed too much this time, students all over the world refer to the new method with "mathematics", and the previous arithmetic law is called the old method.

Now that the county test has been opened, the counties have already had arithmetic problems, and soon they will start the government test and the college test, and there will still be math problems, and students can use the old and new methods to solve them.

The township examination is scheduled for September this year, and the general examination for entering Beijing to catch up with the examination is scheduled for next spring.

Time is pressing, and all students in Ningbo City gather together to exchange and learn from each other, so that they can quickly use the new method to solve math problems in the examination room.

Zhu Di flipped through the book "General Theory of Mathematics and Geometry of the Emperor Ming", and saw a variety of symbols in it, and the book also marked how to read:

Fork, crooked, thief (flat sound).

"When the book was first sent out not long ago,"

A young Confucian student said with a smile, "Because only ten copies were sent to Ningbo Mansion, everyone sent scholars to copy them, and those old talents of the old Yuan Dynasty also sent people to copy them. ”

Several Confucian scholars laughed.

Zhu Di saw that they could all accept learning mathematics, and he felt a little strange in his heart.

But if you think about it carefully, the imperial examination has been abolished for almost ten years, and scholars who want to become officials can only rely on Yin Feng to enter the national prison, and now his father has reopened the imperial examination, giving the world's corporal the opportunity to be a talent, a middle judge, and a jinshi, and these scholars naturally support it.

I am afraid that the opposition only comes from within the court.

Nowadays, being a Xiucai is not exempt from forced labor, but he can subsidize money and food, and he also has the privilege of not worshipping officials, and it is not surprising that scholars are eager for the imperial examination.

Zhu Di chatted with them for a while, and after hearing that His Royal Highness King Yan had killed several groups of Japanese robbers overseas, several Confucian scholars hurriedly saluted to show respect.

"This is the work of the Holy Lord and Chu Zhenren."

Zhu Di was modest, didn't stay any longer, and rode back to the house.

After washing away the fatigue, the guards sent a copy of "Huangming Mathematics", but Zhu Di did not have time to study it for the time being, and quickly summoned the generals of the guard under the Navy Governor's Mansion and ordered them to bring the code booklet.

Zhu Di, Zhang He, the commander, plus a few guards and thousands of households, in one room, unfolded the Chu Zhenren sea chart captured from Haikou.

"Compare and find out which comptoir leaked the charts." Zhu Di instructed them.

"Yes, Your Highness!"

Zhang He and several people went into battle in person, holding the code booklet, and looking for it on the chart line by line.

After a while, there was a result.

"Your Highness, I found it!"

Zhang He's face showed excitement, his finger pointed to the code booklet, and then pointed to the seized chart: "The water depth number, the direction of the ocean current line, the direction of the reef point, the five code codes are all matched!" ”

Zhu Di took it and looked at it, and after confirming that it was correct, he asked, "Which one is this firm?" ”

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A thousand households hurriedly looked through the books registered by the previous trading houses when they came to the territorial charts.

Also found very quickly.

"It's the Xu family!"

"The Xu family?"

"The Xu family is a big merchant on the coast, and they used to go to sea to do business, and they had a lot of dealings with the Japanese country."

"Zhang He."

Zhu Di ordered: "You take someone to seal the Xu family and put their person in charge in prison for interrogation!" ”

"By the order of His Highness!"

Zhang He turned around and strode out of the door, rode to the guard station to transfer troops, first surrounded the Xu family in Ningbo Mansion, ordered the soldiers to enter from the main gate, and arrested all the people inside.

Then he ordered the soldiers to seize all the shops of the Xu family, and the account books and documents were all confiscated, and the housekeepers, account rooms, shopkeepers, and men were all escorted to the guard house to take care of them.

Xu Wenheng, the younger brother of the head of the Xu family, was drinking tea with the officials of the city department, when suddenly a soldier from the guard station rushed in, asked for his identity, and immediately took him down.

"What are you doing?! I didn't break the law...... Sent by King Yan?! King Yan dared to order someone to arrest him without authorization, but he couldn't rebel! ”

"Collusion with the Japanese still dare to quibble!"

A hundred households gave Xu Wenheng of the Xu family a hard slap, and then explained to him: "His Royal Highness King Yan is the general leader of the patrol against the Japanese invaders, your Xu family colluded with the Japanese invaders, the evidence is conclusive, what else are you arguing about?" Take! ”

Before leaving, the hundred households of the guard gave a look to several officials of the city department, which frightened them into a cold sweat.

Collusion with the Japanese is a capital crime for the three tribes!

Xu Wenheng was quickly escorted to King Yan.

"Wronged, Your Highness, the Xu family has never colluded with the Japanese and the Japanese, we are wronged!"

"Absolutely not?"

Zhu Di asked him with a smile, holding the chart captured from the Japanese in his hand, hanging it down and showing it to him.

Xu Wenheng's face was pale, cold sweat covered his forehead, and after a while, he asked in a difficult voice: "Your Highness, you, you ...... on the chart you gave us."

"There's a code."

Zhu Di explained lightly: "The sea chart given by Chu Zhenren is extremely detailed, involving many islands, ocean currents, and water depths, and you can identify who leaked it out with just a few slight changes." ”

Xu Wenheng collapsed to the ground on the spot.

It is precisely because the chart is extremely exquisite, so when the Xu family copied it privately, they did not dare to change a single word or picture in it, copied a few copies as they were, and sold them to several overseas companies.

After King Yan seized the sea charts that flowed out, he only needed to follow the map to find out who they were fornicating with the sea bandits!

"Your Highness, spare your life!!"

Xu Wenheng trembled, he used to be pampered, but today he is a prisoner.

And it is very likely that the Xu family will be punished by the clan!

"Rao Ling? Who will spare the people who were plundered and killed by the pirates?! ”

Zhu Di shouted, his killing intent revealed.

"Your Highness!"

Xu Wenheng kowtowed violently, his head was full of blood, and shouted: "The Xu family is willing to atone for their sins, lead Haikou to be shortlisted, and only ask the Holy Lord and His Highness to spare a few lives of the Xu family!" ”

Those who collude with the Japanese and the three tribes.

Even if the Xu family makes great contributions, the head of the family will be beheaded and the family property will be confiscated.

"Humph!"

Zhu Di snorted coldly, ordered someone to come in, take Xu Wenheng away and detain him, and Qi Xiang's father and queen will make another decision.

The Xu family has found out, but the chart has been leaked, and this one can only be found, and it is difficult to say whether it can deter other businessmen who collude with the pirates.

Zhu Di still has an important thing to do.

Two days later, a fleet of ships went upstream along the canal and transported a lot of struvite to Yingtianfu, and Zhu Di's father ordered the household department to send people to spread these guano into the fields to see how much the crops could increase!

Zhu Di was not idle in Ningbo.

He ordered people to break up the struvite stones in the warehouse and scatter them all over the fields, recording what kind of bird droppings were scattered in each field and how much material was used.

In less than half a month, Zhu Di saw the preliminary results.

Most of the crops sprinkled with struvite were obviously in better condition than the others, and the seedlings were thriving.

Some of the fields were sprinkled with too much guano gravel, and the seedlings showed signs of wilting, so the farmers hurriedly watered and changed the soil to let the seedlings grow back.

Chu Zhenren is right again!

After Zhu Di personally looked at those fields, he said silently in his heart.

More than 100 acres of land were sown, but only a little bird droppings were used.

If you send boats to dig continuously every year, Daming's grain will be able to harvest three to fifty percent more, and it will be able to feed tens of millions of people!

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