Ma Di was fifteen years old, still a half-old child, and his eyes turned red when he heard his uncle's question. "My uncle doesn't know if he lives or dies, how can my nephew study with peace of mind."

The Ma family has been able to develop to such a big point now, and they have opened shops in the capital, relying on this Ma Zhicai, who entered the ranks because of his skills.

He has admired this eldest uncle since he was a child, and he also has the idea of following in the footsteps of his eldest uncle.

In the Ming Dynasty, scholars, farmers, and industrialists could participate in the imperial examination, and only the families of prostitutes, elites, subordinates, and pawns could not participate in the imperial examination.

There is no restriction on the Ma family's study and entry into the book, but Suzhou was Zhang Shicheng's base camp, and the Ma family was also forced to have a rebellious experience.

Although the new dynasty was established and was not overly investigated, the Ma family was sentenced to three generations of not being allowed to take the imperial examination, and Ma Di's generation was only the third generation.

If you want to enter the company, you can still only take the road of relying on technology.

Maddy was smart and thoughtful since he was a child, and was more favored by the family than his somewhat dull eldest brother.

His maternal ancestor Songjiang Yu Xiaozhi was a famous general arithmetic in the pre-Yuan period. Because there was no male in the family, he moved directly from Songjiang to Suzhou for him, just to teach him to become a talent.

Ma Di studied "Yang Hui Algorithm" with Yu Xiaozhi since he was a child, "Arithmetic Enlightenment" compiled by Zhu Shijie, a mathematician in the Yuan Dynasty, and "Euclidean Geometry" from Yu Xiaozhi from the West, and showed a very high mathematical talent.

At the age of 11, he calculated that the intersection of triangles was 180° and independently proved it with a formula.

This made Yu Xiaozhi feel very relieved, and he was so happy and sad that he was dying.

Since then, Ma Zhicai returned to his hometown to pick up this nephew to come to the capital, and personally taught him abacus and family crafts, hoping that he could become a thousand miles of the Ma family.

Before the Spring Festival, he sent the descendants of the Ma family back to Suzhou for the New Year, and was summoned to the palace after the Spring Festival, and later brought a letter to let him study in his hometown with peace of mind, but he did not expect that he would come to the capital again now.

Listening to Ma Di's words, Ma Zhicai couldn't help but sigh and couldn't bear to blame him. "Since you're here, I'll study for two days with peace of mind, and I'll take the exam for you in two days."

Madi puffed up his chest proudly and said, "My nephew is not afraid of school exams. He suddenly remembered something, and without saying a word, he ran out.

"This child is not calm at all...... he was worried about his wife, who was not in good health, and taught the other children and nephews a few words, and then let them disperse.

At this time, Ma Di ran in again, holding a clairvoyant mirror in his hand and said, "Uncle, look, this is a clairvoyant mirror made by me, can I make the Ministry of Industry like it?" ”

The clairvoyant mirror is still an ordnance in the civilian population, and no one is allowed to hide it privately. However, Ma Zhicai not only works in the Ministry of Industry, the Ma family is also a supplier to the Ministry of Industry, supplying telescope lenses.

His second brother has now taken over the ancestral jade workshop, while Madi's father, Ma Zhide, has been learning crystal polishing since he was a child.

Later, he opened a glazed kiln to fire glaze and supply it to the Ministry of Industry. So telescopes are not available in other homes, and it is not uncommon in his home.

Ma Zhicai took the telescope handed over by his nephew, it looked no different from an ordinary telescope from the outside, and he didn't think so, but when he put it in front of him, he could see the difference in this telescope.

First of all, the magnification of this telescope is larger and it can look farther, and secondly, it also solves the problem of blurred vision of the telescope.

The earliest telescope of the Ming Dynasty was invented by His Royal Highness Taisun, it is said that he took the convex lens of tribute, and when he roasted ants in the sun, he accidentally stacked the two lenses together, and found that he could bring the distant scenery closer, so he asked the craftsmen of the Ministry of Industry to install the two convex lenses on a hollow straight cylinder and made the first telescope.

However, the vision seen by such a telescope is upside down and the mirror image is blurred.

Later, after various experiments, including adding a convex lens between the two lenses, adding a concave lens, and other methods, the problem of mirror image reversal was finally solved.

However, such a telescope depends on the transparency of the lens. Three-layer filtration and multi-layer filtration, so that most of the telescopes produced are unqualified, if you want to get a telescope, you need to polish the master carefully and try one by one.

The telescope had a clear vision, and it was zoomed in more than Ma Zhi knew. As a technical expert, Ma Zhicai suddenly forgot that his wife was still waiting for him, took the telescope to the outside of the house, and looked at the Qingliangshan Pagoda in the northwest.

After a long time, he put down his binoculars and asked, "Di'er, have you ever calculated multiples?" ”

Madi nodded and said, "My nephew has calculated that according to the proportion of light refraction, this clairvoyant can reach a multiple of forty times. ”

Ma Zhicai gasped, and his hands couldn't help but tremble. Nowadays, most of the telescopes used in the military are only six or seven times, and a few can reach eight to ten times.

In order to encourage them to build telescopes that can see farther, Taisun personally promised that if they built a telescope dozens of times larger, he would be rewarded. Not only is there a reward of money, but you can even be directly promoted to a knight.

He asked in a trembling voice, "How did you do it?" ”

Maddy didn't realize the impact of his invention, saying, "My nephew discovered that adding a lens between two lenses solved the reflection but also blurred the vision. Since television is refracted by light, the refraction of a triangular prism is better than that of a convex lens and a concave lens, so my nephew polished a triangular prism himself and installed it in it. ”

Ma Zhicai is also proficient in skills, and as soon as Ma Di said it, he understood. "Okay, good, good, Di'er is worthy of being a thousand miles from my Ma family, and you have made a great contribution this time."

If it weren't for the fact that there were two brocade guards at home, he would have been a little eager to pay tribute to this telescope. Thinking of the two brocade guards, he also calmed down, and now he doesn't know what the emperor will do with them, with this telescope in hand, he is sure that he can save his life.

Therefore, this telescope should not be handed over to the Ministry of Industry for the time being, and when the will is issued, it will be taken out, and it can save the lives of the whole family at a critical moment.

Compared with Ma Zhicai's gains and losses, and his uncertain mind, Ji Gang fell into ecstasy.

When he took refuge with his grandson last year, he was also very worried at that time, for fear that the emperor would cut off his head in anger.

If the emperor wants to kill him, except for Jinyiwei, almost no one will sympathize with him, whether it is a civil servant or a military general, I am afraid that they will set off firecrackers to celebrate.

However, as the commander of the Jinyi Guard, he was originally going to be a lonely minister, and if he dared to make peace with the Minister of Civil and Military Affairs, I am afraid that he would be finished ten years ago.

He knew very well that he had no way back, he could only rush forward desperately, and there was still a little hope for rushing forward, and he dared to stop and there was absolutely no place to die.

He didn't have any way back, and Taisun, became the only hope, and now hope has finally turned into light.

If you want the horse to run, how can the horse not eat grass.

Since you want to use Ji Gang and let him do things with his heart, then you must give him a hope.

Therefore, Zhu Zhanji took out the trick of fooling Zhu Di, leaked his plan to develop Japanese silver mines to him, and asked him to start preparing.

Today, Zhu Zhanji also formally promised him that if Japan's Iwami Silver Mountain is real, he will be sent to Japan to preside over the overall situation, and he will not be held accountable and liquidated by the court's ministers of civil and military affairs.

For a wicked person like him, let's put it in Japan and harm the Japanese.

got Zhu Zhanji's promise, and Ji Gang really put his mind at ease this time.

In the past nearly a year, Ji Gang can be said to have focused most of his energy on doing things for Zhu Zhanji in addition to his own work.

From sending envoys to Goryeo and Dongying to understand the local political environment and war forces, to investigating all the major commercial households in the Ming Dynasty, to understand the output of various materials, sales channels, and even processing processes.

As the grandson, Zhu Zhanji only needs to move his mouth, but the entire Jinyiwei system has been busy for more than half a year.

However, the results are also encouraging. Jin Yiwei came forward, and now none of the merchants in the Ming Dynasty dared to resist, as for the technical secrecy, there was no secret in front of Jin Yiwei.

Because of this, Zhu Zhanji's Xingqing Palace is now filled with a warehouse of information collected from all over the country.

The different firing techniques of a ceramic alone are packed in several large boxes, and the ceramic processes of different kilns in the north and south of the world have been collected.

However, there is one of the biggest problems, that is, there is no specific quantitative standard for this kind of process, which is also the entire oriental process in thousands of years of history, has not been solved.

There is no specific time for firing the kiln, it depends on the heat, and there is no specific quantitative standard for the temperature, which also depends on the heat.

Different soil formulas also depend on experience, and even coloring and glazing ceramics only rely on experience.

Therefore, even if you get these recipes, you need to keep studying them to make similar porcelain.

It is impossible to be exactly the same, even if different bowls made by a master cannot look the same, there are always some differences.

Zhu Zhanji knows very well that if he wants to solve these problems, he will not be able to solve them in a while, because the most basic standards have not been determined.

Today's weights and measures are actually more confusing, there is a ternary system, there is a decimal system, and between catties and two, it is a hexadecimal system.

This led to difficulties in calculations, not knowing a little math, and not even being able to calculate accounts in ancient times.

Zhu Zhanji didn't want to change all the weights and measures, and this is not something he can do now. However, for the sake of statistics, he nevertheless came up with a measure of length from millimeters to kilometers.

When he became the emperor, he took out all the statistical methods of weight, volume, and area.

The globe has been made, and Zhu Zhanji and Si Tianjian have divided the earth into 24 time zones, and now, of course, it is not London as the zero degree line, but the imperial palace in Nanjing as the zero degree line.

The setting of latitude and longitude lines is actually very easy to deduce, because the 24 hours of the day are fixed, and then the 24 solar terms, together with the constellations in the sky, can be tested in different locations, and a map can be accurately drawn in accordance with the scale.

Of course, Zhu Zhanji couldn't wait, he had already roughly divided the 24 lines on the globe, and he could divide the longitude first.

The dimensional line doesn't need to be too urgent, just let the people of Si Tianjian slowly deduce.