On the second day of the Jiuzhangtang, more than 20 inmates spent a painful morning under the bombardment of Lu Sanlang's exercises, and in the afternoon, after Zhang Shou used the three words Tianyuan to arouse the great interest of the inmates, he threw out the big killer of the unary equation, and then irresponsibly handed over the task of explaining to Lu Sanlang, and he left quietly.

If he is not a teacher, he doesn't know how hard it is, not to mention that he now has to take up to eight classes a day, so how can he stand it, naturally he has to rely more on Lu Saburo or the self-study of the inmates.

Moreover, when he was asked to explain the simplest unary equation to a group of inmates who didn't know what the equation was, he felt that his patience was completely insufficient, and he was also very indignant at the loss of those simple mathematics textbooks of Taizu back then.

When he got to the bottom of the archway of Guozijian's university, he saw that the carriage sent by Zhang Kang was already waiting there, and of course, Ah Liu, who would always appear when you needed it. He had gradually become accustomed to such bumps, and after being tired for most of the day, he got into the carriage and dozed off unconsciously, until finally there was a knocking sound on the wall, and he suddenly woke up.

"Young master, the Armory Bureau has arrived."

Zhang Shou patted his cheeks, and finally recovered his good spirits, and then got out of the car, and then found himself standing in a quiet alley. Not to mention the harsh sound of tools tapping, even the sound of people speaking can barely be heard, and the three words of the Ordnance Bureau seem to be very incommensurate. And a green-shirted official who came forward took the initiative to solve his doubts.

"The Yamen of the Ordnance Bureau is here, but the workshop is underground, and all the land around here is assigned to the Ordnance Bureau, and many of them are empty houses, so there is no sound. Dr. Zhang came for the first time, I am afraid that I don't know the rules here, and I can't go to the ordnance bureau, even the prince or even the prince can't enter the armory, so my uncle asked me to take you to his other private residence here. ”

Seeing that the other party's explanation was very detailed, Zhang Shou immediately thanked him with a smile - the secret unit, it is normal for the rules to be big. And the map may be a very precious thing for those merchants and even the fleet, but for the Ordnance Bureau, it should be no more valuable than those important weapons and equipment, especially if he wants to see the map of the world outside the territory of the Ming Dynasty, it is not surprising that he can bring it out.

Because there was no one else on the road, Zhang Shou had to talk to the Tsing Yi official who led the way, and only then did he learn that the other party was Li Wei, the eight-rank dictionary in the Ordnance Bureau. Although he is one grade worse than his Dr. Guozi, he is not so stupid as to think that there is really only a little difference between the seventh and eighth grades, so the other party behaves respectfully and distantly, and he stops after asking a few questions.

When he stepped into an ordinary-looking courtyard, the Li Dianshu in front of him suddenly asked, "Dr. Zhang is here, but to unravel the fourteen-ring exquisite box?" ”

Zhang Shou didn't even think about it, so he pretended to be stupid and said, "What fourteen-ring exquisite box?" ”

Li Dianshu saw Zhang Shou's confused face, naturally he didn't expect that a young talent with such a reputation as him would pretend to be confused, and immediately said in a deep voice: "It is a secret box that has been kept for many years in the Ordnance Bureau, and there is a fourteen-ring text lock on the outside, which will cause self-destruction if you are not careful, so it has not been opened for decades." Dr. Zhang, your ability to decrypt is famous, and I naturally think it's for this. ”

Since he decided to pretend to be stupid, Zhang Shou naturally decided to pretend to the end: "Hehe, I'm just because Lu Sanlang and Wei Nanbo have some petty friendships, and they met last night, and they were curious for a while, so I hope that Wei Nanbo can be accommodating and let me see the map of all the countries in the world." ”

Li Dianshu suddenly laughed, and his face was clearly a little disapproving: "What are all the countries in the world, those places outside the world, at most, there are dozens or hundreds of small countries. Wait until you see those maps, Dr. Zhang. ”

For such a reaction, Zhang Shou couldn't help but become more and more puzzled. However, he soon learned the answer. Because, when he stepped into a room in the middle and saw Zhang Kang, the uncle of Weinan, who was quite old, but he could still see that he was heroic and resolute, not at all like a barbarian, and after waving his hand and retiring Li Dianshu, he immediately pointed to the east house.

"Because it's not important, I'll bring it out, you can go in and see. Since you said that you didn't lend it out, but just wanted to take a look, then I will give you a quarter of an hour, I guess it should be enough, right? ”

"Naturally, it's enough, thank you, uncle."

Zhang Shou thanked him, and immediately entered the east house without hesitation. Even in the daytime, the room was lit with lights, and with the help of the light, he could see at a glance the three maps hanging on the wall. However, because the light was still not ideal, he only saw a rough outline, and then he noticed an unexpected item on the table under the map.

It was a huge globe.

His first reaction was that many people in the West didn't seem to believe that the earth was round these days, because the Columbus voyage that could really prove that the earth was a round ball had not yet begun.

Just when he was suspicious, Zhang Kang's faint voice came from behind him: "This is something left by Emperor Taizu, he said that he had a dream, dreaming that he was taken by the Emperor of Heaven into the sky, and found that this world is not a round place, but a ball, so he finally ordered the craftsman to make this." And then the lines and the map were drawn on it. Of course, a dozen were done at once. ”

"Since this is made by Emperor Taizu Chengtian in a dream, the first of the three drawings is also a map drawn by placing the sphere on a flat surface. The next two pictures are the comparison of the fleet after the voyage, although the small countries encountered are slightly different, but the general land outline is similar, Emperor Taizu is worthy of being born from the sky......"

Zhang Shou, who had already approached, listened to Zhang Kang's introduction absentmindedly, but did not look at the map on the wall, but looked intently at the warp and weft lines on the ball, at the seven continents and four oceans with clear outlines, at the location of the Ming Territory marked above, and at the major countries on the European continent.

He was also the man who had a huge globe in his home and a collection of various historical maps of the world in his study. Therefore, after carefully fiddling with the globe, he found that the positions of the seven continents and four oceans were not much different from his impression, quite accurate, and immediately judged from the approximate location of Spain and the Kingdom of Portugal that this was a world map of the fourteenth and fifteenth century.

At that moment, he had completely concluded that Emperor Taizu was not only a map controller, but also a map controller whose map skill points had reached full value. If it were him, it would be absolutely impossible to mark the Kingdom of Cassidy and the Kingdom of Aragon intimately when marking the Kingdom of Spain, not to mention, he couldn't remember the dividing line that twisted like a dog gnawing!

But soon, his gaze was drawn to the blocks of color that represented the Ottoman and Byzantine empires. And at this time, Zhang Kang's voice also sounded in his ears at the right time.

"After the big ship sailed all over the world, the imperial court naturally devoted all its efforts to find the larger countries of Emperor Taizu's dream, and these two countries were naturally at the forefront of the visit. Although they are far away from our country, they are not of my race, and their hearts must be different, and they must be guarded against. But in the end, when several ships returned after a lot of hard work, the news they brought back was very different. Dr. Zhang, you can take a look at the second picture. ”

Zhang Shou raised his head to carefully identify, and finally found on the second map that the scale was not easy to recognize, the Byzantine Empire had lost Constantinople and its territory had shrunk, and the Ottoman Empire, which had been dominant for a time in later generations, occupied a large territory except for the eastern part of the Aegean Sea, the former Misia, Lydia and Ephesus, and the vanguard had crossed Constantinople and invaded the former Thracian land possessed by the Byzantine Empire.

Recalling the history of the expansion of the Ottoman Empire, he vaguely realized that the territory of the Ottoman Empire should not be completed. But Zhang Kang's next words made his heart move suddenly.

"At the beginning of Emperor Taizu's accession to the throne, he defeated the state of Timur, and Timur later paid tribute. And to the east of this Timurid country is the Ottoman state that Emperor Taizu dreamed of. Emperor Taizu instructed the border army to continue to recruit troops from the north, and repeatedly defeated Timur's army, Timur could only press westward, and the Ottoman state was defeated several times, and later his strength rose and wanted to go east, but he died in the middle of the road. Later, when our big ship arrived, I inquired and found that the territory of the Ottoman kingdom was nothing more than that......"

Without waiting for Zhang Kang to continue, Zhang Shou suddenly asked: "When was this map drawn, and can you re-inquire about the news and draw it again?" ”

"Nope. It's a mess in that place. Speaking of being too chaotic, Zhang Kang frowned, and then said casually, "And those small countries in the west are fighting every day, they are very poor, and trade can't bring back much profits, in contrast, India is rich in production, so before Yingzong, after the fleet went south, most of them sailed through the Strait of Malacca and sailed to India." There were still people in the court who had made up their minds, but for some reason, they were all shelved. ”

The official ships of the imperial court went to sea in order to ask whether Taizu would have descendants scattered abroad, which would endanger the royal ruling power in the future; When private merchant ships go to sea, they want to dump goods in exchange for gold, silver, gems and spices. As a result, the Ottoman Empire, which had not yet expanded to the largest territory, was despised because it had been repeatedly defeated by the Timurid Empire, as were the small countries of Europe.

Before the discovery of the rich but backward Americas, the small countries of Europe really couldn't scrape too much gold, silver, oil and water!

Zhang Shou's gaze swept over the three maps on the wall, and finally came to a conclusion.

The first one used the most commonly used Yokomai projection map in the future, and the information on the globe was drawn on a flat surface.

The second one was modified on the basis of the first one, through the information of the voyage of the sea vessels, but only looking at the information that was only limited to the Ottoman Empire, the Byzantine Empire and some small European countries, and the dividing line was even quite a simple and crude straight line, he knew that the fleet's understanding of those countries was very superficial, and it was likely that it had been there once or twice.

As for the third one, it basically follows the second map, but it has been modified in the center position, taking the Ming Dynasty as the center of the world.

I have to say that Taizu hopes that the people of the country can open their eyes to see the world, but now it seems that their eyes are open, but the range is limited.

At the end of the day, civil strife kills. Today's Da Ming can not fall apart under several civil strife, which is amazing enough!

He sighed secretly, and then smiled at Zhang Kang: "Thank you, uncle, for fulfilling my rash request." ”

Seeing Zhang Shou's satisfied look, Zhang Kang couldn't help but smile: "I know that you readers like a sentence very much, it is better to travel thousands of miles than to read ten thousand books." Now that you've seen the map, the fourteen locks, please bother. ”

"That's nature." promised happily in his mouth, but Zhang Shou secretly he.

Just try it, he's not a god!