Although in the pre-Yuan period, people had a certain understanding of the concept of the world, in fact the concept is still very vague.

And the globe carved by Chen Kan with his own memory directly concretizes the vague concept of the world.

Zhu Di held a globe with a cloudy expression.

Chen Kan arched his hand at Zhu Di and said: "This thing was obtained from the merchant who met a merchant a few days ago. ”

Chen Kan lied casually, anyway, it was impossible for Zhu Di to go to the businessman for verification, even if he really sent someone to find it, he might not be able to find it.

"Fanbang merchants?"

Zhu Di's brows furrowed.

Chen Kan replied without humility or arrogance: "Yes, according to the merchants of that state, the land we live in is actually a sphere, and our human race lives on the continent of this sphere.

The merchants of Fanbang have named the sphere we live in as the earth, and this thing is a miniature version of the whole picture of the earth, and the Fanmen call this thing the globe. ”

"Globe?"

Zhu Di put the globe back on the shelf of the golden-winged Dapeng bird, and said lightly: "It's just nonsense, if people really live on a ball, doesn't that mean that I may fall into the sky at any time?" ”

Speaking of this, Zhu Di's words suddenly stopped, frowned, and said: "Speaking of heaven, I heard that you made a new gadget, what is it called a hot air balloon, and you used that thing to pick up my Chang Ning, right?" ”

The corners of Chen Kan's mouth hooked up a smile, and he replied: "Yes, but the hot air balloon was not created by the son-in-law, the son-in-law just improved it on the basis of the Kong Ming lantern." ”

Zhu Di lost his voice and said: "Kong Ming lantern? ”

But soon, Zhu Di reacted, and his eyes once again showed a look of surprise and uncertainty.

Kong Ming lanterns can fly into the sky, this is something that everyone knows.

When he was young, he also took Empress Xu to let go of Kong Ming Lantern more than once.

Since Kong Ming lanterns can fly to the sky, it seems not impossible to make Kong Ming lanterns a hundred times and a thousand times bigger, and to be able to fly people to the sky.

Looking at the change in Zhu Di's expression, Chen Kan knew that his goal had been achieved.

Chen Kan gave Zhu Di a globe, and he never thought of convincing Zhu Di to believe that he lived on the earth with his mouth.

He simply planted a seed of suspicion in Zhu Di's heart.

Ordinary people are suspicious, which is nothing more than burying their doubts deep in their hearts.

But the emperor is suspicious, especially since this emperor is still a real power emperor and can easily mobilize all the resources of this country.

Then, in order to answer the doubts in his heart, the emperor will definitely seek verification.

And Zhu Di is still so young, he has a lot of time to wait for others to prove that the earth is round.

With Zhu Di's temperament, once he knew that there were so many rich places overseas, he would definitely not set his eyes on the barren grasslands again.

Chen Kan's promotion of the Great Voyage can be completed logically.

Therefore, Chen Kan did not take the initiative to explain the globe to Zhu Di, but told Zhu Di about the principle of Kong Ming lantern.

……

……

"Hot air rises, cold air falls, and the mass of hot air is smaller than that of cold air, so Kong Ming lanterns can float to the sky, where did you know this?"

Zhu Di's expression when he looked at Chen Kan was very strange, he would never believe that this knowledge was taught to Chen Kan by Fang Xiaoru.

Chen Kandao: "Back to Your Majesty, in the Spring and Autumn Period and the Warring States Period, the official craft book of the Qi State "Examination of the Gongji", as well as the Hongzhang Ju work "Huainanzi" in the Han Dynasty, there have long been records and discussions on buoyancy, and the kid is just using buoyancy to reality. ”

Zhu Di naturally won't read a miscellaneous book like "Examination of Work", but "Huainanzi" is a classic, and Zhu Di has read it.

Hearing what Chen Kan said well, he turned his head to look at Ma He.

Ma He Huiyi, and soon found the book "Huainan Honglie".

Chen Kan motioned to Ma He to turn to "Huainan Wanbi Technique" and pointed to the "Hong Feather Sac, you can cross the river." "A few big words.

Zhengse said: "The ancients have long discovered buoyancy in water and applied it to all aspects of life.

In the same way, there is also buoyancy in the air, and the mass of the object needs to be less than the mass of the air......"

"In addition, we live on a ball and do not fall into the universe, also because the earth itself has a force, the son-in-law calls this force gravitational force, it is precisely because of this force that we can build cities on the earth, sail on the sea, apples are ripe, and they will not fall to the sky, but to the ground......"

Chen Kan flipped through the book and successfully circled Zhu Di and Ma He in a daze.

After listening to Chen Kan's crackling words, Zhu Di interrupted Chen Kan with a golden star in his eyes.

"Stop, you better keep this knowledge and discuss it with the doctors of Guozijian."

Chen Kan smiled shyly, he also knew that for a big man like Zhu Di, it was really difficult for a strong man to integrate this kind of practical operation principle into various machinery.

After all, he was so busy that he couldn't fit anything else in his head.

And Ma He, who was standing on the side, looked at Chen Kan's young face, and he felt a sense of admiration in his heart.

When I first met, this colt was so stupid that he was almost hit by a horse and died.

But today, just his explanation of buoyancy is enough to see that this horse master can indeed talk about the word erudite.

is worthy of being a student taught by Fang Xiaoru, this knowledge is really great.

Zhu Di eased up for a long time, and finally recovered from Chen Kan's knowledge trap.

He was afraid that if Chen Kan continued, he would become unfamiliar with this world.

hurriedly urged: "Go to the harem to pick up Chang Ning, I guess she should finish talking to the queen at this time." ”

Chen Kan didn't say much anymore, Zhu Di himself was a suspicious emperor.

He only needs to start many things, and the follow-up Zhu Di will naturally let people do it.

For example, he casually mentioned just now that there are gold and silver mountains overseas, and Zhu Di will definitely be interested.

He bowed to Zhu Di, bowed to Ma He, and walked out of the side hall and walked along the harem.

Watching Chen Kan's back gradually fade away, Zhu Di's eyes showed a thoughtful look.

He took the globe in his hand and checked it, and his eyes stared straight at the word Daming marked by Chen Kan.

He muttered to himself: "My Da Ming, is there only so much, the sea is really so wide, on the other side of the sea, there are really many lands that are not smaller than Da Ming?" ”

After muttering to himself for a while, Zhu Di turned his head to look at Ma He and asked, "Ma He, I remember that you grew up on water, right, what do you think of buoyancy?" ”

Ma He retracted his gaze and said: "Back to the words of the Long Live Lord, the slave maid has indeed lived on the shore of the Yunnan Sea since childhood, but this buoyancy, the slave and maid have really not studied it in detail, after all, since ancient times, boats have been floating on water." ”

"Funny ......"

Zhu Di stared at the ocean, which was more than twice as wide as the land, and fell into deep thought.

After a while, Zhu Di spoke: "Ma He." ”

Ma He bowed and said, "The slave is here." ”

Zhu Di said lightly: "This kid said that there is a silver mountain in the Japanese country, which is inexhaustible, you take the sailor to see it, if it is true......"

Ma He heard the meaning of Zhu Di's words, and immediately knelt down on one knee and said: "Long live the lord, rest assured, the slave and maid promise to complete the task." ”

"Go for it......"

……

After brainwashing Zhu Di, Chen Kan only felt refreshed, and even when he walked, his steps were much lighter.

Before, he was still worried about how to promote Zheng He to go to the West.

Now that there is a globe as proof, presumably Zhu Di will not learn from Kang Hemp Zi to put the globe on the shelf, right?

But there's only so much he can do.

Anyway, let Chen Kan take the sailor to go around the earth to prove to Zhu Di that the earth is round, Chen Kan will definitely not be able to do this kind of thing.

How dangerous the sea is.

Not surprisingly, Chen Kan was stopped in front of the palace gate again.

The two young little eunuchs nodded at Chen Kan and said: "Master Ma forgive me, it's not that the slaves and maids won't let you in, it's really the harem land, if there is no order from the queen's mother, even Your Majesty, you ......"

Before the words of the two little eunuchs were finished, a childish voice sounded behind the moon gate: "Queen Yizhi, Xuanfu Ma Chen Kan enters the palace~"

In the harem, there is only one person who really speaks of the matter, and that is the queen, which is a rule set during the time of the great grandfather.

The queen is the harem, and the emperor is the world.

So if Chen Kan wants to enter the harem, he has to nod from the queen, and Zhu Di doesn't even count what he said.

As soon as the words fell, a tiger-headed little head poked out of the moon gate.

His Royal Highness, the dignified eldest grandson, to do this kind of work of spreading the word, it sounds a bit out of place.

But Zhu Zhanji's chubby face did not have this kind of consciousness at all.

He belongs to the category of people with ADHD, as long as he can have fun, he is willing to do anything.

Hearing this, the two little eunuchs looked at each other and let adult men enter the harem, which was the first time since His Majesty ascended the throne.

You must know that even during the period of the great grandfather, except for Xu Datang and those old brothers of the great grandfather, there were few people who could step into the harem.

But it was the founding period of the country, and the rules were not perfect.

In the back, various rules and regulations were established, and Xu Datanghe rarely entered the harem.

Now the queen has broken the rules for a new colt, what kind of grace is this?

They clearly know that even the concubine married to the queen's own daughter does not have this treatment.

Chen Kanke didn't care what the two little eunuchs thought, and now that he had the permission of the lord of the harem, he strode into the moon gate and greeted the little fat pier.

He arched his hand and said, "His Royal Highness the Emperor Eldest Sun." ”

Xiao Fat Dun's eyes rolled, and he suddenly hugged Chen Kan's thigh: "I heard my sister-in-law say that you gave a very special gift to the imperial grandfather?" ”

Chen Kan nodded and said, "Back to Your Highness, it's just a gadget." ”

But I was a little suspicious in my heart, what kind of moth is this little chubby dun going to do?