I open a history tutorial class in Daming

Chapter 66: The First Emperor, you have done something evil! (Please order first)
No one has an opinion.

The six students who arrived earlier had been eager for Song Shen to talk more about things overseas as soon as they heard him mention potatoes and sweet potatoes.

Except for anorexics, no one would hate food, especially since they are the pillars of various dynasties, it is even more impossible for them to refuse.

What's more, they didn't miss Song Shen's last sentence.

The homeland is in ruins and corpses are everywhere...

Does this have anything to do with overseas?

As for Li Shimin and the other five who joined the tutoring class last, when they saw that everyone around them was staring at Song Shen, anyone who was not a fool would know that this must be a good thing, so after exchanging glances, they sat quietly in their seats and listened silently.

Song Shen thought about it and took out a round, khaki ball with a little mud on it from his system backpack.

It was one of the potatoes he had saved from his already pitiful five pounds - just in case.

"I mentioned to you before that there are several very powerful crops overseas, namely potatoes, sweet potatoes and corn."

"Everyone can see that the one in my hand is a potato."

"These should have been explained to you by your biology and geography teachers, but our conditions are limited now, so just treat it as an extension of world history—"

"Potatoes, also known as potatoes, originated in tropical mountainous America. They were introduced to India in the 16th century and then to my country. In the 21st century, they have been widely cultivated in temperate regions around the world."

Song Shen looked at the students whose eyes were becoming increasingly confused and couldn't help but laugh:
"I know there are a lot of words here that you can't understand, like what is America, what is India, what is the 16th century and the 21st century, and the temperate zone."

"First, let's take the Ming Dynasty, which was the last dynasty to exist, as an example. Zhu Yuanzhang was born between 1328 and 1398, so he belonged to the 14th century. Zhu Qizhen was born between 1427 and 1464, so he was in the 15th century. One century equals one hundred years."

"I will talk about other things later, but you only need to know one thing now, that is, except for potatoes, corn and sweet potatoes, their origins are all in the same place, that is, America."

"America is a place far away from other continents. Until the 15th century, the inhabitants of that continent were called Indians. In our eyes, they were still uncivilized savages. They maintained the primitive tribal form, but had reached a high level in agriculture and craftsmanship."

"The famous great voyage of discovery was when a group of white people accidentally reached America through shipping in the 15th century. They obtained the land and then colonized the Indians. In layman's terms, you can understand it as using a large army to flatten a country, occupy the land, and make the people there their slaves."

"Oh, right. The general view of later scholars is that Indians are the same people as us in Asia. They must have migrated across the strait thousands of years ago. They are similar to us, with yellow skin."

"If you have any questions, you can ask them now."

Everyone in the classroom looked at each other.

To be honest, among so many students present, even Zhu Qizhen, who had the weakest ability in government affairs, was well-read, not to mention other good students like Zhang Liang and Zhu Biao.

Others like Zhu Yuanzhang and Cheng Yaojin who were not good at studying simply did not have the conditions to study when they were young, but they could not be stupid, otherwise they would not have achieved success in their careers by luck alone.

But even these eleven people could see confusion in each other's eyes.

I seem to understand what is said... but it goes in one ear and out the other. This knowledge doesn't even enter my brain!
Song Shen didn't disturb them from thinking. He just watched the show with his thermos cup in hand and smiled, enjoying his leisure time.

After a long silence.

"Sir, since you said that the indigenous people of America also migrated there, even tens of thousands of years ago, then can the route they took to migrate there still be used today? If so, why haven't we discovered it yet?"

Everyone's eyes turned over.

The person who raised his hand to ask the question was Emperor Wu of Han, Liu Che.

He was not a person who liked to raise his hand to ask questions or answer questions, but this time, Liu Che's face was solemn and his eyes were burning. Anyone could see his thoughts -

Liu Che wanted to get that land so badly that he even questioned Mr. Song for it!

Song Shen smiled and said:
"You have a very creative mind, Mr. Liu Che. Good question."

"Let's first talk about whether that road is still passable."

"My answer is, no."

"Secondly, let me highlight the key point. I just said that their migration route was a guess, but it also has a basis, and I said it was ten thousand years ago."

"First, remember this. Let's talk about another premise, which involves a very basic common sense concept—"

“We all live on one planet.”

"The place where we stand, the mountains and trees, even the sky above our heads and the vast ocean, all of these things are on a sphere. I know that in your concept, the sky is round and the earth is square, and the sky is like a dome covering the whole world, but it is not true. In addition to the sky, the earth is also round. The sky and the earth are collectively called the Earth."

"Swallow all the questions in your mind and tell me why we can't take that route."

"Tens of thousands or even hundreds of thousands of years ago, all the continents on Earth were together. Later, the movement of the earth's crust intensified, causing the plates to gradually separate. The sky collapsed and the earth cracked, seawater poured into the cracks, and the continents were divided into several plates." "Let's not talk about the process in between. The Indians didn't run over at that time. I say it again, they went over 20,000 years ago. That era was called the Ice Age, and the temperature was very low everywhere."

"At that time, there was a land bridge in northern Asia where we are. It was not submerged by the sea at that time. It was even a grassland where animals could survive and people could pass through. But later, the temperature rose, the glaciers melted, and the sea level rose, gradually submerging the place, and it became a strait."

"To sum up, do you understand? This place did exist. Human skeletons from that period have been dug out from the bottom of the strait in later generations, proving this. But now we can't reach that continent in the same way, unless we take a detour via an ocean voyage."

Although he had attended five classes, Song Shen had been lazy before and had never attended classes seriously, let alone spoken so many words in one breath, so it was inevitable that he had a dry mouth and itchy throat at this time.

He glanced at the colorful faces of the people below and saw that their worldview had experienced a huge shock and was recovering and rebuilding. He did not disturb them, but just drank water sip by sip, waiting for these students to wake up.

As for why I changed my mind, I decided to study hard...

Results are actually secondary.

The main problem can be traced back to the fact that he got the potatoes.

In addition to the existing problems with alcohol and potassium permanganate, he was also at a loss regarding subsequent planting.

Song Shen was very clear that he was just a talker when it came to farming. It was ok for him to occasionally talk about a few basic methods he heard from his roommates, but when he really encountered a problem and was asked to come up with some effective methods, the details were so specific that it was difficult to grasp.

Now the potatoes have been handed over to Zhang Wei. Although there are still a few months, what can he do with this little effort? The system will not be kind enough to let him get a basic agricultural production guide. He can only figure it out on his own.

He was a city dweller and had never studied a related major, so he was at a loss. Fortunately, he had a flash of inspiration and found a loophole when preparing for class -

The system can prepare all the materials needed for class.

Following this idea, he gave students more extracurricular knowledge in "world history", expanding the scope of the course to the origins of various crops and the time when they entered China, and even more specific things. Then they could naturally get system information from the materials, and find out how to grow potatoes, etc.

I hope these students can understand something and ask more relevant questions...

Song Shen was daydreaming, his mind full of thoughts about how to fleece the sheep, when suddenly a familiar, deep and rich voice reached his ears.

"Sir, I am more interested in another thing you just said."

Everyone looked and saw that it was Ying Zheng who raised his hand.

Ying Zheng stood up, his face not looking very good:

"You said that thousands of years later, foreigners will destroy our homeland and leave corpses everywhere... What does this mean?"

"Foreigners, are you referring to the Huns and other barbarians?"

“No matter how dynasties change, could it be that the emperor who could replace the Qin Dynasty and firmly establish his throne is so incompetent that he could be invaded by the barbarians from the north?”

Including Song Shen, everyone nodded in sudden realization.

It is very normal for Ying Zheng to care about this matter.

It is understandable, very understandable, that a man who could mobilize the entire country of Qin to build the Great Wall would have some complex about resisting foreign enemies!
The emperor knew best the function of the Great Wall, otherwise it would not have been used for three years in the Ming Dynasty, with three years of repairs and three years of use.

but……

Song Shen looked at Li Shimin, then at Zhu Yuanzhang, and smiled awkwardly.

He thought to himself, "Emperor Qin Shi Huang, you may not know that the barbarians from the north have invaded more than once."
The Rebellion of the Eight Kings in the Western Jin Dynasty led to the Five Barbarians' Invasion of China. It was only after the Sui Dynasty unified the country that the war that had been disrupted by the northern barbarians for three hundred years was completely ended. Li Shimin was not far away from this incident and probably had a say in it.

Before the Ming Dynasty, the Mongol cavalry from the north almost destroyed Europe. They not only took control of the Central Plains, but almost created a global village. Zhu Yuanzhang, the founding emperor of the Ming Dynasty, was an eyewitness to the Yuan Dynasty's rule and had more say than Li Er.

Sure enough, Li Shimin looked at the table in silence, while Zhu Yuanzhang scratched his beard and eyebrows. They both seemed to be a little traumatized by these two periods and were extremely reluctant to speak.

Song Shen coughed and smiled at Ying Zheng:
"Mr. Ying Zheng, you misunderstood. The foreigners I mentioned are not the nomadic peoples in the north. This incident happened hundreds of years later than the Ming Dynasty."

"But speaking of it...hiss, Ying Zheng, part of this seems to be your fault, right?"

Ying Zheng stood there in a daze, raised his noble right hand in disbelief, extended his index finger and pointed at himself.

"…I? What does this have to do with me?"

Song Shen raised his eyebrows:

"Do you still remember Xu Fu?"

(End of this chapter)