"We walked south along the west coast of Africa, and after bypassing this place, we came to the east coast, and the east coast went north, and when we arrived here, it was almost the farthest place where Zheng He went to the West and the bones were all bundled."

"After arriving here, we can return to the South Seas through India and Ceylon, and arrive at Siam and Annam, which are our Guangxi, Guangdong, and Qiongzhou Islands, and go north along the southeast coastline of our Ming Dynasty, Fujian, Zhejiang, Jiangsu, Shandong, and Beizhili can return to the place of departure."

Liu Jin took a brush and drew an ocean route around the earth on the simple globe, and everyone widened their eyes one by one and looked carefully.

"Of course, we can also start from the west and go all the way west, and we can also return to our Daming again."

After speaking, Liu Jin also took a sip of tea again, and now he finally understands that being a teacher is not an easy profession, and he has only been talking for a long time, and his mouth is already dry after half an hour.

"It's incredible, this goes all the way east, can we really go back to where we were, are we really living on a giant ball?"

Some people shake their heads, it's really hard to accept this.

"Golden Continent, Australia, Europe, Africa, the world is so big, we are very small, just a little bit."

Some people looked at the location of Daming on the globe, and then looked at the continents outlined on the globe, and suddenly found that the original Daming was not big, just a small part of this world.

Whether it is the Golden Continent, or Europe, or the vast Africa, as well as the vast area north of the Ming Dynasty, it is much larger than the Ming Dynasty, and Australia does not look much smaller than the Ming Dynasty.

"It turns out that the world is so big, and this is the first time to understand this world very intuitively."

Although the middle-aged man does not show much emotion on the surface, this is a habit he has developed for a long time, and his joy and anger are invisible, but in his heart he is also very shocked.

He has been taught by famous teachers since he was a child, but what he taught was the Four Books and Five Classics, the Hundred Schools of Thought, and he learned loyalty, filial piety, benevolence, and strategizing, but no one had ever taught him to understand the world he lived in so systematically and comprehensively.

At this moment, he seemed to have opened a door, a door to see the whole world, clearly understood the location of his Ming Dynasty, and knew the customs and customs of various places in this world, and then he also wanted to take a look in his heart to confirm whether what Liu Jin said was true.

"It's interesting, it turns out that the world outside the Ming Dynasty is so vast, in the future, I will definitely conquer a territory ten times larger than the Ming Dynasty now, a hundred times larger, and rule the entire earth."

The young man with clear eyebrows and beautiful eyes also made waves in his heart at this time, and his eyes looked at the simple globe in Zhao Erhu's hand shining brightly.

"But I still don't understand why we live on the same ball?"

"It doesn't make sense!"

Lin Shuhong looked at it carefully, kept recalling Liu Jin's words in his mind, thought about it and said.

"I can't answer the question of why we live on a ball, but I can prove that we live on a ball in many ways."

Liu Jin thought for a while and said.

"In fact, not only is the world we live in a sphere, but the sun and moon that we see are also a sphere, and the ball of the sun is very large, the size of millions of earths, and the moon is smaller than the earth."

"Although the moon and the sun seem to be about the same size, this is because the sun is far away from us and the moon is close to us."

"Let's assume that this is the sun, and we are the earth, and the earth revolves around the sun, and this rotation is an elliptical trajectory, and when we are close to the sun, it is our summer, and when we are far away from the sun, it is winter."

"The sun's rays shine above the earth, and its distribution is uneven, at the earth's equator, which is this line."

Liu Jin compared the table where he ate to the sun, and then took out a brush and drew a line on the globe.

"The equatorial region is because the sunlight is direct, so the equatorial region has enough sunlight, high temperature, and summer all year round, and the South Seas belong to the equatorial region, so there is no spring, summer, autumn and winter here in the South Seas, and the four seasons are almost the same."

"From the equator to the north and south, the sunlight is oblique, so the temperature is getting lower and lower, and the changes in the four seasons of the year are very obvious, the further north or the more south, the lower the temperature, like Tatar and Warat, it is already quite cold."

"If you go further north, you will find a world of ice and snow, only a few months of the year are warm, and if you go to the northernmost and southernmost areas, these two places are like winter all year round, covered with ice and snow all year round, and it is a world of ice and snow."

Liu Jin divided the north and south on the globe, and began to explain why the Ming Dynasty would get colder and colder when it went north, and it would get hotter and hotter when it went south.

"I see, I'm Cantonese Aberdeen, it's not very cold all year round in Guangdong, it's very warm, but after I get to Jingshi, it's obviously much colder, what happened."

There was a man from Guangdong who spoke a strong Cantonese flavor of Mandarin, and seemed to understand something at once.

"Of course, the south of Guangdong is the South China Sea, and after that, you will reach Annam, Siam and Luzon, and these places will be warmer, and there will be no winter at all."

"Everyone comes from all over the world, there are south and north, friends from the north must know that the north is snowy in winter, friends from the south know that the number of days and times of snow in the south in winter will be less, the further south the less, there should be many people in Guangdong for more than ten years, more than 20 years are difficult to see a snow."

Liu Jin smiled and nodded and said.

"That's right, when I was in Guangdong before, I hadn't seen a single snow for more than ten years."

"Yes, I'm from Jiangxi, when I used to be in my hometown, I looked forward to some snow in winter all year round, but it snowed a few times a year at most, and now in the north, snow in winter is just a common thing."

Someone hurriedly chimed in, he didn't think there was anything strange about this before, but now when he thinks about it, he immediately understands.

"Haha, it turns out that people in the south rarely see snow, it seems that we are still good in the north, and it is very simple to see snow in winter."

"What's good in the north, it's cold to death in winter, but it's good in the south, it's not cold in winter, and I don't know how warm these places will be in Annam, Siam, Luzon, and Nanyang."