Yang Jian reacted the fastest, and said loudly: "The fastest by boat, I heard that from Leizhou, Guangdong to the sea, but it can reach Jiaozhi in three or four days." ”

"So close?" Liu Changan said strangely: "Why hasn't the Jiaozhi rebellion been quelled yet?"

"The Daming Sailor is corrupt and can't fight. Yang Jian said.

Yue Buqun said: "The reason is because our Chinese civilization has been stepping on the earth, working hard to cultivate this land, and we don't understand the ocean, and we are full of fear.

"It's not scary!" said the seven of them in unison.

In the past, everyone knew nothing about the ocean and was afraid of the ocean, but now after soaking in the sea for several months, they are no longer afraid of the ocean.

Yue Buqun smiled and asked everyone, "I don't know if you have noticed, what part of the ship did you see first when you saw the ship on the sea?"

The seven of them were still thinking about the people's fear of the sea, and suddenly heard the topic of the head of the house, talking about the ship, I don't know what the purpose is?

Yang Jian took the lead in raising his hand and said, "See the sail first, and then see the hull." ”

After speaking, he looked at everyone proudly, but the other six people didn't know, and questioned: "How is it possible? The ship is coming, and I can see it at a glance, how can I only see the mast?"

Yang Jian saw that everyone questioned him, and hurriedly said: "It's true, I saw it with my own eyes, the ship from the sea, I first vaguely saw the white sail on the mast, and then I saw the hull, did you say the boss?" Yang Jian asked the head for help, and the head must have known it.

Yue Buqun nodded with a smile and said, "Yang Jian observed very carefully, and it was true that he saw the sail first, and then saw the hull. ”

When Yang Jian heard this, he looked at the six people proudly, looking like you have little knowledge, and the other six people saw the head say so, it should be like this, but I really can't imagine how it can be like this.

Yue Buqun asked, "Yang Jian, then do you know why this is the case?"

Yang Jian's face stiffened, and he shook his head awkwardly, he also thought about this question, and asked a few experienced sailors who ran ships, but no one knew why?

It's been like this for thousands of years, and they've all taken it for granted, and no one has studied this issue deeply.

Yue Buqun said: "Think about it, what else is there, you see the top first, and then you see the bottom." ”

"I know!" Lin Yaohua raised his hand.

"Oh!" Yue Buqun was surprised, a child who grew up in the mountains actually knew that the sea level was round?

"You say. ”

"When climbing the mountain, the person on the opposite side goes up to the top of the mountain first, and then he sees his head first, and then he sees his whole body. Lin Yaohua said.

"It's the same with climbing the stairs, the person who goes up the stairs comes out first, and then he shows his whole body. "Sun Gong became a Taoist.

Yue Buqun nodded with satisfaction, these children are very observant and quick to react, and said with a smile: "Yes, these are all like this, from which we can know a common denominator, only when we go from a low place to a high place, will we show our tops first and then our whole bodies." ”

"So we saw the same sea boats, definitely coming up from a low place, so we saw the mast first. ”

"But the sea is flat!" Yang Jian wondered.

"How can you be sure the sea is flat?"

Yue Buqun seemed to be smiling, looking at Yang Jian, Yang Jian scratched his head, blinked, and didn't dare to answer.

"If the sea is round, and it's a big circle, you'll see the mast first, and then slowly go down to see the whole hull. Lin Yaohua hesitated.

Yue Buqun didn't expect it, but it was the child in the mountain who thought of this answer first, and said approvingly: "What does that mean?"

Lin Yaohua looked at the head hesitantly, not daring to speak, it was really too shocking for this answer, Yue Buqun nodded and encouraged: "Say it, it doesn't matter." ”

Lin Yaohua said in an uncertain tone: "It shows that the earth under our feet is round." ”

"Round, you say we live on a ball?"

Yang Jian was surprised: "Didn't the people below fall down?"

The others also thought it was too unbelievable, and shouted that it was impossible.

Liu Changan exaggerated smiled: "We have the sky on our heads, if the people below are also against the sky, it means that we are actually living in the sky, and we are all immortals!"

The other five people also thought it was funny and made fun of Lin Yaohua.

Yue Buqun tapped lightly on the table with his fingers and said, "Okay, don't laugh at Yaohua, then you say, in addition to this reason, what other reason is there to explain the phenomenon of seeing the white sails of the mast of the sea ship first." ”

Everyone stopped laughing, lowered their heads and thought, all kinds of reasons could not be explained, and the ball theory proposed by Lin Yaohua perfectly explained this, the more they thought about it, the more confused they became, and they all turned their heads to look at the master, hoping that the head could give an answer.

Yue Buqun pondered his words and said, "I thought that the earth under my feet was a round ball, the work of a creator, and he gave this ball a great power, which spread all over the sphere and beyond, pulling everything on the ball and preventing it from flying away. ”

"And, you see, the sun is round, the moon is round, and when the moon is eclipsed, the shadow of the moon that covers the ground under our feet is also round, so most likely, we are also round here. ”

"The sun is too hot and the moon is too cold, so the Creator has arranged for us to live here so that the heat will not hurt the cold, out of great mercy. ”

When the disciples heard this, they felt shocked again, but the more they thought about it, the more they felt that what the master said was reasonable.

Yes, we can see the details every day, but we have never thought about why, the head of the house is superior in wisdom, and he knows the subtleties, and what he said must be the truth.

Of course, Yue Buqun couldn't explain gravitation or anything to these disciples, even if he did, he didn't have Newton's ability.

But this theory slowly spread, and maybe there are people who are interested in it, continue to study, or try to verify, maybe they can complete the circumnavigation of the earth earlier than Magellan, and prove that the earth is a sphere.

Lin Yaohua under the seat, with an inexplicable look in his eyes, for the head who treats his kindness like a mountain, Lin Yaohua is bowing and worshipping, and his words and deeds are regarded as the truth, and now the head points out an earth-shattering truth, as a disciple, what reason is there not to practice and prove?

A sense of lofty mission filled his heart, and for the first time in his life, he set a lofty goal for himself.

In the past, Lin Yaohua, although he was gifted and ranked at the top of the children's class in learning and practicing, he had always been content, and the biggest wish in his heart was to enter the inner gate, become a disciple or elder of the inner gate, and receive a high monthly allowance, so that his family could live a comfortable and happy life.

But at this moment, Lin Yaohua felt that he seemed to be able to do something else, so that he would come to this world in vain, that Huashan would work hard to cultivate himself, and that he would not be in vain that the head of the house would carefully guide him.

Yue Buqun spread the theory of the circle of the earth, he was casting a net to catch fish, and he could catch one by one, but he didn't expect that the first net would catch one of the best disciples in Huashan.