Making a calendar? ”

Erliu suddenly fell into a state of coercion, what the hell is this, why can't you understand?

Ye Feng said with a smile: "We can divide the days into 30 days, 30 days are a month, 12 months is a year, as for how to divide it, we can start from the moon!" ”

As he spoke, he pointed to the sky and said, "As you just said, every 30 days is exactly the time when the moon is at its fullest, and we take this basis as the month, so take the moon when it is full, and take this day as the middle of the month, that is, 15 ......."

Ye Feng's set of calendars, to put it bluntly, is formulated in accordance with the method of formulating the lunar calendar.

In the lunar calendar, its months are established according to the time it takes for the moon to orbit the earth, which is a little more than 29 days.

Therefore, the ancient people of our country divided the month into a big month and a small month, and formulated a calendar of 30 days for the big month and 29 days for the small month.

Subsequently, Ye Feng carefully explained the laws of motion of the earth-moon system with him, and originally wanted to explain the solar system directly, but after thinking about it, it was still too complicated for primitive people, so he didn't say it for the time being.

When Erliu heard his words, it was like discovering a new continent, a year of surprise, he had observed the moon for so long, but he didn't expect that there was such a complicated way inside.

Then he seemed to remember something, and hurriedly asked: "By the way, Ye Feng, you said that the world we live in is called the earth, so as a ball, how can the people who live below not fall?" ”

Ye Feng suddenly felt his throat and eyes, whether something was blocked

How to explain it? Do you want to explain gravity to him? Grab Newton's grandfather's job?

Ye Feng felt bitter in his mouth.

Seeing Ye Feng's expression, Erliu was immediately puzzled, and hurriedly said, "What's wrong Ye Feng?" ”

"This question is very complicated to explain, and I will explain it to you slowly when you complete this task!"

Erliu nodded with a sigh, and then asked: "Ye Feng, there are 12 days in a month, and there are 12 months in a year, so how many days are there in a year?" ”

"Uh......" Ye Feng then remembered, this item can only count to 26.

Isn't it a dream to ask someone who can't even count to make a calendar?

That's embarrassing.

Ye Feng's face turned pale, and he said: "You can count to 300 within three days, otherwise you don't want to look at the stars again in your life." ”

Erliu's face turned pale, and he thought that when he counted, it was even more uncomfortable than killing him, and said, "Can you not count?" ”

Ye Feng shook his head regretfully and said, "Whether it's counting, you also have strong calculation skills, but don't worry, I will teach you alone!" There are not many people in the tribe with this treatment. ”

Erliu's expression was like that of a later generation of primary school students who opened a small stove alone due to poor grades, and felt like he had eaten a piece of Coptis chinensis, and his mouth was bitter.

Seeing his appearance, Ye Feng smiled and said, "Okay, it's decided, you can slowly look at the stars there tonight, and come to me tomorrow!" ”

After speaking, he waved his hand and walked away.

When I looked up at the sky at 45 degrees, I always felt as if they were mocking me.

……

"Hiss~, I seem to have forgotten something!" After Ye Feng explained to the warrior that he could go up to the city wall on the second and sixth nights, he suddenly remembered that he didn't seem to have something to do.

"What did I come out of here for?" Ye Feng scratched his head, and then suddenly remembered. "Oh! I want to see Chu Yun coming! ”

Thinking of this, he hurriedly rushed to Chu Yun's side.

Looking out the window at the way Chu Yun fell asleep, Ye Feng relieved himself.

Looking at this, she should be fine.

smiled, a wave of sleepiness hit, and Ye Feng also went home.

……

The next morning, after breakfast, the clansmen were ready to work again as usual.

"Erliu, what are you doing here?" Erliu's head was carrying tools, and when he saw that Erliu was walking in the opposite direction without anything, he asked.

Erliu smiled shyly and said, "Room chief, Ye Feng asked me to go to him yesterday!" ”

"Oh? So what were you doing yesterday? Hearing his words, the head of the room was also curious, wondering what he was doing with Ye Feng last night.

Erliu pointed to the city wall and said, "Yesterday, Ye Feng took me there and let me look at the stars on it!" ”

"Oh, look at the stars!" The head of the room nodded, suddenly realizing that what he said was wrong, and exclaimed, "Look...... Looking at the stars? ”

He expressed his shock, when did Ye Feng become so idle?

Erliu saw the expression of his room leader, and nodded stunned.

No matter how stunned his room chief was, the people around him who heard his words were all surprised, they didn't expect that Ye Feng, who was originally high, was so idle.

In their minds, going out to look at the stars in the middle of the night is absolutely full.

But when they thought about what Ye Feng did, they naturally had his deep meaning, so they didn't think much about it.

The head of the room waved his hand and said, "Since Ye Feng asked you to go, you should go quickly!" ”

He had a hunch that his roommate, who looked up and didn't look down, was going to soar.

Erliu nodded and went straight to the cave where Ye Feng was.

This cave was originally a storehouse for the tribe to store food, but after the construction of a spacious house, this cave with limited space was put aside, and now it is used by Ye Feng as a classroom to teach his "in-house disciples".

Uh, the cave - really, the disciple who entered the house.

When Erliu stepped into the classroom, he found that there was no trace of Ye Feng here.

There are only two little children, a man and a woman, who are playing and chasing.

These two little kids are none other than Tingting and Xiao Zhengtai.

Unable to find Ye Feng, Erliu had no choice but to say to the two children: "Eh, those two children, do you know where Ye Feng is?" ”

The two children stopped moving, looked at the stranger, tilted their heads and said, "Who are you, what are you doing here?" ”

Erliu hurriedly said: "My name is Erliu, Ye Feng asked me to come here to learn knowledge!" ”

"Oh!" Tingting dragged out the last note, her eyes rolled, full of endless cunning, and said: "If you want to learn knowledge here, you must answer one of our questions!" ”

Although Erliu was not confident in his knowledge level, he didn't think that these two little boys could ask any problems, so he nodded.

"Well, let me ask you, how many steps do you need to take to turn a mammoth into a clay pot with a lid?"

To be continued

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