Great Tang princess

Chapter 630 Geography Popularization
The result of not seeing each other for a long time is that the family chatted for a whole morning. Even though there was constant communication during the six months of not seeing each other, the atmosphere of face-to-face chatting is always incomparable to letters.

Perhaps most of the chatting process is useless nonsense, but it also has a lot more warmth than letters composed of words.

Of course, when Li Yuechen wrote letters to his family, he would occasionally add some emoticons, but it was a pity that at her age and personality, her mother was destined to not be able to understand such things.

Even Shangguan Wan'er and the others couldn't understand it thoroughly, but they didn't hate it either.

After lunch, although the atmosphere of chatting had passed, it did not dissipate. Instead, they set up a table in Jixian Temple and started playing mahjong.

Others were chatting and fishing while having fun.

Now the mahjong in the palace is no longer made of wood like Li Yuechen's at the beginning, but made of agate.

It feels very good to the touch, and to Li Yuechen, this is definitely a typical representative of those who have money and have no place to spend it.

However, the royal family has been like this since ancient times, gathering the power of the world to support a family, the level of luxury is completely unreasonable.

During the process of playing mahjong, everyone also chatted from time to time, and they talked about the issue of marriage.

Wu Zetian grabbed a card, touched it lightly with his middle finger, and then pushed it out in reverse: "Chener's intention is to let the court legislate and set the age of marriage at 14 years old?"

"En!" Li Yuechen nodded, "In this way, it can reduce the difficulty of childbearing. Originally, it should be over 16 years old, but considering that the average life expectancy is not high nowadays, it is better to be over 14 years old."

Li Xian played a chicken: "16 years old? Why?"

"Because strictly speaking, people over the age of 16 are considered fully developed." Li Yuechen explained while touching cards.

"The girl's ceremony is held at the age of 15, which is quite accurate." Li Xian looked suddenly enlightened.

The Ji ceremony is the same as the men's crown ceremony, it is a coming-of-age ceremony.

According to the weekly system, the crowning ceremony should be held when a man is 20 years old, but since ancient times, most of the emperors and princes have held it earlier in order to take charge of state affairs as soon as possible.

At this time, almost all of them are held at the age of thirteen or fourteen, and some even at the age of 12.

In addition, during the Taizong period, in order to rapidly increase the population and encourage childbearing, the policy of "men who are fifteen and women who are over thirteen must marry" was put forward.

Therefore, the coming-of-age ceremony and marriage are generally earlier.

"Actually, it's still a little different." Li Yuechen shook his head slightly. "Sixteen years old is just a mature body, but the mind is still immature. It's just considering the average life expectancy... In short, the age that is really suitable for marriage should be after 16 years old."

Such an argument made everyone present feel a little unbelievable, 20 years old... For many people, half of life has passed.

"If Auntie doesn't believe it... Now that the medical school has been established, let them do a survey." Li Yuechen said, "I believe the results will be the same as what I said."

Regarding this point, Wu Zetian still believed it. It was because of this daughter's words that the law that blood relatives within three generations were not allowed to marry was established.

"Well, if that's the case, then let's make a decision." Wu Zetian nodded, "Afterwards, Yiyang wrote an article and published it in the newspaper, and the court issued a notice."

"Yes!" Princess Yiyang nodded in agreement.

……

The matter was settled without any effort, Li Yuechen was in a good mood, and pushed the cards in his hand: "Okay, fuck it!"

Li Xian, who was sitting next to him, was helpless, thinking that even if his mother dared to pick up the cannon, this younger sister was really lawless.

At this time Zhang Chengxin came in with two little eunuchs holding trays: "Saint, Your Highnesses, how about eating some melons from the Western Regions? It's already chilled."

"Yeah!" Li Xian happened to be unhappy because he lost the money, so he immediately waved: "One piece!"

Seeing the piece of melon that Zhang Chengxin handed him respectfully, Li Yuechen was taken aback suddenly, and stared at his brother's hand in disbelief.

Li Yuechen's sudden daze made Li Xian a little confused about the situation. He thought for a while and said, "Ah, speaking of which, Yuechen hasn't eaten this melon yet, right? This is a tribute from the Western Regions this year, and it's very sweet!"

While talking, he handed over the unbitten melon in his hand.

And Li Yuechen stretched out his hand to take it in a daze, and didn't bite immediately, but lowered his head to observe carefully.

Shangguan Wan'er also laughed beside her and said, "I deliberately didn't explain this to His Highness, but I also thought that His Highness would taste it for himself when he comes back. It's really sweet."

"Hmm..." Li Yuechen nodded, and then took a bite directly.

There is a slight deviation from the taste in memory, and the sweetness has not yet reached the sweetness in memory, but in this era, it is indeed unimaginably sweet.

Although the green peel and flesh still have a lot of gaps with the future appearance, if you look closely, you can still recognize it.

"How is it? Does it taste good?" Li Xian took another piece with a smile, "This melon..."

"Hami melon!" Li Yuechen muttered to himself, and then looked up at the whole melon on Zhang Chengxin's tray in disbelief.

Li Xian raised his eyebrows: "Yuechen knows about this thing? Could it be that he has eaten it before?"

"Eat... haven't eaten it!" Li Yuechen shook his head, almost slipping his tongue, and then asked: "But this thing is from the Western Regions, right? How did it get here?"

It is not uncommon to have cantaloupe in this era, but the question is how did such fresh melons come here?

It stands to reason that the distance from the Western Regions to the mainland is so far, and the fermentation has already been completed when transported by horse-drawn carriage.

"Speaking of this, Yuechen, you really didn't expect it!" Li Dan took a piece of melon with a smile, "They transplanted the melon with its roots and soil into a wooden barrel before it was ripe. I didn’t forget to water it on the way, and when I arrived in Dongdu, it happened to be ripe and very fresh!”

"Huh? Is there still such a practice?"

Li Yuechen felt a little unbelievable, but thinking about it carefully, this seemed to be the best way the ancients could come up with.

She opened her mouth again and took a bite: "Well, the taste is not bad!"

"Speaking of which, Yuechen's greenhouse experiment was also successful, can some melons be planted?" Li Dan asked.

"Impossible." Li Yuechen shook his head, "Planting is not a big problem, but even if it is successfully planted, it will not be so sweet. This kind of sweetness can only be found in the Western Regions."

Li Xian asked while eating: "Why?"

"In the Western Regions, the sunshine time is extremely long in summer. Only in this way can such sweet melons be grown." Li Yuechen explained.

"Then you can't let the sunshine time in Dongdu be longer?"

As soon as these words came out, Li Yuechen couldn't help but choked up: "You really think of me as a god? This is determined by the geographical location..."

Wu Zetian couldn't help laughing: "You have achieved so much since you were young, so it's normal for him to think so. Then why does the summer in the Western Regions last so long?"

Li Yuechen looked around, then walked to the side and took the globe that he made earlier and gave it to his mother and put it on the table: "I said that I will live on the earth, right? Is the ball spinning obliquely?"

Wu Zetian looked around at the other children, then shook his head slightly: "Isn't it intentionally made like this for the sake of beauty?"

"Of course not, but this is how the ball revolves." Li Yuechen replied, and then picked up the globe, "Assuming that Auntie is the sun now, then the earth revolves around the sun like this."

While explaining, she took the globe and circled Wu Zetian in a circle: "After this circle, it is a year. And in the process, every time the earth makes a circle, it is a day. Has anyone discovered the characteristics? "

Princess Xuancheng thought for a while: "I see, when the earth rotates, the side facing A Niang is daytime, and the other side A Niang cannot see is night!"

"That's right!"

Li Yuechen raised his hand and gave her a thumbs up, giving her a big thumbs up. Then, while circling around Wu Zetian, he slowly turned the globe in his hand: "At this time, has anyone discovered other problems?"

For a moment, everyone fell silent, thinking carefully about the problem.

Princess Xuancheng stared at the globe, and after looking at it for more than ten seconds, she suddenly said, "Because the earth is oblique, there will always be a sun at the middle point! The other side is the opposite!"

"Correct!"

Li Yuechen opened his eyes wide and nodded vigorously. He really didn't expect that this sister is so smart!

At this time, Wu Zetian also realized the problem: "Doesn't that mean that there is always day and no night in that place?"

"My mother's idea is right, but it's not the truth!" Li Yuechen nodded, then took the brush on the table and dipped a little ink, and drew a light black line on the North Pole.

"This place is called the North Pole. This circle is called the Arctic Circle." Li Yuechen explained, "According to what I just said, this place should be full of day and night all year round, right?"

Although she could understand what she said, the impact of this content was still a bit big for the ancients, and everyone could only nod in a daze.

Seeing them nodding, Li Yuechen walked around his mother with the globe again: "Then if the line that the earth revolves around the sun is not parallel. At this time, the earth is rotating at this position..."

At this time, she had already made half a circle, and the next moment she slowly raised the globe from the height of her waist to be parallel to her head, and then continued to walk around her mother for the second half circle: "Then this time, it is taller, what happens?"

The conversation has reached this point, not to mention Princess Xuancheng, other people can understand, Li Xian immediately answered: "The other side is daytime, and the North Pole has turned into night instead! Because A Niang can't see it!"

"Brother is smart!" Li Yuechen put down the globe with a smile, and praised with a thumbs up: "The other side of the North Pole is naturally the South Pole. Therefore, it is exchanged every six months. In summer, the North Pole maintains daylight for half a year without night. And Winter is just the opposite, with half a year of darkness and no daylight. Now, do you understand the reason why I said that the summer in the Western Regions has long hours of light?"

Li Xian nodded slightly: "I see, the Western Regions are close to the Arctic Circle. Therefore, the sunshine time is long in summer!"

"That's right, half a year of day and half a year of night, let's call it polar day and polar night. Because of these phenomena, the days in the Western Regions are much longer in summer than here. Naturally, in winter, the nights are also longer than here."

In fact, people in this era understand the phenomenon of long days in summer and short days in winter. This feeling is already obvious in the mainland, let alone places like Xinjiang.

Right after Li Yuechen finished speaking, everyone present, including Wu Zetian, lowered their heads in thought, and for a while, no one questioned her.

Although this set of theories can be called evil in this era, it depends on who said it. With Li Yuechen's weight, even if she says that eating shit can cure all diseases, most people will believe it.

What's more, what she said is true. There are definitely many people from the Western Regions who can be seen in the east, and they have heard about these situations in the Western Regions.

So although I can't believe it, no one can doubt anything. As for Wu Zetian and others, they actually believe her words in their hearts.

It's just that this kind of thing has a great impact on the ancients after all, so even if I believe it in my heart, I still dare not admit it for a while.

It's not that there is something to be afraid of in a family, it's a human instinct.

Faced with this situation, even if you believe it in your heart, you still don’t want to admit it subconsciously, because once you admit it, it means that your previous cognition has collapsed.

Although I can't tell what the reason for this fear is...

Li Yuechen didn't expect that today he would teach his family some geography knowledge, which would involve the relationship between the earth and the sun, but fortunately, it seemed that their ability to accept it was not bad, and they didn't have any symptoms of madness because of it.

This is not alarmist talk. When people come into contact with things that are enough to collapse their cognition, they may really become crazy. Some people will even turn to study philosophy because of this shock.

In Chinese, this phenomenon can be called Enlightenment.

But enlightenment is not necessarily a good thing. If you can realize it, you will be a generation of living saints, comparable to Confucius.

If you can't realize it, you may become silent, autistic, or even crazy.It is also commonly known as obsession.

It's like a psychiatrist becoming a psychopath in the end. There are not many examples of this kind, and there are quite a few of them!
In order to prevent them from thinking too deeply, Li Yuechen clapped his hands in time: "Okay, that's the end of this topic! Brother just said that the problem of planting this melon in the interior has been answered. Compared with this thing, it is better to plant watermelon Better."

"Watermelon?" Li Xian frowned, "Is it worth planting?"

The watermelon in this era has thick skin, less flesh and more seeds. The key is that it is not too sweet, and the taste is rather sandy.

"Brother, don't underestimate this watermelon. If it can be cultivated artificially, it will be regarded as national wealth in the future!" Li Yuechen said with a slight smile.

In the future, many people from Japan and the universe country will not want to go back. One of the reasons for staying is because watermelon can be eaten with a spoon in this country.

(End of this chapter)