"This is fireworks?"

On the edge of the playground, Li Er stood beside Li Zexuan with his hands, he looked up at the brilliant fireworks in the sky, the surprise in his eyes flashed, although he is the emperor of the world, but this kind of fantastic and magnificent spectacle is also the first time to see it! He couldn't help muttering to himself.

Seeing this, Li Zexuan couldn't help but feel a little proud in his heart, he could shock Li Er, a famous monarch through the ages, how many people in the world could do it?

However, while being proud, his eyes were still very vigilant to pay attention to the group of students who ran to light fireworks in the field, after all, this thing blew up people, and the consequences were still very serious, so he had to always pay attention and be ready to save people!

"Yong'an Hou, how can this firework quickly rush into the sky?"

Suddenly, Li Er asked such a "little white" question, it seems that the sky has a very strong attraction for the ancients!

"Your Majesty, Qingque should know about this problem, so let him explain it to you!"

Li Zexuan arched his hand and said.

"Oh? Do you know why? ”

Li Tai, who was standing on Li Er's left hand side, stood up excitedly when he heard the words, and replied:

"Father, as far as my son knows, the reason why this firework can quickly rush into the sky is related to the gunpowder in it! Once this gunpowder explodes, it will produce a very powerful thrust, which will make the projectile part at the top of the firework overcome its own gravity and quickly fly into the sky!

And the upper end of the projectile, its fuse has been ignited when it flies out of the pipe, the length of this fuse is calculated by the mountain chief, so it can be guaranteed to fly just near the highest point and explode every time! That's what we're seeing now! ”

Li Tai, who was unruly in the past, has now become a big man in the physics world, explaining to Li Er the force analysis of fireworks and cannonballs, and Li Er, Empress Changsun, Li Chengqian, Changle and others are stunned!

"Thrust, gravity?"

In the face of these new terms, Li Er was a little caught off guard, although he glanced at the physics textbooks of the academy a few times, but only a few glances, and did not study them carefully; Of course, what caught him off guard even more was that his son had only been in Yanhuang Academy for half a year, how could he know so many things that Datang didn't have before?

Seeing his father's face full of surprise, Li Tai's sense of accomplishment instantly exploded, just like some children who know something amazing, they show off and ask for praise in front of their parents, Li Tai is now this kind of person with a strong desire to express.

"Ahem! Father, when it comes to gravity, it's actually just..."

"Alright, alright! I roughly understand what that means! ”

Li Er waved his hand and interrupted his son's further "popular science", he is the supreme of a country, and he is so "preached" by his own son, does he not want to lose face?

Li Tai had no choice but to shut his mouth stupidly.

Changle on the side suddenly had a whim: "Brother Xiaoxuan, since this gunpowder can propel the projectile into the sky, can it send people to the moon?" ”

Li Er's eyes suddenly lit up, and he set his eyes on Li Zexuan. The experience of observing space with an astronomical telescope in Yanhuang Academy that night made him unforgettable, and at this moment, Changle's suggestion made him can't help but feel a little excited.

Although Li Zexuan said that night that if you want to send human beings into space, you need at least hundreds of years of technology accumulation, but what if there is a shortcut?

"Poof~!"

When Li Zexuan heard this, he almost vomited blood, what Changle said was a bit similar to a rocket, but he didn't see it, although the little girl didn't have much contact with engineering, this idea was still quite bold.

"Changle, although gunpowder is infinitely powerful and can push objects into the sky, once this thing is ignited, it will explode instantly, it can only provide instantaneous explosive power, we can't control its burning speed, so it can't provide continuous thrust to send heavy objects or human bodies out of the land under our feet!

In addition, with Datang's current conditions, even if he sends a person out of the earth, there is no way to guarantee his survival in outer space! After all, there is air on Earth, but not elsewhere! ”

Li Zexuan explained in a language that Changle could understand as much as possible.

"Oh!"

Changle thought for a moment, and then nodded as if he didn't understand.

Li Er waved his hand and said: "Those who achieve great things are not informal!" If you kid has the ability to send someone to the moon, just send it, and as for whether that person can survive on the moon, you don't have to worry! ”

Lao Li always has an obsession in his heart, that is, heaven! Even if he doesn't go to it himself, the people under his rule can do it! This is something that the three emperors and five emperors, the Qin Emperor and the Han Wu can't do!

For this, make a small sacrifice, what can it be worth?

Li Zexuan rolled his eyes and didn't speak, he didn't bother to quarrel with Li Er about this matter!

The aerospace industry is such a sacred thing, even if Datang has the conditions to carry out manned spaceflight in the future, as long as he is there, he will not allow anyone to come nonsense!

Li Er knew what Li Zexuan was thinking at a glance, he shook his head, thinking that today was Chinese New Year's Eve, so he didn't blame it, but secretly said in his heart: This kid is still too kind!

.……………………

"Bang Bang Bang~!"

The sky of Yunshan is especially charming tonight!

After the students in the first class set off the fireworks, Li Zexuan let the remaining guards of the academy "go into battle together", before there were four sets of fireworks, and then more than a dozen fireworks pointed straight to the sky!

Colorful sparks fly up and down, blooming proudly in the air. Red, orange, yellow, green, blue, purple, all of them, decorate the night sky beautifully and gracefully, and illuminate the earth as if it were day. This is really a fire tree and silver flowers that never sleep, and fireworks fly to welcome the New Year!

The people on the cloud mountain and at the foot of the cloud mountain, from the fourth quarter to the present, the exclamation has never stopped, the vast majority of people, their eyes rarely blink, they have completely lost the beauty of fireworks to conquer!

But tonight's fireworks, the duration is unexpectedly long, a quarter of an hour, two quarters of an hour, three quarters of an hour, four quarters of an hour, the ugly bell has struck, but the fireworks on the cloud mountain have no intention of stopping, which makes everyone addicted at the same time, and sighs again and again, because the neck hurts!

In the end, many people simply get some hay and spread it on the ground to lie down on their backs, while the children of rich families or rich masters who have conditions are asked to get a mat or quilt and spread it on the roof of the carriage, and people will lie down directly, so that they can not only enjoy the fireworks in the sky, but also save worry and effort!

And Li Zexuan, after watching the fireworks for a quarter of an hour, took his daughter-in-law and Lao Li's family to the top floor of the tower on the left side of Guanghua Building, oh, to be precise, it should be Li Er who took him there, because the tenth floor of the tower on the left here is Li Er, the office of the dean of the academy, and the key is only available to Li Er, but Lao Li has never been here before, and today is the first time to come!

Entering this "dean's office", several people lay on the sofa, through the large floor-to-ceiling windows, you can see the fireworks over the playground while lying down, which is extremely comfortable!

At four o'clock, all the fireworks were released, Li Er stretched his waist, this Chinese New Year's Eve, he was very satisfied, and it could even be said that he was the most satisfied Chinese New Year's Eve in his life!

Comrade Lao Li was satisfied, of course he wanted to show his favor to the courtiers, I saw him stand up and say to Li Zexuan: "Tomorrow, oh, no, it's today, today's court meeting, I temporarily lift your grounding order, you kid remember to attend on time, if you are late or absent, hum~!" ”

After that, he took Changle, Changsun, Li Chengqian and others away, leaving Li Zexuan with a sluggish face!

"Damn! Thief God! What did the master do wrong? You're going to punish me like this? ”

For a long time, Li Zexuan pointed to the sky and scolded his mother.

Keeping vigil tonight, does he want to sleep in tomorrow morning? Still attending the pilgrimage? Participate in a hammer~!

That's right, Comrade Lao Li thinks this is a reward, but Comrade Xiao Li thinks it's a punishment!

.……………………

First update!

(End of chapter)