I make a popular science video and all the emperors learn from it!

Qin Dynasty.

What does Daqin Heavy Industries, the world's first assembly line...

Ying Zheng was not interested in the slightest.

He could only know one thing now.

Why did Great Qin fall so quickly!?

Who is it?

Who made the iron-blooded Great Qin that he single-handedly forged die in less than 20 years?

Ying Zheng was anxious like an ant on a hot pot.

He looked at Fusu on the side.

Could it be Fusu?

"Yes, this son is pedantic and unfit to be an emperor!"

But even so, it was impossible for the huge Qin Dynasty to fall so quickly.

Fusu is useless alone.

You can't use the officials under your command.

The two brothers, Meng Tian and Meng Yi, are completely the pillars of Great Qin, with these two people, what enemy can break through Great Qin!

Noticing Ying Zheng's glance, disappointed gaze.

Fusu bowed his head in shame.

On the other hand, the other princes tried their best to attract attention one by one.

Childe's high expression is ecstatic: This prince's chance has come!

Fusu, he was finally disgusted by his father!

Haha, Fusu, also today.

Hu Hai was even more exaggerated, standing on tiptoe with a small expression of excitement on his face.

Look at me, look at me!

Father looks at me...

Ying Zheng turned his face directly, and all these princes were not angry.

Don't look at it!

Wait, since there will be no major events in country 877.

The problem is abroad.

Invasion by foreign enemies?

The only people who can be called enemies of the Qin State are the steppe people.

Xiongnu, Hu people.

Ying Zheng's eyes froze, and he muttered, "It must be a foreign invasion!"

[Not surprised, not surprised. 】

【Rush to answer the question!】

[May I ask when the Qin Dynasty was established and what year was it when it fell?]

[Option 1: 221 B.C., 206 B.C.]

[Option 2: 222 BC, 206 BC]

[Option 3: 220 BC, 208 BC]

[Option 4: 221 B.C., 207 B.C.]

Yingzheng has bloodshot eyes!

This... What is the difference between this and sprinkling salt on his wounds!

Murder and heartbreaking!

"Option four!"

Ying Zheng almost shouted out, and he may not be able to forget these two strings of numbers in his life.

[Correct answer!]

[Congratulations to the Qin Dynasty for the success of the answer. 】

[Obtained: Improved iron smelting technology, manufacturing process drawings of stirrup horseshoe.] 】

The next second.

A (BJBE) book and two drawings appeared in his hands.

Sadness never goes away, it just transfers to other people.

Yingzheng decided to let the grassland people experience their pain!

He hurriedly looked at the two drawings in his hand.

【Stirrup:】

[It is a pair of pedals hung on both sides of the saddle for the rider to use when getting on the horse and riding the horse to step on the horse.] 】

[The role of stirrups: not only can help people get on the horse, but more importantly, it is to support the rider's feet when riding, so as to maximize the advantages of riding, and at the same time effectively protect the safety of the rider. 】

【Horseshoe:】

[Also known as horseshoe, it is an iron hoof-shaped object nailed to the hooves of horses, mules and other livestock. 】

[The horse's hooves are made up of two layers, the one that touches the ground is a layer of hard keratin about 2-3 cm thick, and the upper layer is a living keratin. 】

[The horse's hooves are in contact with the ground, and they will fall off quickly due to the friction of the ground and the corrosion of the water. 】

[The use of horseshoes: not only can protect the horse's hooves, but also make the horse's hooves more solid to grasp the ground, which is very beneficial to riding and driving. 】

"It's so amazing. (If you read a violent novel, go to Feilu Novel Network!)

Ying Zheng took a deep breath.

After reading the introduction, he already knew the role of these two things.

In short, on the battlefield, the former increases the combat effectiveness of the soldiers, and the latter allows the horses to run farther.

Another book is even more interesting.

It is iron-smelting technology. []

The reason why Great Qin used a large number of bronzes was not because there was no iron to use, but because of the backward iron-smelting technology.

Now, it just makes up for that.

"Well, God helps. Ying Zheng waved his hand and immediately ordered: "Gather the people of the Mo family into the palace and build stirrups and horseshoes for the widows." "

Didn't wait long.

Everyone from the Mo family arrived.

After seeing the iron-smelting technology, everyone was very excited.

They have been struggling with how to make iron efficiently lately, but now they have been solved by His Majesty!

"Your Majesty, rest assured, I will be able to create this stirrup and horseshoe in one day, and I guarantee that each one is exactly the same and can be used directly. "

Get the promise of the Mo family.

Ying Zheng can only wait patiently.

I only waited for half a day.

The stirrups and horseshoes were delivered to him.

Ying Zheng looked at the two strangely shaped things, and ordered to his side: "Bring a war horse." "

Not for a while.

A majestic war horse was pulled out of the hall.

And on it, stirrups and horseshoes have been loaded.

"You wait to protect Your Majesty, and I'll try it myself. Meng Tian stepped out of the column and commanded thousands of soldiers.

"No!"

Thousands of voices frightened the war horse into stepping on the spot, as if trying to escape.

Meng Tian came to the side of the war horse and gently stroked it to comfort the frightened horse.

Then he looked at the stirrups.

The whole resembles a ring, with a circle at the top and a flat at the bottom.

Just enough to put down one foot.

Putting his foot on the stirrup, he threw himself on the horse with a little force.

"Good stuff!"

As soon as I got on the horse.

Meng Tian immediately felt the beauty of this thing.

Indeed, with this thing, it is very easy to get on and off the horse.

He even doubted that even a woman could easily get on a horse without training.

And there is a place to put your feet.

Horseback riding won't be so tiring anymore.

Before, the two legs were shrugged, and once the horse was ridden for a long time, when the horse was dismounted, the two legs barely felt anything.

"Drive!"

The horse's hooves made a crisp clatter on the ground.

Meng Tian knew very well what this sound was.

The sound of iron colliding.

He didn't quite understand how iron tools were attached to horses' feet.

It's like people wearing shoes.

But one thing is certain, a war horse wearing iron shoes will definitely be able to run farther.

Moreover, once the war horse runs on the way, stepping on the enemy...

He didn't dare to imagine how miserable the enemy who was trampled on was.

Ride a horse and walk around the main hall twice.

Meng Tian discovered something that surprised him even more.

He seemed to be able to stand up on his horse and fire crossbow arrows at the enemy!?

"Meng Aiqing, what's wrong?"

Ying Zheng was anxious to see it, and asked directly. .....。