PS: Thank you for listening to Brother Fan's reward, otaku thank you!

Li Er was very happy to roll up Li Tai's picture scroll, took it and walked towards the main seat, and rubbed the back of Li Tai's head twice before leaving, making the little fat man also smirk.

Li Tai is followed by Li Kuan, he walked out of the pavilion after Li Tai 'rolled' to Li Chengqian's side, his steps were very big, and he stepped forward in three or two steps, which was a little less calm and solemn than Li Chengqian, but a little more wind and fire and pride.

"This is the second prince, and the sentence 'drunk and lying on the battlefield, don't laugh, and a few people will return to fight in ancient times' made countless generals as confidants. In the past few years, there has been less news about him, it seems that that poem is just a clever hand, and the various poetry clubs in Chang'an City have not seen his trace, now see what kind of congratulatory gift he will take out to congratulate His Majesty! An official whispered to a colleague next to him.

"I think most of them were taught, at that time, these two princes were still children, how could they write such heroic verses!" This one was obviously promoted from other places in the past few years, and he was still a little skeptical about the fact that the second son of King Qin's young poet was famous in Chang'an.

"Just look at it! Don't talk now! An old minister on the other side spoke out to stop the discussion between the two, this is the samurai Tong, this minister from the dragon is now the new emperor on the throne, I am afraid that the scenery will no longer be there. But he didn't care, he was just a lowly businessman back then, and now what is there to be dissatisfied with as a prince?

Although Li Kuan faintly heard some of it, practicing boxing made his six senses keen, and although the two ministers whispered, he also heard some of them. But now is not the time to think about these things, to go out into the field. Bow to Li Er and the eldest grandson: "Son-in-law congratulates my father on his ascension to the throne, I hope that my father will live a long life, and my mother will be young forever!" "Sycophants still have to be patted. Otherwise, Li Er will have a bad time.

"What is Kuan'er preparing this time?" Li Er asked, he had taken a lot of things from Li Kuan, so he added the word "this time".

"This congratulatory gift prepared by the child can only be exchanged if the father takes out most of the treasury!" Li Kuan said loudly.

As soon as these words fell, the ministers were terrified, what are these words? Is this for the emperor to use the money and silver in the treasury to buy? This is too much of a contrarian question! This is simply bold, and the congratulatory gift to the emperor has to be bought with two dollars?

"Bold!" Several ministers who were in a hurry had already jumped out and scolded Li Kuan. This kind of rebellious behavior as a good courtier of His Majesty will definitely fight to the end, even if the other party is the prince.

"Presumptuous! Father didn't speak, you actually jumped out. You have transgressed, two lords! Li Kuan suddenly scolded back.

"Kuan'er, since you say that, what the hell is it? Take it out and take a look! Li Er knew what Li Kuan's box contained. Li Er had one pair of those two things on his desk, but he didn't know how to use them.

"Father, please look!" Li Kuan opened the sandalwood box in his hand and took out a U-shaped piece of iron from inside.

Li Er's face showed such an expression, Li Kuan was busy in the blacksmith workshop in the city for this thing for almost half a month, Wang Hu, who was sent to him by Li Er, had already informed Li Er of his actions, although Li Er was surprised that Li Kuan could strike iron, but he was also interested in what he made, so the people who called the craftsman camp did the same.

"Father. This thing that Erchen took out was to save his father's army expenses, and it was not a loss at all to exchange half of the treasury for this! Li Kuan still talks about the treasury. He knew that the Zhenguan event had not yet come, the treasury of the Tang Dynasty was empty, and now the silver taels of the treasury were probably less than one million taels, and this half was only 500,000 taels of silver, if the horseshoe was popularized, those war horses would not be eliminated because of the rupture of the cuticle on the horse's hooves, and it would not take a few years to save 500,000 taels.

Li Kuan didn't mean to ask Li Er's money, he just wanted to highlight the importance of this thing, but he really worried a lot, if Li Er, who had been in charge of the army for many years, knew the magic of the horseshoe, how could he not know the benefits? So he was pretending to be smart, but because of this, Li Er felt that his second son was not so smart, and he was still under his control, and he was a little less suspicious of him, which was also an unexpected gain.

"Then tell me carefully, how is this thing worth half of my treasury?" Li Er asked quietly, but he was also a little shocked in his heart, because Li Kuan's unusual Li Er was very clear, and he always believed Tai Ban in his heart about what Li Kuan said, because Li Kuan rarely said big things in recent years, and what he said was not much worse. Now that this small iron bar is worth half of the national treasury, I am afraid that the effect will be very huge. I'm afraid it will be a great thing for Datang.

"This thing is called a horseshoe, as the name suggests, it is used on the horse's hooves, and now the biggest expense in the army is nothing else, it is the war horse! The price of the war horse is very expensive, because the land of Guanzhong does not produce horses, and can only sell horses from the grassland, and there is the largest enemy of the Tang Dynasty now, where the Turks, so the price of war horses remains high. However, by nailing it to a horse's hooves, you can make the most of the horses, even if they are all over the Thorns. Li Kuan introduced the effect of the horseshoe, Li Er's eyes became brighter and brighter as he listened, he unconsciously got up from his seat, came to Li Kuan in a few steps, and held Li Kuan's shoulders with both hands.

"Is this true? Is this true? Li Er's cultivation was actually excited by a few words, it can be seen how much Datang suffered on the war horse, every war is with the life of the warrior, the life of the war horse is fighting, the soldier died in battle, the horse leather shroud, but most of the war horses were killed by the soldiers in tears because the horse's hooves were broken and could no longer be used, the war horse is the second life of the knight, every cavalry, for the war horse is loved from the bottom of his heart, but because of the horse's hooves, kill their own mount, how cruel is it? It's better to stick a knife in the heart. Li Er had also killed his mount because of this, which is why he was so excited.

"Indeed it is! Although Erchen hasn't tried it yet, he has asked for advice from his predecessors, this is Erchen's first work, and the teacher gave the child a perfect evaluation. He also said that this thing will be passed down through the ages! Li Kuan was ashamed to hang the invention of the horseshoe on himself, anyway, no one knew if it was not, but this incident made him regret it later, which is not mentioned for the time being.

"Come on, go and bring my cloud-stepping black horse!" Li Er wanted to test it on the spot, and he couldn't wait to see it.

"Father, this occasion is not good! Besides, the boy has something else to come up with! Li Kuan reminded Li Erdao.

"This ......" Li Er looked around and felt that it was not very convenient: "Okay, let's go to the Eastern Suburbs Racecourse tomorrow, I want to try it myself!" Li Er gave the order.

"Your Ministers obey!" Countless ministers are scrambling to answer, they also want to witness the first realization of magical things, this is a moment to witness history, if there is really such a magical effect, then Datang will save a lot of money on war horses, it can be said that half of the treasury is really nothing.

"Kuan'er still has a congratulatory gift? Hurry up and let me see it! Li Er heard Li Kuan say that there was still a congratulatory gift, and hurriedly asked.

"This is also a little thing that Erchen came up with!" Li Kuan once again took out a small thing, this is a ring-shaped thing, but only half, a semicircle and a straight iron bar, very simple.

"What is this?" Li Er didn't have the slightest look of contempt this time, and asked solemnly.

"This thing is called a stirrup! This is something that the knight puts his feet in on horseback to make it easy to borrow! In this way, my Tang knights can also make cavalry shooting like Turkic cavalry! Li Kuan pointed out the function in two sentences, and Li Er immediately understood the function of this thing.

It is another thing to increase the combat effectiveness of the army, and after using this thing, my Tang cavalry will be able to compete with the Turkic cavalry. Li Er didn't get excited again this time, because it was enough to have the previous gaffe, and this time he accepted it lightly if he was mentally prepared. It's just that when he thinks of the effect that this thing will bring when it appears on the battlefield and fights the Turks in the future, Li Er is still excited.

For a long time, the war between the Tang Dynasty and the Turks, the Tang Dynasty is relying on the city to hold on, or send cavalry to raid, and the cavalry of the Tang Dynasty is always at a disadvantage when fighting the Turkic cavalry, because the Turks actually grew up on horseback, and the cavalry archery can be said to be deep into the bones, although the Tang soldiers are well-trained, they are bumped on horseback, and the legs are sandwiched between the horse's belly to shoot arrows, and the head is always deviated. It seems that Li Kuan said that he wanted most of the national treasury before, but it was not a big deal.

"This is amazing, with these two things, who can be in my Tang Army? Even if you fight to the edge of the sky, it is not impossible! As soon as these two small things appeared, the generals were excited, because they understood the true effect of these two small things, which was simply something that made the Datang Lion like a tiger.

"But anything else?" Li Er felt that Li Kuan was a treasure boy at the moment, and these good things were endless, I really didn't know what good things the scientist hadn't come up with!

"Father, the next thing is not a congratulatory gift from Erchen himself, it is sent by Erchen's master!" Li Kuan said that gadgets like horseshoes and stirrups can be said to be whimsical. I'm afraid that the others can't be explained clearly, so I'll use the invincible scientist to explain Li Er. I apologize in my heart to those crazy real scientists in later generations, you scientists who pursue the truth have become gods in Datang, and you can't explain anything, so you can help the master carry it! Who told the master to worship into your doorway!

"Oh! Your teacher also has a congratulatory gift? Li Er was a little surprised, the scientist was very mysterious, Li Er didn't find any clues, but this scientist seemed to know the world very well, which made Li Er feel a little frustrated in his heart, but he was quickly suppressed by him, and he made up his mind to see the true face of this scientist in his lifetime, and even control it! (To be continued......)