(Thank you for your support if you show the recommendation fifty tomorrow, if you continue to update the third update, someone misunderstood. In fact, I rewarded the hundred rewards myself. I want to rank hehe!)

Li Shimin had a murderous intention to kill Tuyuhun, so he had to move troops. If he wanted to move troops, Ma Zheng of the Tang Dynasty was an unavoidable topic.

Because the Ma Zheng in the Tang Dynasty was strange.

The Tang Dynasty did not lack horses because there was a tribe who had always been providing horses to the Tang Dynasty, but this tribe sold horses with silk, and the cost of horses was too high. Although the Tang Dynasty was rich, it could not afford it.

As we all know, war is the most exhausting thing. After a war, the loss of horses is astronomical.

Li Shimin wanted to fight Tuyuhun, but Li Shimin was the saint. He could not simply consider his own preferences, but also think about the people. After he expressed his thoughts of attacking Tuyuhun in the court.

The generals all agreed.

Cheng Yaojin, Li Jing, Yuchi Gong and many other famous generals rushed to join the war.

However, all the military generals raised their hands to agree, but all the civil officials opposed it. Fang Xuanling and Wei Zheng, led by these people, analyzed the adverse factors of the Tang Dynasty's war at this time.

It was just the ninth year of Zhenguan at this time. If there was too much loss, it would affect the fate of the Tang Dynasty. The most prominent one was the loss of horses, which would cause the Tang Dynasty economy to fall into a swamp and unable to extricate itself.

It would be fine if Li Shimin was a foolish monarch, but Li Shimin was a hero, so he had to consider the questions raised by civil officials.

As the saying goes, there is thoughts on the day and at night, Li Shimin really wants to solve the problem of Ma Zheng, and later he will give his sons a question about Ma Zheng.

It’s just a pity that the issue of Ma Zheng was not solved by the civil and military officials in the court, let alone a few young men who had not yet grown up. Li Shimin was helpless and had a breath in his heart. In order to exert his anger, Li Chengqian became a punching bag. In fact, Li Chengqian was still very unlucky.

Looking at the pitiful and helpless Li Chengqian in front of him, Li Zhan really wanted to help him, but he didn't know what was wrong. When he was with this prince of the Tang Dynasty, Li Zhan always felt that blood was thicker than water. This feeling was stronger than being with his own brother and sister, and it was very strange.

"Don't feel wronged."

Li Zhan smiled and said to Li Chengqian: "Brother teaches you a method. After you go back, you will tell your father about this method, and your father will definitely praise you."

"How is this possible? Brother, you don't know. My father is very partial. He only likes the third and fourth brothers. My eldest son is his shame."

A slight smile, Li Zhan said: "Don't worry, others will lie to you, I won't lie to you, I won't write the horse policy theory, but I can know that your father asked you to write the horse policy theory, which should be targeted at the court's war horse loss, and I want you to find a way for the country.

Although my method is not very literary, because I have never been to school for your elder brother, if your family offers it, you should receive rewards from the court.”

"What's the way for brother?" Li Chengqian finally became interested.

Li Zhan took out a piece of paper and smiled and said, "Wait!"

Then, Li Zhan vividly drew stirrups, saddles and horseshoes on the paper.

Here we need to explain that stirrups, saddles and horseshoes actually appeared a long time ago. There is a "nail horseshoe picture" in the murals of Mogao Grottoes in Dunhuang, China, which was built on the wall of Cave 302 built in the 4th year of Kaihuang in the Sui Dynasty (584 AD).

From the picture, a horse is standing, tied to a tree, and a man stands behind it, holding the right hind limb of the horse in his hand, turning the hooves upwards, and an oval hoof is painted on the hoof, which looks like a palm is about to be released. This is enough to prove that the horseshoe has appeared before the Sui Dynasty.

However, the appearance of the past does not mean popularization, because in ancient times, the spread of this kind of news was very closed, and many people's life range would not exceed one hundred miles, so things that are too far away generally cannot be transmitted.

From the Qin and Han Dynasties to the Tang and Song Dynasties, no horseshoe, or horseshoe, has been found in the Central Plains. Only in the relatively remote Northeast region, have been discovered, and it is not too late.

Archaeologists discovered physical materials clearly as hoofs in the remains of the Goguryeo era in the three northeastern provinces, which were from the 3rd to 6th centuries AD. It was discovered in the famous Goguryeo King's Tomb. The tomb was exact in 414 AD.

The purpose of saying this is to tell everyone that appearance does not mean popularity. As long as it is not popularized, Li Zhanxian can do it.

"Brother, what are these?" Li Chengqian asked in surprise when he looked at the three strange things drawn by Li Zhan.

"One of these three items can reduce the loss of war horses, and two items that enhance the power of cavalry. Don't worry, brother will tell you one by one."

After saying that, Li Zhan pointed to the horseshoe iron: "This U-shaped item is made of iron, called horseshoe iron.

You and I know that the horse's hooves are composed of two layers. One layer that comes into contact with the ground is a hard keratin about 2-3 cm thick, and the other layer above is a living keratin. When the horse's hooves come into contact with the ground, they will fall off quickly due to friction from the ground and corrosion by the accumulated water.

But when we nail the horse's sock, it is equivalent to putting an iron shoe on the horse.

Not only does it protect the horse's hooves, but it also makes the horse's hooves hold the ground more firmly, which is very beneficial for riding and driving.

I calculated that this can reduce the loss of war horses in the Tang Dynasty by 80%. If there are one million war horses in the Tang Dynasty now, then the horseshoe can increase the war horses in the Tang Dynasty by several times. This is definitely an unparalleled achievement."

"Brother, you think of this?" Li Chengqian looked at Li Zhan in front of him in a daze, and felt almost shocked.

However, Li Zhan smiled and shook his head and said, "No, it was not what I thought of, it was what you, Chen Qian. Remember to leave this door, horseshoe is your thing. It has nothing to do with me, it has nothing to do with you."

"Brother, how can you be so nice to me? You must know that if you offered this horseshoe, you will at least get a title." Li Chengqian looked at Li Zhan in front of him in a bit incredible. He wanted to know why Li Zhan was so nice to him, but Li Chengqian could not guess at all. At this time, Li Chengqian even thought that Li Zhan had any bad intentions for him, because it was too unreal.

Li Zhan can actually see Li Chengqian's surprise. It is indeed very alert. Who would be so kind to someone who has only met twice? So Li Zhan looked at Li Chengqian calmly and said, "I don't care what you think, I just want to tell you that your elder brother didn't call you in vain. I already regard you as my younger brother, so I will do my best to help you.

If you think I have any intentions, you can leave!"

Without hesitation for a few seconds, Li Chengqian nodded firmly and said, "Brother, I'm sorry!" Following Li Chengqian's eyes, he said sincerely: "I believe that Big Brother will not lie to me, my brother will always be nice to me."

This sentence seems to be said to Li Zhan, or to himself.

He was still confused just now, but now he changed his doubts because of a sentence. Li Chengqian also had a strange sense of trust and dependence on Li Zhan.

Li Zhan laughed: "Okay, I'll continue to tell you the function of the combination of saddle and stirrup. After that, they are your idea. After you go home, immediately find a blacksmith to create it secretly.

Follow you to find a good opportunity to give these three harnesses to your father. I believe your father will definitely praise you."

"Well, brother, I'll listen to you!" Li Chengqian nodded happily.

Li Zhan laughed
Chapter completed!