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After accompanying the Su sisters in the North Courtyard for a while, Cui Yingying also came over when she heard the news, and when she saw Su Mo'er, she was like seeing her own sisters, pulling Su Mo'er to keep asking for warmth, Su Mo'er was also smiling, and the two of them said that they would throw Li Su aside.

Li Su felt bored and left the North Courtyard, on the way he began to think about the problem of the army, he understood the principle of the gun out of power, but if it is peaceful today, the people are at peace, Li Shimin treats him well, he raises troops to rebel is not dead at all, and even if he raises the banner and arms the army, then the guns of these people may not be able to say who they will be, so Li Su's current strategy is to hug Li Shimin's thighs, in other words, it is good to coerce the Son of Heaven to order the princes, in this way, everything he does is justifiable, Especially when Li Shimin handed over the land of Shu to him, in addition to paying taxes to the imperial court, he was basically no different from the vassal king.

But people have no long way to have near worries, Li Su had to take precautions, the next thing he had to do was to master the army, in case of emergency, one is to guard against foreign races, and the other is to guard against the imperial court.

People's hearts are the most unpredictable, in case Li Shimin can't stand the pressure of the Shi clan one day, or has other changes and is forced to fight him in the same room, he will have to fight to the death at that time, after all, this is politics, and politics is never reasonable.

Speaking of armed armies, Li Yu did not give up the design and production of cold weapons in addition to the development of flint guns, for example, Taoyuan is now building swords made of stainless steel, as well as alloy armor doped with other metals, which can reduce the weight of armor while strengthening the strength of the armor.

Although the flint gun is a long-range weapon, it is still very weak in the face of the cavalry charge, after all, the tactics of cavalry impact infantry have been very effective in World War II, and in terms of range, the effective range of the initial flint is not high, and it is not even as good as the longbow that is thrown when dealing with the cavalry, but the advantage of the flint is that it is easy to train into an army, and the archer needs huge arm strength, and the bow and arrow troops cannot be trained in a few years, and the soldiers are consumables in the war, which is why the actual combat effect of the bow and arrow is greater than that of the flint, And after the flint was produced, the bow and arrow were completely eliminated.

However, this made Li Su think of a weapon that neutralizes the advantages of both - the compound bow.

This kind of modern bow and arrow can be pulled away lightly by using a pulley, and the power is also good, it can be said that it is not a little bit stronger than the bow and arrow of the Tang Dynasty, Li Su plans to produce this compound bow first to equip his army on the surface, and the flint gun developed and more advanced guns in the future should not be exposed to the world so quickly, and there is a priority to train an army in Taoyuan, and cultivate a group of people who can use guns.

In addition to the compound bow, Li Su also thought of the cross crossbow, a cold weapon, the range of the cross crossbow is not as good as the compound bow, but the advantage is that it is powerful at the same distance, killing people silently, and it is really a sharp weapon for special operations.

For these two weapons, the design drawings are already in Taoyuan, and the blacksmiths are studying them, and what Li Su needs to do is to purchase a batch of pulleys and bowstring materials, so that even if they are copied, the power will definitely not be as good as the original.

Of course, Li Su did not give up the flint, not only would he not give up, but also strengthened the range and power of the flint, after all, if there was really a large-scale war, he still had to rely on it to speed up the armed forces.

Su Moer and Tong Nian returned to Yizhou, Li Su specially bought a house for the two of them, that night, Su Moer took Su Xiaoyan to his house, and Cui Yingying also specially allocated a group of maids to Su Moer to take care of the living of the two.

The matter of the two was properly arranged, Li Su focused on Taoyuan, and the next day he went to Taoyuan with Jin Daqian and told Cui Yingying to stay there for a few days, the sooner these things can reach the production conditions, the better.

Li Yu wants to sit in Taoyuan for a few days, and Tong Yu is of course too late to be happy, so that some doubts in the research can be answered at any time.

When he arrived in Taoyuan, Li Su told him that Tong was coming, and this kid just said "um", and continued to discuss the matter of the cannon with him, if Tong Nian knew it, I don't know if he would slap this kid a few times.

After being entangled by Tong Yu for a while, Li Su went to the blacksmith shop, the head of the blacksmith shop is called Ou Yewang, claiming to be the descendant of Ou Yezi, Li Su is suspicious of this, there are too many people who pretend to be famous in this era, but this Ou Yewang's iron-striking technology is also good.

"How's it going? Is the bow tire of the compound bow made? "There was a heat wave in the blacksmith's shop, and the blacksmiths were banging and banging in it shirtless, and it was very noisy.

Li Su shouted a few times before Ou Yewang heard it, and he and Li Su walked out of the blacksmith shop, which was too noisy to hear.

"Back to Your Highness, I made it a few days ago!" Ou Yewang bowed and said, he went back to the house, and when he came out, he was holding a black bow tire in his hand, this bow tire is about one meter long, very simple, and there is no modern composite bow shrewd shape, Li Su does not pursue this, as long as it is practical.

The process of making bow tires is not complicated, Li Su nodded his satisfaction, and went to look at other cold weapons, and now there are many weapons in the house, swords and armor and the like.

Li Su walked over and picked up a one-meter-long stainless steel sword and said to the courtyard behind him, "You take this sword and try to fight him." He pointed to another nursing home.

"Yes, Your Highness!" The courtyard was a little excited, after being a soldier for such a long time, he could naturally tell the quality of the weapon, and the sword that Li Su handed him was not ordinary at first glance.

The weapons in the blacksmith shop were only created after the research institute moved to Taoyuan, so they are still used by anyone, so the swords of the guards are all the same weapons as before.

The one took the steel sword, and the other drew his own sword, the blade facing upwards in front of him.

"Boom ......" The sound of metal striking came, and the guardian holding the steel sword slashed hard, and then was shocked back by the force and took a step back.

Li Su walked over, the two of them were holding their swords to face Li Su, Li Su was looking forward to the scene of a sword cutting off a sword did not appear, the two swords struck each other, the blade of the stainless steel sword was only slightly white, and the other sword made of old steel was cut out of a gap of half centimeters.

The quality of the two swords was immediate, and Li Yu said: "You will distribute these swords to the guards later, remember to register and make a book, whoever loses a weapon will be punished, you know?" ”

"Yes, Your Highness!" The two of them said excitedly, these stainless steel swords are swords to them, they all rely on swords to eat, can they not be happy!

In the future, he will set up a special weapons depot in the barracks, and he will be responsible for recording the use of weapons on weekdays, so that it is clear at a glance who has lost their weapons and it is easier to track.