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"You don\'t understand, I have to do it, now the hands of the northern gentry are too long, if I don\'t show them some color, how can they stop." Then Li Yin talked about Lu Jin\'s matter. Tell it to Cui Yingying.

After listening, Cui Yingying sighed, this Lu family and Cui family are still in-laws, let alone other noble families, thinking of this, Cui Yingying felt sad, "Yingying is just a little worried, father can still protect His Highness now, but if that day The royal father has passed away, what should the nobles unite do to attack His Highness?"

"Hmph, if there is a day, they will have to have a good set of teeth to bite me." Li Yin said disdainfully, and then comforted him: "I have my own measure, and I won\'t get into too much trouble with them. "

Li Yin\'s words are just to comfort Cui Yingying, he understands that with technology beyond the times, he will never be able to coexist peacefully with those gentry families, and everyone knows what will happen to a pack of wolves facing a fat sheep. The meat on his body is cut off to feed the wolves, but there will always be a day when the cutting is over. Li Yin is now this sheep. His technology is destined to attract the attention of the elites of the gentry in this era. It’s not about squeezing everything that can be squeezed to strengthen ourselves. How can they not feel itchy and uncomfortable when facing Li Yin now, so Li Yin will not give up what he has in his hands with a smile on his face, he is at a disadvantage , and let them have the same technology as themselves, will Li Yin still have a way to survive?

   Cui Yingying felt at ease when she heard the words, she would be nothing more than an ordinary woman, but she is the princess of Shu, so she had to think about Li Yin.

  The two returned to Yizhou City, Cui Yingying went back to the mansion first, and Li Yin went to Taoyuan, which was what he cared most about.

Today, a fortress has been built at the entrance and exit of Taoyuan. This fortress is similar to a medieval castle. An arrow tower, each guarded by four archers.

"Your Highness, there are secret sentries within a radius of ten miles of the entrance. Once anyone comes in, they will be expelled immediately. The name is that there is a limestone mine here. Do you think this is okay?" Li Yin and Jin Daqian stood at the bottom of the fort, Jin Daqian report.

  Li Yan looked at the slaves who came in and out, and said: "That\'s right, there are still these slaves who must keep an eye on them, and what happened last time can\'t happen again."

   "Yes, Your Highness!" Jin Daqian had a dull pain in his buttocks, but this time he remembered, "The old slave has already ordered that if he finds the escaped servants, he will be executed immediately."

Li Yin nodded. The escaped slaves are only a very small number. Under Li Yin\'s hands, they can eat enough, wear warm clothes, marry wives and have children, which is much better than before. So far, there has been only one incident of slaves escaping. , this was premeditated by Lu Jin.

  Looking outside for a while, Li Yin walked in through the five-meter-high city gate. The Taoyuan was more than 20 miles long, and its size was comparable to Chang\'an City. From now on, this will be Li Yin\'s secret industry and military base.

After entering the cave, the sound of metal hitting rocks can be heard continuously. The cave used to be only two meters wide and three meters high. It was very difficult to transport some larger objects. Now Li Yin ordered the cave to be expanded to five meters high. Meter wide, so that large equipment can come in and out in the future.

After the transfer of the research institute, all the personnel and equipment have now arrived in Taoyuan, but the construction of the new research institute will take some time, so Tong Yu took the craftsmen to temporarily live in a deserted small village to continue research. These farmhouses can be repaired. barely live.

When he arrived in the valley, Li Yin raised his eyes and saw that there were busy servants everywhere, those who transported cement bricks and tiles, and those who carried wood. Li Yin\'s goal was to make the construction here a little more modern, so the cement bricks here More tiles are used, and there are fewer wooden houses. What he is afraid of is that the guy from the research institute will accidentally burn down the house.

  Through the peach grove, Li Yin and Jin Daqian arrived at the small village, where it was more lively, with people coming and going, several clay blast furnaces had been built and were smoking, and some blacksmiths were beating and casting weapons.

   Tong Yu and Du Pingzhi were standing in the middle of the road, surrounded by a circle of people, very noisy, Jin Daqian wanted to report, but Li Yin stopped him so as not to disturb their train of thought.

Li Yin turned around and continued to walk south. The research institute has basically taken shape. Hundreds of workers are laying bricks and plastering cement. The structure here is similar to that of the previous research institute. The Institute was separated, but a small village was built separately for them to live in, and it became a place for pure research and experimentation.

Opposite the research institute is the military camp, which can be seen by turning over a hill with a height of more than ten meters. This military camp is completely built according to the modern military camp. At present, the concrete floor is being laid, and a playground is also under construction. In a few days, Li He is planning to go to Hyundai to purchase some sports equipment, such as horizontal bars, parallel bars, and split horses. He also plans to set up football fields and basketball courts on the playground. The life of a soldier is boring, and leisure training must be balanced.

Just as Li Yin was thinking, a servant who was pushing a cart fell to the ground suddenly, and the wooden trolley fell to pieces. He shook his head and looked at the other servants who were transporting. The tools they used were basically wooden. Small cart, the wheels of this cart are made of wood and are very easy to damage.

When Li Yin was in school, he practiced at a construction site. He remembered that there was a very simple short-distance transportation tool on the construction site. Putting bricks, cement and other things is very practical, and the small carts here are flat plates on wheels, and they tend to fall off when pushing things, so why not buy some and put them here.

In addition to this, Li Yin also thought of a primitive transportation tool, the human-powered tricycle. This thing is so suitable to bring here. Not to mention easy to use, the key is durability, practicality, and easy maintenance. It’s not that he doesn’t want to buy some modern transportation. Vehicles, the key is not the problem of mass purchases, the problem is the follow-up oil burning and maintenance problems, these machines have a small problem in three days, and a big problem in ten days, and it may not take long for them all to lie down.

Now that the four walking tractors have given him a deep understanding, it is still necessary to develop local industries so that the machines produced can be maintained in a timely manner. Therefore, Li Yin currently focuses on human transportation and animal power, and purchases some necessary machinery in small quantities. , It is enough to reach the country\'s rural transportation level in the 1970s and 1980s. As for the future, we will move forward step by step to steam engines, internal combustion engines and other power equipment. Scientific research is a matter of years and years, and it cannot be accomplished overnight.

   Having made up his mind, Li Yin came down from the hill and returned the same way. When he passed the village, he bumped into Tong Yu. Tong Yu was about to salute, and shouted, "Your Highness!"

  Li Yin was thinking about shopping, so he waved his hand casually and said, "No need to salute, go and do your work!"

   Tong Yu was stunned for a moment, and quickly chased a few steps forward: "Your Highness, Tong Yu has something important to report."

"What\'s up?"

   Tong Yu hesitated for a moment and said, "Your Highness, please follow me."

Seeing Tong Yu\'s mysterious look, Li Yin followed him to an open place outside the village, where a group of people were surrounded, and from a distance, Li Yin saw Du Zhiping and Guo Xianyuan leading a group of people together .

   Tong Yu led Li Yin to the front, he said: "Get out of the way, Your Highness is here."

Hearing that the group dispersed immediately, Du Zhiping and Guo Xianyuan walked over and saluted, and then stepped aside. Li Yin saw clearly what the crowd was surrounding just now, it was a cylindrical metal The object, at this time resting on a wooden board.

Tong Yu walked up to the object and said, "Your Highness, we are studying the flintlock gun you brought, but we thought that the thicker the barrel of this gun, the more gunpowder it contains, the more powerful it will be. ? So I made this, I wanted to invite His Highness, but I just happened to meet His Highness."

Li Yin circled around the object, and finally realized that this crudely made iron pipe is the embryonic form of artillery in history, but the appearance is too ugly, not to mention the thickness of the pipe wall of the steel pipe is not the same, and the surface is also pockmarked Similarly, Li Yin was convinced. They turned cannons into guns, and these guys turned guns into cannons. But it’s okay, this cannon will have to be developed sooner or later. "Have you tried it? How powerful is it?"

   Li Yan\'s calm expression made Tong Yu not calm. Could it be that His Highness has seen this before, he said, "I tried it once, and I think it\'s okay?" Tong Yu\'s tone was a little uncertain.

   "Ignite the fire and let me see how powerful it is?" Li Yin\'s understanding of Tong Yu\'s okay is extremely poor, after all, they have never seen a real artillery.

Tong Yu answered yes, and ordered a few people, who immediately began to pour gunpowder into the barrel, and then began to stuff all kinds of gravel into it. When Li Yin saw this, he was desperate. This is really the most primitive artillery. .

   There is a small round hole at the bottom of the cannon. Tong Yu wrapped some gunpowder in paper, rolled it into a cylindrical shape and stuffed it in. He said to Li Yin: "Your Highness, please cover your ears."

  Li Yan not only covered his ears, but also walked a long way. He really didn\'t have confidence. If this thing exploded, it would be dangerous. He said: "Stay away from the fire."

   "It\'s okay, Your Highness, I\'ve tried it several times." Tong Yu was quite confident at this time, and said to a craftsman, "Light it up."

Hearing this, the craftsman took a torch and lit the fuse. Li Yin saw the fuse burning rapidly, and then there was a "boom", and several pieces of rubble flew out of the gun barrel in Li Yin\'s field of vision, landing at different distances. Similarly, the farthest one flew about 30 meters and landed.

  Jin Daqian was taken aback and almost stopped. The sound was too loud. Li Yin sighed. It is okay to take out this cannon to scare people, but it is very rare for them to think and develop it by themselves in this era.

   "Papa papa!" Li Yin applauded, "Very good!"

   Tong Yu showed joy, "Thank you, Your Highness, for your appreciation."

"However, this kind of thing already exists in the information I gave you. It is called artillery. For this kind of artillery, the barrel must be longer, and the front of the barrel must be thinner and the back must be thicker, because gunpowder When the explosion occurs, the pressure at the bottom is the highest." Li Yin explained.

  Tong Yu\'s ominous premonition has been tested, and Li Yin has seen this kind of thing, but he then listened to Li Yin\'s talk about the production method of the artillery with great interest.

"As for the production of this gun barrel, you go back and tell the blacksmith to make a mold out of yellow mud, and then pour molten steel into the mold..." Li Yin said, and Tong Yu and others walked to Tong Yu\'s temporary laboratory. In the room, Li Yin told Tong Yu how to make the mold, and asked Du Zhiping to report the artillery materials in the reference room.

  Du Zhiping answered yes, then ran out, and came in with a push of materials after a while.

Li Yin took over the documents, rummaged through them, and took out the design drawings of the red cannon. This is simple enough. There are everything in the production process. Li Yin opened the documents and asked Guo Xianyuan, Du Zhiping and Tong Yu Come over and tell them the making and principle of the red cannon.