On the fourth day of October, there are still four days before Lu Chen's wedding, Yanmen is lively, a small number of guests have arrived, but most of the guests are still coming. It's a pity that Xu Shu and Zhuge didn't come in the end, and Sima Yi didn't plan to come, until the last moment, he persuaded the family to go to Yanmen.

The Sima family originally disdained Lu Chen's invitation, however, when Lu Chen printed and sent a set of ancient scrolls recited by Cai Zhaoji, they panicked. Everyone knew that the advent of printing would change the history of hand-copied books, thus leading to the rapid and unrestricted spread of knowledge, which would affect the interests of the family. So, here they are. After them, the families of Jingzhou, Runan, Guanzhong, Guandong and other places also began to go to Yanmen, with only one purpose - to prevent Lu Chen from flooding printing technology. They want to master the technology and limit it, just as they have mastered it for thousands of years but not passed it on to civilians in order to secure their position.

Outside the city of Mayi, the horse team of the Sima family stopped, even though they had received permission from Lu Chen's department to enter the city, but they did not enter the city immediately.

There was no one to greet them, and as a Hanoi clan, it was humiliating. But they stopped, not because of the humiliation, but because they chose to forget about it for the time being. The reason why I stopped was because I was surprised, or rather shocked.

They thought they had come to a city that did not belong to the earth. If it weren't for the two Han subordinates of "Ma Yi" on the city gate, they would probably think that they had come to the wrong enemy. It's not that the people of the Sima family haven't been to Mayi, but now they are in Mayi. But it is far from what it used to be. The city has not grown, but it has changed.

The city in front of you is a majestic city!

Outside the city of Mayi today, there is a cement avenue that stretches for dozens of miles, but this avenue is not used for commercial or official roads, but only connects Mayi and the iron smelting factory, cement factory, textile factory, coal mine, and iron mine outside the city. Iron ore is an abandoned iron ore found after half a month of excavation in the coal mine, which was originally difficult to excavate, but after being equipped with a crude steam engine, it is much simpler, due to the use of steam engines. Iron mines, coal mines, cement plants and iron-smelting plants have all increased their production speeds.

In just over a month. This cement road has been paved, and it has to be said that Chen Gong has a good schedule, on the other hand, the output of coal mines and the mass production of cement are also extremely important factors. In addition to the cement road. The original dilapidated Mayi city wall. Also refreshed. Today's Mayi city wall is ten feet high, which is not much better than the big city in the Central Plains. The most surprising thing is that in just one or two months. How could you collect and move so much stone and build such a high wall? Where does Ma Yi get so much glutinous rice bonding? In fact, it was not stone that built the city, but concrete blocks made of sand, gravel and cement with steel as the skeleton. This greatly reduces the cost of making the product, as well as the labor. In addition, the city of Mayi is not large, and the population that broke into Yanmen gradually increased, so this majestic city wall was soon built.

The most special thing is the tower and gate of Mayi City. The castle tower is not made of wood, but made of concrete and steel, and is tall and majestic. The city gates are two extremely heavy pure iron gates, and even the suspension bridge on the moat outside the city is made of iron.

On the city wall, there are iron-tired giant crossbows, and their defensive power can be imagined. In addition to this, there are several large iron pipes with black holes, which look strange, and many people don't know what this iron pipe is.

"This son is weird, you can't be reasonable!" Outside the city, Sima Yi, who was just twenty years old, sounded old-fashioned.

After sighing, Sima Yi finally led the team into Mayi City, and it was not the officials of Mayi who greeted him, but a greater shock. I saw that the original bluestone road in the city has been paved with a thick layer of cement, and every big street is a smooth cement road. The surrounding shops have also abandoned expensive and sturdy wooden buildings, and have begun to use cement and red bricks as the main material.

The whole of Mayi has been given a new look.

After coming to the Mayi Post House to accept the placement of the Mayi officials, Lu Chen still did not show up, and the high-ranking officials of the Mayi did not come to greet him, and the servants of the Sima family were already angry. But Sima Yi didn't get angry, but took a few entourages out of the post house and wandered around Mayi City, from the East Market to the West Market, and then to the most prosperous Horse Market in the north, Sima Yi frowned more and more.

In the north of the city, he finally saw the big iron pipe placed on the city gate, and finally understood the power of that iron pipe. Originally, outsiders were not allowed to visit the military center, but Sima Yi learned that the person in charge of the school was Pang Tong, although he had never seen Pang Tong, but he was also a big family, and there were some entanglements, so he sent a post. Soon, the tall and handsome Sima Yi was pulled into the school yard by an ugly Humpty Dumpty man, and then he saw the big iron pipe called artillery. According to Pang Tong, the previous artillery was fired with trebuchets, which was not small, but the range and accuracy were too poor, so after the improvement of Xiao Junhou, there was this kind of iron artillery. When Sima Yi came out of the school grounds, his steps were vague and his ears were buzzing, as if he was deaf. It was really the sound of the iron cannon that was louder than thunder, and the power was huge, and the picture of the abandoned city wall being destroyed by a cannon made him unforgettable for a long time.

In the end, Sima Yi also went to Yanmen Academy to meet Cai Zhaoji as an old man, as well as some of the children of the Cai family recruited by Cai Zhaoji. He saw the real "education without class", in the school, there are families from the south or the east, and there are also children from poor families from all over Yanmen. They were divided into three classes for high school and lower ages, and the textbooks were bound in paper threads, while the teacher taught with a blackboard and something called chalk made of limestone, which was simple and straightforward. The content of the lecture was even more surprising to Sima Yi, who not only studied the Four Books and Five Classics, but also learned mathematics, agriculture, astronomy, geography, and even mechanics and mechanics created by Lu Chen.

Late at night, Sima Yi returned to the post house, tossing and turning but unable to sleep, and finally, he turned over, let the servant hold the lamp, and began to write letters. The letter was addressed to his father, Sima Yi's father was Cao Cao's Jingzhao Yin Sima Fang, originally, the Sima family completely pressed the chips on Cao Cao, but now Sima Yi began to waver. He wanted to learn from the Xun family and bet on both sides, of course, these two sides were not Cao Cao and Yuan Shao, but Cao Cao and Lu Chen.

In Sima Yi's opinion, although Lu Chen has a small territory and a small population, his strength should not be underestimated. In just over half a year, the entire Yanmen is far ahead of the Central Plains in terms of military, culture and technology. He can imagine that in another three years, maybe a year or two, Yanmen will suddenly rise up and fight against Yuan Cao, although Lu Chen is now dormant, he is already a powerful force that cannot be ignored. And Lu Chen, who is only sixteen years old, is like a hero in the north! (To be continued......)