In addition to blacksmiths, stonemasons, and carpenters were not much better. They had drawings delivered every now and then. They felt relaxed at first, but later they became more and more complicated, which made them a little overwhelmed. In the past, several old craftsmen could easily complete the work at hand, but now they had to get together and each showed their own skills to communicate continuously.

At this time, Zhu Di, who had left the city, was excited and ran wildly on the official road. He rode a good horse under his seat, and his riding skills were amazing. Hao Fenglou was not strong enough, so he simply ignored him and slowly set off the horse and walked slowly at his own pace. However, several guards were red in their eyes and galloped to chase after him.

Zheng He couldn't bear it anymore, so he walked with Hao Fenglou and said, "Senior Brother, what are your Majesty going to see?"

Hao Fenglou didn't hide it from him. He knew that Zheng He was the confidant of Zhu Di. In history, Zheng He did participate in the investigation of Jianwen's whereabouts, but he could not tell it all, but said: "This matter is very important, and I don't want to say it explicitly, you will know it then."

Zheng He smiled slightly and said, "The master thought about moving to live with his senior brother in a few days. Our family is a eunuch and can only be in the palace and cannot serve his master. In the future, the senior brother will have to take more responsibility."

Hao Fenglou glanced at Zheng He and said, "Teacher...Brother..." When talking about his junior brother, Hao Fenglou always felt a little confused and was not used to saying, "My junior brother follows him day and night, I think it's very hard."

Zheng He smiled and said, "It's hard to do it. In fact, serving the emperor is like a boat ride. Going upstream is like an offense. But if you go downstream, you won't have much concern. Your Majesty is the master. What you think is different from others, and you can understand his temper. In fact, it's easier to get along with. The master said that the senior brother is a person with wisdom, and I think he can understand it more thoroughly than me."

Hao Fenglou looked at Zheng He deeply, as if he had some understanding, and couldn't help but smile: "Your Majesty has gone far, let's catch up."

Zheng He nodded.

The personalities of this pair of brothers are extremely extreme, one is still worthy, and the other is full of ghost ideas. However, there is one thing in common: they are all smart people.

Hao Fenglou and Zheng He caught up with Zhu Di. Zhu Di stopped his horse and stopped, his broad shoulders trembled slightly, and said, "It's a blessing that you are still young people, and you are not even as good as me."

Hao Fenglou smiled and said, "Your Majesty, I arrived at the camp one or two miles ago."

Zhu Di looked around with satisfaction. He couldn't help but nodded and said, "This place is good."

Walk further deeper, the outline of the camp will appear.

Zhu Zhiling saw the strange situation and confirmed that it was Hao Fenglou and Zhu Di who arrived. He hurriedly brought two trusted warriors to the ceremony.

Zhu Di looked at Zhu Zhiling with a smile and said, "Thank you for your hard work, don't be too polite. Let's take me to see you, don't reveal my identity."

The group got off the horse, because the strong men were running in a team and did not come back for a while. Zhu Di simply went to see the others. He first arrived at the settlement near the east. Seeing many blacksmiths burning furnaces and smelting iron, he asked Hao Fenglou with interest: "Why, Shenwuwei still wants to smelve iron by himself?"

It is actually okay to smelify iron, but the Ming Dynasty did not allow private forging of weapons, and most blacksmiths were craftsmen. Speaking of which, Shenwuwei was a bit of a taboo to raise blacksmiths without authorization.

Hao Fenglou said: "Your Majesty, the Shenwu Guard is no better than other ones. If the Ministry of War is asked to allocate weapons, it will be a pity. Furthermore, the weapons used by the Shenwu Guard must be different from other weapons, so the minister dared to raise some craftsmen and asked them to make some preparations for the future based on the characteristics of the Shenwu Guard."

Zhu Di was not guilty of his crime, but just laughed and said, "Do you still need special weapons?"

Hao Fenglou said: "That's true. After all, I don't expect the Shenwu Guard to charge into battle. Ordinary swords have no meaning to them, so I don't plan to give them a long blade. Instead, some weapons that are easy to hide are more suitable for them."

Zhu Dihe nodded and said, "That's right, that's the reason."

When the blacksmiths learned that the 'master' was coming, they came out to pay their respects one by one. Unexpectedly, Hao Fenglou's face did not look like a precious master, so everyone stepped forward together and saluted Zhu Di, saying in unison: "Go to Master."

Zhu Di was made of laughter and pointed at an old craftsman in the lead and said, "I am not your master either, your master is here."

The craftsmen were immediately embarrassed and had to salute Hao Fenglou.

Hao Fenglou was not polite and nodded, "I wonder if the drawings I handed over to you have been rushed to make them?"

The blacksmiths suddenly became embarrassed and looked at each other one by one. The old blacksmith smiled bitterly and said, "Old... Master, the little people have made several forgings, and although they have improved a lot, they are still..."

Hao Fenglou interrupted him and said, "What's the problem?"

The blacksmith replied: "The heat is insufficient and the impurities cannot be removed, so it cannot produce purer pig iron. Although it is forged into steel, it is inherently insufficient, so..."

Hao Fenglou smiled and said, "I had long expected that it was a matter of heat. In fact, the forging is the fundamental reason for smelting iron. Otherwise, no matter how good the skills are, it would be useless if there is no good iron. But the fundamental reason for smelting iron is the temperature. Whether the pig iron is good depends on whether the heat is sufficient, but why don't you use a bellows?"

The blacksmith said: "It's used, but it's still a little worse. It was made by those carpenters. It's really easy to use, but..."

Hao Fenglou said: "Take me to see the direction of the wind."

The blacksmiths led Hao Fenglou to the thatched cottage. Hao Fenglou saw a bellows placed in the furnace. The bellows were very old and made of wood and cowhide. Hao Fenglou squatted down and looked at it, then said, "Carpenters can improve the wind direction and increase the wind force. What do you use to make fire?"

The blacksmith said: "Of course it's charcoal, but to be honest, there is a saying in the villain that he doesn't know whether to say it or not. It's not easy to smelvet iron, and the cost is also huge. To refine one pound of iron, it not only requires ten pounds of iron, but also seven pounds of charcoal. It's a lot of money. Master, we have already ruined a lot of money."

Hao Fenglou smiled and suddenly realized a problem. In this era, iron is of high value. It takes not only a large amount of iron ore to cultivate a pound of iron, but also nearly ten kilograms of charcoal. To burn ten kilograms of charcoal, people also need to cut down trees and burn them into carbon. The manpower and material resources are not small.

It is precisely because the production of pig iron is not high and it consumes a lot of money that iron is not only an extremely important military resource, but also has become a circulating currency. The ability of iron to make money is also due to its value.

Hao Fenglou suddenly had a bold idea, what if he could reduce the cost of iron control a lot? Once he had this idea, Hao Fenglou finally realized what the advantage of time travelers is.

But he didn't show any expression, so there was no need to hurry at the moment, so let these craftsmen become more skillful.

When Hao Fenglou and the blacksmith had a conversation, Zhu Di, who was standing beside him, did not interrupt him. When Hao Fenglou came out of the hut, Zhu Di pursed his lips and smiled: "Why, are you interested in iron smelting?"

Hao Fenglou said: "It's not interesting. I'm idle anyway, so I'll ask them for advice occasionally."

Zhu Di couldn't help but sigh: "I don't like literati. Do you know why? They are too noble and always refuse to let go of their figure. However, you, a thousand households, discuss these with blacksmiths, would have lost your identity. I think you are so young and easy to take responsibility, and you have nothing to do with this."

Zhu Di had a deeper understanding of Hao Fenglou. A young man was always unexpected. In the past, Zhu Di always felt incredible, but now he was able to find that this guy was always unexpected. He thought that he was inseparable from these details of life in daily life.

Zhu Di said: "Do you want to make good iron?"

Hao Fenglou said: "Your Majesty, I heard that the Japanese are good at crafting swords. The swords made can blow hair and cut hair, so I want to try it too."

Zhu Di said: "If it is refined, remember to give it a good knife. What will we look at next?"

Then, Hao Fenglou took Zhu Di to the book office.

This book office is the largest building in the entire camp. In order to prevent moisture, some bricks and tiles were added one after another. When everyone went in, several book offices quickly stood up to greet the two of them. I thought someone had already informed them in advance, so this time there was no mistake about admitting the wrong owner.

Zhu Di walked forward with a smile and said, "You are sending documents, but you don't know what documents are sending?" He walked to a document, picked up a piece of letter, unceremoniously unfolded the letter, and soon, he was stunned.

Because there are only numbers in the letter, there are no Chinese characters at all. The whole letter is densely packed with them. The beginning is 5792 and then 7632. Zhu Di didn't even recognize any of these numbers, let alone the meaning behind the number.

Hao Fenglou hurriedly stepped forward and said, "This is a number invented by the Indians. I saw it as convenient, so I asked the clerks to learn it. Fortunately, it is very simple. 5 means 5, 1 means 1, which means you can become familiar with it in just a few days."

Zhu Di couldn't help but nodded: "It's really convenient. But, what does this five-seven nine-two mean?"

Hao Fenglou said: "This is a password."

Zhu Di became interested and said, "You continue talking."

Hao Fenglou said: "It's actually nothing to pass on official documents. However, Shenwuwei is different from other yamen. What I worry about most is that it is afraid of leaking news. If the official documents are passed on and intercepted, it is very likely to be completely exposed. However, in the future, a large number of people will definitely have a large number of documents to be sent out, so the minister thinks that a password must be set in the documents, and even if it is discovered and intercepted, it will be useless."

Zhu Di was confused: "Does these numbers be used as passwords? But how do people who receive the official documents know what the number means?"

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Chapter completed!