The business that Zhu Su said was undoubtedly glass-burning. It was not until Zheng He returned from the West decades later that Fang mastered the technique of glass-burning through the Western craftsmen brought back by Zheng He. If you take out the glass at this time, then you won't make a lot of money?

Among the key to making a fortune through the traverser, this glass making is undoubtedly one of the highest. It burns sand that doesn't cost money, and the glass products that are burned can be sold for gold. Now there is a shortage of money, and there is a need for such a quick business.

The wounded soldiers soon came, and to Zhu Su's surprise, there were few who were willing to learn the craft of glassmaking from Zhu Su. They are originally military households, and the matter of burning glass is the work of craftsmen, which military household is willing to be a craftsman who is willing to degenerate?

In the end, only 15 disabled veterans and their families were willing to help Zhu Su with the glass-burning business. Most of these people are still because they have injured their hands and feet, they can't go to the land to farm, or because they have sold their fields early because of livelihood reasons, and they can't replace the new fields when they move over. This once again made Zhu Su realize the low status of the craftsman in the hearts of thousands of Chinese people.

Although there are a few craftsmen arranged by Lao Zhu in Zhuangzi, they are all responsible for steelmaking and cement burning. There are few people, but they all sign death deeds, and their families have also moved here with Zhu Su, in order to keep it secret. Since you want to keep it secret, there is naturally no way to choose as many as possible, so Zhu Su, the "side business" of burning glass, has to cultivate people by himself.

Unexpectedly, I rushed to send those veteran military households a meal, and people were not uncommon to ask for it, so they would rather farm as a military household.

And that's not all. There was another problem with the furnace. Because the temperature of the steelmaking furnace was too high, the craftsman thought that he had nothing to do and did not relieve the pressure in time, resulting in the overflow of molten iron and the destruction of a furnace. Zhu Su couldn't care about his tiredness during the morning exercise and Li Wenzhong hurried to see it, but fortunately no one died because of it.

However, someone was seriously injured because of this, and the craftsman who was confident that he did not take Zhu Su's instructions to heart was almost directly killed by Li Wenzhong, if Zhu Su hadn't stopped Zhuangzi, the first murder would have occurred.

Looking at the craftsmen wailing on the ground and the other craftsmen with frightened faces, Zhu Su couldn't help but sigh deeply in his heart: these people have no relevant knowledge, they can't listen to other people's words, and they always hold on to the craftsmanship passed down from their ancestors and refuse to change easily. I'm afraid that in my heart, I just take my instructions as a child's naughty smile. It's not realistic to rely on them to make technological leaps.

I need people who really understand technology. And such a person has only half of himself in this era...... Not even one, because I always only know a little about it.

We need to cultivate people who can lead to technological progress......

But it's already here, and it's going to be on anyway. On this day, Zhu Su squatted together with a group of veterans and their families who were willing to burn glass, and explained to them in detail the method of burning glass: "The point of burning this sand into glass is not on the sand, but on the ashes of the grass and trees!" As he spoke, he pointed to the black things on the side.

When sand is fired into glass, it needs to reach a melting point of 1,700 degrees. At this time, the temperature of the kiln is far from reaching this height, so it is necessary to find ways to reduce the melting point of the sand. In Germany in the 16th century, it was discovered that the use of potassium carbonate was effective in lowering the melting point of sand. The easiest way to obtain potassium carbonate is to extract it from plant ash.

There was no way to say what temperature, Zhu Su could only break up the steps of how to extract the ashes and how to burn them, and tell these novice craftsmen. A few days later, a lame veteran named Lao Zhuang succeeded in burning the glass solution.

These people are more suitable than the craftsmen transferred by the Ministry of Industry, which Zhu Su did not expect. However, the steps of firing glass are indeed easier than others, mainly because the material is unpredictable, and there is no difficulty to put it bluntly. Zhu Su asked the fifteen people and their families to start with the simplest mirrors and prisms, and slowly study the practice of blowing glass and glassware. Only then did Zhu Su leave the glass kiln with confidence.

Before he had time to change into a dusty outfit, Xiang Deng came in with a sneaky look: "Your Highness, Wei Guogong is here with the little grandfather and the sour ding." ”

"Oh?" Zhu Su's spirits lifted. Xu Da is here? The little grandfather is undoubtedly Xu Yungong, and the sour Ding must be Fang Xiaoru. Put on the robe and face didn't have time to wash and hurriedly greeted him, and he saw Li Wenzhong and Xu Da, who was dressed in casual clothes, chatting happily in the school field.

"Wei Guogong has come from afar, and it is really rude for the younger generation." Lao Yuan Zhu Su said loudly as he walked. When facing Xu Da, Zhu Su always had a feeling that his actions were completely mastered, unlike Lao Zhu's absolute coercion like a mountain, Xu Da gave him the feeling that it was as unpredictable as a ball of water. The so-called impermanence of water and impermanence, although Xu Da was extremely kind and humble to himself, Zhu Su always instinctively did not dare to be rude to him.

"His Royal Highness is serious. It would have been rude for me to make a hasty visit. How dare you work again to welcome His Highness? Xu Da's smiling appearance and a casual clothes are like an ordinary uncle who comes to visit relatives in the next village, only those bright and amazing eyes make people know at a glance that this person is extraordinary.

Before Zhu Su could be polite again, Xu Da pointed to Wu Wangwei in training with surprise on his face: "I can't imagine that in addition to being proficient in arithmetic, His Royal Highness also knows this kind of body refining and military training." In my opinion, although there are only more than 20 young people, their orders and prohibitions are the same, and their prestige and momentum are no longer below the hundreds of thousands. It only takes blood and fire to become an elite soldier. If you break up the army, you can pull up an army of tens of thousands in an instant......"

"Xu Shuai, these people are not just forbidden by order." Li Wenzhong's words revealed a taste of proud show-off. "They climb mountains and forests, lurk and spy are also good at it."

"They are all good seedlings, and in time, they will surely become braver soldiers than their father and brother who sacrificed!"

"Oh?" Xu Da said in surprise. I couldn't help but turn my eyes and look at Zhu Su a few more times. When he first hit the third stage, he thought that this fifth prince might have the talent to lead the army. Now that it is discovered that this prince has actually figured out such a wonderful skill of military training, even he, a veteran soldier, can't help but be amazed.

After returning from the Northern Expedition, he thought that he had no possibility of going out on the battlefield again. He has already reached the point where his merits are difficult to appreciate, and at first, His Majesty was bent on destroying Meng Yuan in one fell swoop, so he gritted his teeth and still used his highest prestige in the army to lead the army. Now that the government and the opposition have agreed to the national policy of a temporary stalemate with Meng Yuan, then he, the Duke of Wei, has no place to play. His Majesty will not give him another chance to make meritorious contributions.

Although Xu Da came from a humble background, he had read history. The fate of Liu Bang's brothers is clearly engraved on the history, how can he not be afraid?

But the enthusiasm that was looking forward to chasing Mengyuan in the north was not cold after all. Just let him die under Lin Quan, and he is not willing. Now the only hope is that Da Ming can have a few more young warriors, who can inherit his unfinished ambition and completely wipe out Meng Yuan. This Fifth Highness is good at change, talented, and proficient in military training, and is actually a rare famous general seed.

What's even more rare is that he and His Royal Highness the Crown Prince are close relatives, and in the future, there is no need to worry about the occurrence of meritorious things like himself, if he can teach him what he has learned all his life, then he will close his eyes, and he doesn't have to worry about no one being able to suppress Meng Yuan!

(End of chapter)