"Quarz sand, soda ash, limestone."

Wang Chong chanted the words on the paper, scratched his head, and his mind was covered in mud.

Only limestone knows the things in this.

It is necessary to use it for iron smelting and calcining cement.

Zhao Xu knew that Wang Chong could not understand this thing.

So he said, "This quartz sand is similar to the sand by the river, but this sand is white."

"White sand? Your Highness, I have seen this thing. When I visited Liao County when I was traveling with my father, there were all such sand on the lakeside there. It was strange at that time?" Wang Chong thought about it carefully and suddenly remembered.

"Liao County, indeed, it is indeed an important place for this kind of sand." Zhao Xu nodded with a smile.

The knowledge in his mind is real.

Moreover, after living here for so long, he basically mastered the administrative division of Dasong that is equivalent to what is the contemporary world?

This Liao County is equivalent to the near Lingshan County in Hebei in contemporary times.

In contemporary times, this place is a famous quartz sand production area.

So Wang Chong said that he was not surprised that he found this kind of sand in Dai County.

"Well, it's easy to obtain the raw material of glass." Zhao Xu said to Wang Chong.

Liao County belongs to Yanzhou and is not very far from Yan County.

If the merchants knew that this kind of sand that they didn't want could be sold for money, they would definitely go to Liaojun to transport the quartz sand to him.

"Your Highness, what is this soda ash?" Wang Chong asked again.

Now two of the three raw materials have been solved. As long as you understand the soda ash, you can make glass.

"It's the white powder used to steam buns." Zhao Xu said.

Soda ash had a long history in ancient times. At first, people obtained soda ash from shells and wood ash. After discovering natural ketone ores, they became popular on a large scale.

Soda ash is widely used in the production of various pasta dishes in the north, so soda ash is used more widely.

"So it's this." Wang Chong knew it. He looked at the method of melting these three ingredients on the paper and nodded slightly, thinking that he could try it.

"Quarine sand is in Liao County, and soda ash is in Yuzhou. Before letting merchants go to these two places to purchase raw materials, you can create the heat storage room on the map." Zhao Xu added.

The Yuzhou in Dasong is equivalent to the contemporary Henan.

In Wucheng, Henan, there is one of the largest open-air natural alkali ore in China, with reserves of over 100 million tons.

He asked Yang He that the alkali merchants in Yanzhou all bought alkali from this place.

In this way, there is quartz sand in Liao County and soda ash ore in Yuzhou.

This is not a problem for making glass.

"Your Highness is so knowledgeable and knowledgeable, and you know everything." Wang Chong's eyes were full of worship.

It’s okay to have quartz sand, but the King of Yan actually knows where to buy alkali.

This really saved him a lot of time.

Zhao Xu laughed twice, without explanation.

Instructing Wang Chong to prepare for the glass construction, Zhao Xu went out of the Military Affairs Office and headed towards the North Camp.

Last time in Shanggu County, he mentioned that it was not just a casual statement that he wanted to establish a school in the army, but that it was necessary to implement it.

One of his purposes was to improve the general's combat quality.

Another one is to strengthen his prestige in the army.

With the emergence of artillery, the destructive power of the royal family's personal army also increased.

He must hold such an army firmly in his hand, and he doesn't want his army to turn its guns to point at him one day.

Arrive at the camp.

The soldiers are training under the command of generals at all levels.

Chang Wei rode his horse to patrol the camp.

Seeing Zhao Xu coming, Chang Wei rode over.

"Your Highness." After getting off the horse, Chang Wei bowed.

"No gift." Zhao Xu nodded.

He looked at the soldiers in the field who were sweating due to training, and did not immediately mention the school matters, but asked, "Have you thought about how to use artillery on the battlefield?"

After the artillery was built, he did not tell Chang Wei about the method of using artillery on the battlefield, but asked him to think about it himself.

After all, what you think of is deeper.

However, if Chang Wei thinks unreasonablely, he can only show it to him.

When asked this question, Chang Wei became unconfident.

If he talks about the battle formation he usually trains, he is not afraid of whom he chooses from the Dasong Army.

But it was the first time that the big girl was in the sedan chair.

"I thought it would be similar to that of a musket. Before the war, put the gun in the front and fire a few guns at the enemy." Chang Wei said.

Zhao Xu frowned when he heard this.

He felt that he overestimated the ancient generals' understanding of firearms.

But this cannot be blamed on Chang Wei.

After all, in the contemporary Ming and Qing dynasties, artillery was also played like this. Like bows and arrows, they only had three shots in front of the battle.

"Wouldn't it be impossible to use the advantage of artillery like this?" Zhao Xu asked, "Besides, if the opponent's cavalry rushed past and nailed the medicine hole to death with nails, wouldn't you be blind?"

Chang Wei was stunned when he heard this. If the medicine hole behind the cannon was nailed to death, the cannon would be destroyed.

At this time, he looked at Zhao Xu.

The cannon was made by the King of Yan, and he believed that the King of Yan would definitely know how to use it.

For him, face is not important, it is important to be able to learn something.

So he asked with a hippie face: "Your Highness, please teach the last general."
Chapter completed!