The Qin Dynasty opened the Hengqu Four Sentences, sweeping away all the schools of thought

South Korean border.

On the official road, the carriage was moving slowly and steadily.

Ying Zheng held the "Strategies of Governing a Country" in his hand and asked curiously, "In your article, you mentioned Gongshujia and Mohism several times, and praised the art of government, saying that its importance is no less than that of Legalism and Confucianism. Why is that?"

Su Xuan did not rush to answer, but asked, "Your Majesty, what do you think the country's prosperity depends on?"

Ying Zheng gave the standard answer, "Wealth comes from farming, and strength comes from war."

Su Xuan nodded, then smiled and said, "If the Qin people rely on the advantages of tools, one person can cultivate several times more land than before. If the Qin soldiers rely on the sharpness of weapons, one person can fight against several enemies. Your Majesty, how much do you think the national strength of Qin will be improved?"

this......

Su Xuan continued, "Does your Majesty still remember the curved plow I invented?"

"With the help of the curved plow, the farming efficiency of the farmers can be increased by more than double. If it is promoted throughout the Qin State, how much do you think the national strength of Qin will be improved?"

"Several times more." Ying Zheng replied.

"In the past, the Chu State invented the battering ram. With the help of the battering ram, they defeated the Zhou Dynasty on the battlefield, confronted Duke Huan of Qi, and even destroyed the two states of Shen and Deng." Su Xuan asked again, "Advanced weapons are enough to change the outcome of a war. Do you agree with this, Your Majesty?"

Ying Zheng nodded slightly, and an idea flashed in his mind, "Sir, do you want me to pay attention to craftsmen?"

Su Xuan smiled slightly, "Rather than valuing craftsmen, it's better to value inventions."

"As long as it is beneficial to people's livelihood and can enhance the combat effectiveness of the army, it should be vigorously promoted and rewarded."

Ying Zheng's eyes moved slightly, and he seemed to have some intention.

It is indeed possible.

Su Xuan continued to add fuel to the fire, "Qin State has many skilled craftsmen, many of whom have ingenious ideas. If the king gives them rewards like Shang Jun did when he moved the trees to establish trust, do you think these craftsmen will be eager to serve? And can they invent useful tools and weapons?"

There was light in Ying Zheng's eyes and his heart was burning.

Maybe there is really great potential!

"Sir, you are truly ingenious and have a unique vision!" Ying Zheng was excited, holding Su Xuan's hand, his eyes eager, "I am so lucky to meet you!"

"It is my duty to contribute to the king." Su Xuan said modestly and did not care.

"Come to think of it, I do have a gift for the king."

Ying Zheng looked at Su Xuan curiously, feeling inexplicably expectant.

What surprises will the gentleman bring him?

Su Xuan slowly took out a long tube-shaped object from his arms, looked at Ying Zheng, and said in a deep voice, "This thing is called a telescope. With this thing, you can clearly see things thousands of meters away."

After listening to Su Xuan’s introduction, Ying Zheng’s eyes widened instantly. He could see things thousands of meters away. Isn’t this the legendary clairvoyance?

Could it be that sir has some magical powers?

He was amazed and curious. After Su Xuan explained how to use it, he couldn't wait to take the telescope and see if it was really that magical.

He placed his right eye on the end of the telescope and looked intently. The scenery thousands of meters away was as if he were there in person, with every blade of grass and every tree clearly visible!

He looked up and down, left and right, and could see it clearly from any position. After watching for a long time, he finally put it in his pocket with a sense of satisfaction.

What a rare treasure!

But after a while, he realized the importance of this thing.

If the generals of the Qin army could get the help of this thing, they would be able to anticipate the enemy in everything and make the most correct deployment. They would also be able to easily see through the enemy's conspiracies and tricks!

By then, among the armies of the six nations, who would be able to rival his Qin cavalry?

When he thought of this, Ying Zheng felt hot inside.

"Sir, where did you get this?" he asked hurriedly.

"Did your Majesty notice any difference when using the bronze mirror in Zi Lan Xuan?" Su Xuan asked with a smile.

Ying Zheng was thinking. When he first settled in Zi Lan Xuan, he used a bronze mirror to tidy up his clothes and found that it was bright and reflected things more clearly. At that time, he was curious whether there was a new bronze mirror. At that time, he even thought about asking the palace guards to buy a batch for him to use. But after meeting Su Xuan, he directly forgot about this matter. Now thinking about it again, he found something different.

He looked at the cylinder of the telescope and compared it with the bronze mirror in his mind, and found that the materials of the two were exactly the same!

What does this mean? It means that the manufacturing process of this thing has matured and he can manufacture it in large quantities. When he thought that all the generals and scouts of the Qin army could be equipped with telescopes, he couldn't help but feel excited.

"Did you make this thing, sir?" Ying Zheng looked at Su Xuan with burning eyes.

Su Xuan nodded. "The telescope is made of a material called glass. At first, it could only illuminate people and objects. But one time, a piece of glass, under the sun, actually ignited the straw. This aroused my curiosity, so I conducted an investigation."

He took out two pieces of glass from his arms and continued, "After some research, I found something interesting. When the glass is thick on the edges and thin on the inside, the objects in the field of vision will shrink, and you can clearly see the scene thousands of meters away. When the glass is thick on the inside and thin on the edges, the objects in the field of vision will be magnified. Even an ant can occupy most of the field of vision."

"I call these two pieces of glass a concave mirror and a convex mirror. The concave mirror disperses light, while the convex mirror gathers it. The final product is the telescope in the king's hand and the magnifying glass in my hand."

Ying Zheng was a little confused when he heard this, but at the same time, he inevitably felt curious and admired.

Sir, have you gone to this extent simply because you are confused?

He was deeply shocked. This was the first time he knew that light could both radiate and converge.

If even the trajectory of light can be changed, what else can't be done?

He looked at the magnifying glass in Su Xuan's hand curiously, with inquiring eyes.

Su Xuan's eyes moved, and he looked at the sky. The sun was shining brightly, and the weather was clear. He suggested, "If the king is interested, you can stop for a moment. There happens to be extra paper in the carriage."

Upon hearing this, Ying Zheng immediately became interested. He would know the effect after trying it.

He immediately stopped the carriage and found an open space to conduct the experiment.

He used a forked branch to hold the magnifying glass on top, and the paper was placed facing the magnifying glass. After doing all this, he stood aside with great interest, staring at it intently.

Seeing Ying Zheng like this, Su Xuan felt a little nostalgic. It was exactly the same as when he used a magnifying glass to light paper when he was a child.

Gai Nie stood behind and kept watch, glancing towards the experiment site from time to time.

Zi Nu and Nong Yu, who were sitting in a carriage behind them, got off and looked at it curiously after knowing what was going on.

But in just a moment, light smoke began to rise on the paper, and as the smoke rose, a flame suddenly appeared.

"Bright!" Ying Zheng shouted excitedly.

Su Xuan smiled slightly, it was worth it for him to set an example and guide slowly.

He knew that at this moment, the fire of scientific research in Qin State had been ignited.