Three Kingdoms: Cao Cao, please answer the question!

"After taking Jiaozhou, we can not only get land, but also get more soldiers."

This is Sun Quan's next plan.

Earlier, Liu Biao also spied on Jiaozhou, but was dismissed by a letter from Cao Cao. Cao Cao appointed Shi Xie as Suinan Zhonglang General, Governor of the Seven Counties of Jiaozhou, and also served as Jiaozhi Prefect.

Even so, Shi Xie's strength is not strong, and Sun Quan believes that Jiaozhou can be easily taken.

Jiangdong is now facing the imperial court in the north, the sea in the east, and the chaos in Jingzhou in the west.

Now the only breakthrough seems to be Jiaozhou.

If they win Jiaozhou, they can also reach Yizhou from Jiaozhou.

Sun Jian nodded, agreeing with his son's plan very much.

"Perhaps we can use this to weaken the strength of the family!" He reminded.

Sun Quan nodded: "My child is thinking about it!"

After finishing speaking, the two walked out of the house and met Zhou Yu head-on.

Zhou Yu cupped his hands and said, "Congratulations to General Sun for making it to the next level!"

Sun Jian said to Zhou Yu: "Gong Jin, you will follow the child back to Jiangdong to deal with the chaos, and the things in Hefei also need you to be more distracted."

Zhou Yu said naturally: "General Sun, please rest assured!"

Sun Quan and Zhou Yu went down the river and left with thousands of soldiers and horses in a boat.

But there are still more than [-] people left in E County.

As soon as Sun Quan left, Sun Jian ordered to occupy Zhu County, which was upstream of E County, but Sun Quan had already occupied it.

But before, people were only sent to manage Zhu County, but now they are sending troops to station.

If Cao Cao went south, Zhu County would of course be the first to encounter it, followed by E County.

……

But on the other side.

Cao Cao, who occupied Xiling, waited until Lu Jie and Dian Wei returned, but did not see Liu Bei's head.

Not only Liu Bei, but even one of his generals did not stay.

But Liu Qi died.

After listening to Lu Jie's report, Cao Cao said in a deep voice, "Zhuge Liang is clearly afraid of returning to E County and being annexed by Sun Quan. Where is there any ambush?"

"Or who will lie in wait for them?"

He knew Zhuge Liang's purpose at once.

At this time, Lu Jie also wanted to understand, and he quickly knelt down on the ground, "Damn this subordinate, you can't break the mystery!"

Damn it indeed, there was a chance to wipe out Liu Bei's forces, but he let Liu Bei go.

How could Liu Bei's soldiers and horses block the tiger and leopard cavalry?

But now that Liu Bei has escaped, Mrs. Gan and Liu Chan in his hands have not lost their effect.

This can be said to be a blessing in disguise.

Cao Cao waved him to get up, and said, "Let's leave it at that, I'll punish you to study Sun Tzu's Art of War."

"Since Liu Bei is going south, his goal may be Changsha. Changsha has a veteran Huang Zhong, who is one of his five tiger generals, and should not be underestimated."

"If Changsha County is taken by Liu Bei, the headache will not be us first, but Sun Quan."

Dian Wei said from the side: "Please let me take down E County, Prime Minister."

Cao Cao shook his head and said: "E County is definitely going to be taken, but it needs to be taken slowly, and we can't lose a lot of soldiers and horses."

"Now that they have retreated to E County, most of Jingzhou already belongs to us. Our next goal is to occupy Changsha, Lingling and Guiyang."

"Of course, we can also win Yizhou first."

Liu Zhang's power is not weak to Sun Quan and Liu Bei, but it is nothing to Cao Cao.

At this time, Youma entered Xiling City.

Urgent report: "Sun Quan assembled an army of [-] to take Hefei!"

Cao Cao frowned: "I didn't expect that their purpose is not only to eat Jingzhou, but also to attack Hefei!"

"If Hefei is lost, Yanzhou and Yuzhou will be in danger."

"We must go to the rescue!"

……

Chapter 117 The Telescope

Hefei belongs to Yangzhou, and it was just an empty city when Cao Cao took it.

After that, he sent Liu Fu, the governor of Yangzhou, to Hefei, but the governor of Yangzhou was actually only in name.

Hefei and Lujiang controlled by Cao Cao are just a small area in Yangzhou.

But Hefei's geographical location is extremely important. It can be said that it is a small Jingzhou between Cao Cao and Sun Quan. The water system here is developed and there are many farmlands.

Cao Cao occupied this place and asked Liu Fu to take in the refugees, to farm extensively, and to build city defenses.

Build a city, use it as a boundary, and overlook the Yangtze River.

The reason why Cao Cao was unable to attack Sun Quan was because of the natural danger of the Yangtze River, and now Sun Quan in Jingzhou lost half of his natural danger advantage.

As long as the navy is properly trained, they can enter Yangzhou directly from the river.

This is also one of the reasons why Sun Quan did not dare to hand over Jingzhou to him easily.

And if Sun Quan takes Hefei, Cao Cao will no longer be able to touch Yangzhou from the back. This is a very important place.

Originally, Cao Cao thought that Sun Quan sent an army to take Jingzhou, but he didn't expect that he even sent an army to Hefei.

"Li Dian gave you 1 people to guard Xiling, and Lu Jie gave you 2 people to guard Xiakou."

"Afterwards, Wuchang and other places will be annexed, at least all the places outside E County will be occupied. Li Dian will be the governor of Jiangxia, and Lu Jie will be the county lieutenant!"

"The minister takes orders!" The two replied in unison.

"The two of you don't let Sun Quan have an opportunity. First, send people to investigate E County and Zhu County and other places to see if Sun Quan has occupied them all."

"Taking Xiakou as a critical point, we must not allow it to go north!"

After finishing the order, Cao Cao had no intention of staying in Xiling.

He followed an army of more than [-] from north to Nanyang County to Sui County, and then went west to Xiangyang.

As soon as they arrived in Anlu County, they met Wenpin.

Wenpin wanted to go south to Xiling to meet Cao Cao, but he didn't expect to meet him halfway.

Wenpin came to see Cao Cao with a man. The man looked mediocre, just an ordinary person.

"This person is the one who gets the reward!" Wenpin twisted him closer to let Cao Cao see clearly.

Cao Cao only glanced at the man. He was of medium build and dressed in short brown, but he was no ordinary person.

It looked like he was only [-] years old, and he never raised his head because he was a little scared. Although he tried his best to stop him, he could find that his hands and feet were trembling slightly.

He asked Wenpin: "What reward can he get?"

"Let him speak for himself!" Wen Pin looked at the man, and yelled at him to make him kneel down: "Don't you still want to meet the prime minister?"

"Grassman Yu Gengnian pays homage to the Prime Minister!" Yu Gengnian said.

He was originally from Anlu. His parents, wife and children all died of the epidemic, leaving him alone.

He didn't want to live, but he didn't dare to let him commit suicide.

There is great terror between life and death. Every time the knife is raised, the heart beats violently, and the fear is transmitted directly to the mind.

He failed to commit suicide, and he felt that he was a useless person, so he lived a decadent life every day.

When the answer field appeared, he didn't want any rewards, but saw the word obliterate.

He wasn't sure, though, until he later saw the Obliterated One with his own eyes.

He was extremely happy, yes, happy.

Finally, no longer need to live in this miserable world!

Then came the multiple-choice questions. How many times did Zhuge Liang fail at Qishan and died in Wuzhangyuan?

He chose d without hesitation, six times.

But unexpectedly, it turned out to be correct.

When the reward fell, he still couldn't believe it.

"I think it's because my family wanted me to live, and my parents wanted me to pass on the incense, so I didn't die."

"After that, I met the general!"

It seems that he is just a lucky one, Yu Gengnian continued: "The reward I got is in my mind, and it is a method of making a telescope."

"Telescope, what is that?" Although Cao Cao already knew the general purpose from the name, he still asked.

Yu Gengnian explained: "This telescope allows people to see farther places."

"In pure air, the human eye can see a candlelight fifty miles away, and a ship forty miles away on the sea."

"But we can't see the specific details. The telescope can pull things in front of us."

As he spoke, he said, "Boldly ask the prime minister for a leaf and a drop of water."

Cao Cao ordered someone to pick a leaf and a drop of water.

Yu Gengnian continued: "The Prime Minister can drop water on the leaves, one drop is enough."

Cao Cao complied.

The water drips on the leaves, it looks nothing, very natural.

But Cao Cao observed Ruowei, and immediately discovered that the leaves on the leaves through the water droplets are somewhat larger than the surrounding ones.

"I believe the Prime Minister has seen it. This is the effect of the telescope." Yu Gengnian said.

Cao Cao pondered and said, "Could it be that this telescope is made of water?"

Yu Gengnian shook his head and said, "Of course not. The production of this telescope requires a kind of transparent glass, but the grassroots don't know how to make it."

"However, it can be replaced with a crystal that is transparent and free of impurities."

Crystals are not expensive things, and may be difficult for ordinary people to see.

But Cao Cao can even enter the treasury, so there are still transparent crystals in the treasury.

But Cao Cao wasn't sure if this thing was useful, after all he couldn't see the real thing, so he said, "How far can you see?"

Yu Gengnian replied: "If the lens is clear enough, the bark texture of a thousand steps away can be clearly seen, and even the stars in the sky can be seen."

"Like the moon, you can see the pits and mountains on it with a telescope."

These are all attached information after Yu Gengnian accepted the reward.

"Mountains? Could it be that there are people on the moon?" Cao Cao asked with interest.

"Of course not. There are no trees on the moon, only potholes, and no living things can live on it."

In order to show his worth, Yu Gengnian said again: "Does the prime minister know how far the moon is from us?"

How did Cao Cao know, he thought to himself:

"There is a legend in "Huainanzi" that Chang'e flew to the moon. In "Shan Hai Jing", Di Jun's wife, Chang Xi, is the mother of the twelve moons. But I don't know how far away it is."

"The moon and the sun run side by side. The sun rises in Yanggu and sets in Shibuya. Presumably the moon also has a place to rise and set."

"When rising high, the sun and the moon should be thousands of miles above us."

Ten thousand miles is already very high. After all, even if it is a mountain, there are not many hundred miles high.

Yu Gengnian explained: "It is 90 miles away from us, and the terrain above can be seen with a telescope on a cloudless night."

It turned out to be 90 miles.