Xi Yu thought about it carefully.

If I remember correctly, it was at this time that Cao Cao, who was in Yanzhou, began to communicate with the Han court.

It's just that listening to Cao Cao say this now, I think he hasn't been in contact with the imperial court yet.

Who is the key person missing?

The time is too long, and the characters at some nodes can't remember for a while.

However, it doesn't really matter.

When it's time to appear, that person will naturally appear.

Smiling at Cao Cao, Xi Yu didn't say anything more.

The most important thing at the moment is to ensure that the harvest is not affected by the weather.

After returning to Changyi with Dian Wei, Xi Yu began to recruit craftsmen in the name of Cao Cao, and at the same time drew out the drawings overnight.

Following.

The sky is bright, and the county government compound.

Xi Yu took the drawn drawings and glanced at the craftsmen who had been summoned.

They are all craftsmen who belong to Cao Ying, and these people build some vehicles and weapons in Cao Ying on weekdays.

Seeing that there were quite a few people, Xi Yu directly handed the drawings to the leading craftsman.

"What is this?"

Ma San looked at the drawings handed over by Xi Yu in front of him, and the whole person was stunned for a moment.

He was one of the more famous craftsmen in Cao Ying, but it was the first time he had seen such detailed drawings.

Just by a glance, Ma San was a little shocked.

The drawings in front of me are so detailed that each part is marked very clearly.

"My lord, what does this thing do?"

A craftsman couldn't help but ask.

They usually build some ordnance and other things, but what they see in front of them looks quite weird.

It doesn't look like a chariot, the baffles are a bit like a stone-throwing cart, but a little more complicated.

"It's called a waterwheel, and it's built on a mountain stream to bring water to the farmland."

For these craftsmen, Xi Yu did not hide the slightest.

In itself, these craftsmen are needed to build the waterwheel, and after this thing is built, these craftsmen will understand the role of this thing.

If he remembers correctly, the prototype of the watermill appeared around this era.

It is called a rollover, and it was built by Ma Jun, a Wei man.

If Ma Jun can be found, Xi Yu thinks that many of his ideas should be realized.

However, it is still far from the establishment of the Wei State!

If I remember correctly, Ma Jun is a native of Yongzhou.

However, at present, the thirteen states of the Han Dynasty, Yongzhou has long been divided, and now Fufeng is subordinate to Sili.

If you want to find Ma Jun, you have to wait a few more years.

……

Xi Yu took Dian Wei here to build a waterwheel with craftsmen.

On the other side, Cao Cao at this moment was looking at Mao Jue in front of him lightly.

The latter is a talent who came to serve after Cao Cao's victory in Yanzhou, but the first strategy that the other party offered to him a few years ago lacked some overlap with Xi Yu.

And the strategy of Tuntian is naturally not as detailed as Xi Yu.

Cao Cao felt that although this person was talented and capable, but if he really wanted to compare it with Yu, it was still a little far behind after all.

Therefore, after that, he regarded Mao Jue as a staff member.

On weekdays, let the other party help with some things.

"Xiaoxian, you said before that the Son of Heaven has ordered not to be subordinate, but now I can't even do it, how should this be good?"

Cao Cao asked casually.

He is not in a hurry to meet the Son of Heaven at the moment, on the one hand, Li Wei, who is in the subordinate, Guo Yan will never let him meet the Son of Heaven.

On the other hand, he has only just established himself in Yanzhou, and it is not yet time to start expanding completely.

The reason why he was in a hurry to get in touch with the imperial court was because he wanted to put on the table for Xi Yu before, but he was blocked.

Knowing that Fengyi was busy building utensils that brought water from him, Cao Cao had mixed feelings in his heart.

The good thing is that Xi Yu can always surprise him in times of crisis.

The worry is that he can't even present a performance for Xi Yu now.

Mao Jue had naturally heard of Xi Yu, and when he heard Cao Cao say this, he had already guessed the other party's thoughts.

Although he was a little envious, since he learned about Xi Yu's military strategy, that envy was suppressed in the bottom of his heart.

"Lord, I heard that Hanoi Zhang Yang seems to have an old relationship with Li Dao, the lord can contact Zhang Yang first, and then Xu Yili, he can make friends with Li Dao and others, and there should be no problem in opening up the relationship between the court at that time."

After Mao Jue's words fell, Cao Cao's eyes lit up.

Then he nodded: "In this way, this matter will be left to Xiao Xian to do!" ”

……

Early July.

A huge waterwheel landed in the Yanzhou mountain stream.

The mountain stream water stream drove the waterwheel to operate, and the flap drove the water into the waterwheel, and the water began to flow straight down the mountain stream and ditch to the farmland.

Seeing that the water was really being drained, Cao Cao's eyes couldn't help but widen.

"It's really as Fengyi said, the water comes from the water, the water comes from the water!"

At present, the farmland in Yanzhou, which has been dry for a long time, can be irrigated, and the whole Yanzhou will no longer have to worry about grain and grass.

Cao Cao was overjoyed, and the whole person became more and more excited.

Soon after, water wheels began to appear on the riverside throughout Yanzhou.

Mid-July.

Mao Jue, who was entrusted by Cao Cao, met Dong Zhao who was hiding under Zhang Yang in Hanoi.

This person was originally Yuan Shao's subordinate, because his younger brother Dong Wan was under Zhang Miao, and Yuan Shao and Zhang Miao had many disagreements.

Because Yuan Shao listened to slanderous rumors, Dong Zhao was afraid that he would be implicated and fled from Yuan Shao's men overnight.

Originally, he planned to go to Chenliu to join his brother, but he didn't expect to be directly stopped by Zhang Yang, who was in Hanoi, halfway.

After getting acquainted with Mao Jue, Dong Zhao was a little overjoyed when he learned that the other party was sent by Cao Cao.

Then the two hit it off.

Dong Zhao began to persuade Zhang Yang to unite with Cao Cao, and the latter listened to Dong Zhao's advice after a long time.

And as Cao Cao began to establish diplomatic relations with Zhang Yang, not long after, Li Dao, who was in the division of the division, and Guo Yan did not stop Cao Cao's recital to the imperial court.

At the beginning of August, a letter from Yanzhou fell into the hands of the young Liu Xie.

Inside the Han Palace.

Liu Xie, the thirteen-year-old son of the Han Dynasty, received Cao Cao's recital for the first time.

The young man excitedly flipped through the watch, and his flickering eyes seemed to be glowing.

"Yanzhou Mu Cao Cao's recital!"

"Xi Yu, who is Xi Yu?"

Cao Cao's recital first asked Emperor Han if he was doing well, although it was some polite words, but Liu Xie saw it with relish, this was the recital given to him by a state pastor.

Subsequently, he saw the text in Cao Cao's recital.

The appearance of Xi Yu's name made Liu Xie couldn't help but be a little puzzled.

"Yanzhou harvest, Quyuan plow? Water Wheel......"