Otaku Engineer in Great Tang Dynasty

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"Waterwheel?"

Cheng Yaojin heard Li Zexuan say that he was going to build a waterwheel. He couldn't help but look puzzled. After thinking for a moment in his heart, he couldn't help but say, "Xiaoxuan, you're right that the waterwheel should be overturned, right?"

After hearing Cheng Yaojin say this, Li Zexuan realized that he had said something wrong. According to the memory in his mind, it seems that there is no such name as a waterwheel. In most cases, people call it a rollover, so he quickly changed his words and said: " Uh! Yes, Uncle Cheng, it just rolled over!"

In folklore, the earliest water-drawing utensils of the ancients were "jujube". Now the weights are like weights, using the lever principle that Chinese people have discovered many years before foreigners to achieve the purpose of saving the power of drawing water.

The waterwheel in Chinese official written records did not appear until the Eastern Han Dynasty. At the end of the Eastern Han Dynasty, Emperor Ling of the Han Dynasty ordered Bi Lan to build a "rollover", which already had basic devices such as axle grooves. There is also a saying that during the Three Kingdoms period, the Wei people and horses also made rollovers. "Wei Lue" says: "Ma Jun lives in the capital of the capital. He has land as a garden, but no water to irrigate it.

However, the waterwheel at that time was only some basic ideas and some basic structures derived from it, and its driving method was relatively backward human-driven. This is the first stage of the development of China's waterwheel, and it is also the most primitive stage.

Cheng Yaojin couldn't help shaking his head and said, "Xiaoxuan, this overturned truck can be used to irrigate a small amount of fields, but if there are thousands of acres of land, it might be more convenient to use manpower to lift water!"

Qin Qiong nodded and said, "Zhijie is right. This waterwheel is indeed not suitable for large-scale farmland irrigation. It is time-consuming and laborious. Instead, it is better to fetch water!"

Li Zexuan thought for a moment, knowing that Cheng Yaojin and Qin Qiong must have misunderstood, so he smiled slightly: "Uncle Cheng, Uncle Qin, what I said about overturning is not the same as before, it doesn't need manpower to drive it. Instead, it is driven directly by the water flow, and its water output speed is much faster than the previous rollovers, and it can run around the clock, so instead of calling it a rollover, I’m more used to calling it a waterwheel~!”

Cheng Yaojin heard the words, his eyes were as big as copper bells, and he was surprised: "There is such a waterwheel that can be turned by the flow of water? Xiaoxuan, are you lying to the old man?"

Qin Qiong and Niu Jinda also exclaimed that it was incredible.

Li Zexuan said with a smile: "How dare my little nephew lie to a few uncles, after the morning court, my little nephew will go back to Yunshan to draw the drawings. It should take a few days before the workshop will be able to make the kind of waterwheel I mentioned. Create it!"

The waterwheel that he said can use the water flow to run by itself is called "drum car" in history. It originated in the late Tang Dynasty and flourished in the Song Dynasty.

Since its invention in the Eastern Han Dynasty and the Three Kingdoms era, the rollover has been stagnant in the stage of human operation. It was not until the appearance of the drum car that this situation was broken. The use of hydraulic and animal power as the driving force finally freed the manpower from the rollover pedals. "The "Drum Cart" not only has better irrigation efficiency than the previous overturned carts, but also saves manpower and material resources.

Moreover, Li Zexuan does not intend to copy the historical water tanker as it is. He will optimize and transform it on the original basis, adding gears, bearings and other transmission mechanisms to key parts to further optimize the operation efficiency and friction loss of the waterwheel. Now his workshop definitely has this craftsmanship and strength!

At this time, Li Zexuan had to admire his foresight. After he traveled to the Tang Dynasty, the first major thing he did was to set up the Qiquge workshop. Now, most of his honor and disgrace are related to this workshop~ !

"Haha! Good! When you build this kind of waterwheel, Xiaoxuan, you must tell me, Lao Cheng! This old man has lived for most of his life, and he has never seen a waterwheel that can move by itself, haha!"

Cheng Yaojin laughed excitedly.

Li Zexuan nodded and said, "Definitely, definitely~!"

Talking and laughing in a low voice all the way, they soon came to the palace. It was naturally impossible for the 50,000 left guards to enter the palace. When they were on Suzaku Street, they had already diverted to the main camp. The important generals in the army followed Li Er into the palace and accepted the reward!

This had nothing to do with Li Zexuan, so he stood there dozing off, and vaguely heard the reward of Yuchi Jingde, Chai Shao and others how much money, silk and satin, and food, etc., and then he quickly fell asleep. !

Yes, just fall asleep standing up!

Having been in the court for so long, Li Zexuan has long since acquired the ability to sleep standing up. Speaking of this skill, he still learned from Cheng Yaojin. Old Cheng has been in the court for more than ten years. The child is more slippery than Li Zexuan~!

"Reporting to Your Majesty, Wei Zuocheng has returned to the capital and is now outside the Taiji Hall~!"

In the drowsy, a high-pitched voice from the hall woke Li Zexuan from his sleep. When he recovered, he couldn't help but say in his heart: "Wei Zheng is back? No, no, no! I can't sleep anymore. If you let Wei Bunzi look at it, he will definitely read the book of Xiaoye!"

Li Zexuan quickly wiped the corner of his mouth, pretending to be full of energy, and stood up straight.

It is said that this kind of mess of dozing off in the courtroom is basically done by every minister. Therefore, when everyone sees each other, they will open one eye and close one eye to each other, but there is no room for sand in their eyes. Wei Zheng is different, at light he wakes you up, but at worst he will scold you for being disrespectful and ignoring your superior!

Li Zexuan's position in the courtroom is very close to Wei Zheng, and there are two people in the middle.

It's just that, I don't know if Li Er deliberately or unintentionally, this position was specially arranged for him, and he was not allowed to change positions without permission!

Therefore, Li Zexuan's drowsiness disappeared as soon as he heard that Wei Lunzi was back!

"Oh~? Wei Aiqing is back? Come in quickly~!"

Li Er, who was sitting high on the head, said with joy at this moment.

It's just that what Lao Li is thinking at the moment is unknown. After all, as soon as Wei thorn comes back, he will often put pressure on Li Er. If there is something wrong with Lao Li, Wei thorn will directly start spraying!

"Hey~!"

The maid left with hands handed over, and after a while, Wei Zheng strode in, his face still in the dust, he bowed to Li Er and said, "Old minister Wei Zheng, see Your Majesty!"

To be honest, since leaving Chang'an in the first month of the first month and going to Henan Road, Wei Zheng has missed Li Er a little in his heart since he hasn't been to the court for so long. Lao Wei respects and loves Lao Li from the bottom of his heart, and sincerely hopes that Lao Li can become a famous emperor through the ages!

Especially after Henan Road experienced a rebellion and died, Wei Zheng was even more eager to return to the court! So as soon as the matter on the Henan Road was dealt with, he came back without stopping!

"Wei Aiqing is exempted from the ceremony, I'm going to Henan Road, Aiqing has worked hard!"

Li Er quickly said "emotionally".

Although he was annoyed by Wei Zheng before, but after Wei Zheng was not in the court for so long, Li Er was still a little uncomfortable! Now that Wei Zheng is back, Li Er is inexplicably relieved for some reason!

"Thank you, Your Majesty!"

Wei Zheng stood up and said: "Your Majesty, when the old minister was in the first month of the month, he was ordered to send Cui Junchuo back to Zhengzhou, and picket the illegal things that the Cui family has done over the years, and by the way, clean up Henan's officials. Together with the Cui family of Boling and the Zheng family of Xingyang, they secretly rebelled.

Afterwards, His Majesty dispatched a large army to Guancheng to quell the rebellion. After the rebels were ambushed, the old minister stayed in Henan Road to appease the people, and investigated the officials who had connections with the Cui family. A total of 33 officials were found. All the evidence was conclusive. People have now been detained in the Dali Temple prison, waiting for His Majesty's release! Fortunately, the old minister on the trip to Henan did not disgrace his life, and he came to deliver the order today! "

At the end, Wei Zheng bowed down and bowed his hands.

Li Er nodded and said solemnly: "Wei Aiqing's journey is extremely difficult and dangerous. In order to clear the Henan Daoist government, he took risks, and even risked his life many times. I am very moved, and Henan Road is also because of Wei Aiqing's efforts. , I was able to reproduce the bright world, and I decided to add Aiqing as the Prince Shaobao, Doctor Jinziguanglu, and give 300 households in Shiyi~!"

Wei Zheng bowed and said: "I thank you, Your Majesty~! But when I came back, I saw that many farmlands had suffered a very serious drought along the way, and many people were fetching water from the river to irrigate the land. The Ministry allocated money, and the Ministry of Industry dispatched craftsmen to help the people clear the channels and relieve the drought!"

Li Er heard the words, frowned, and said: "I have already known about this matter, and the imperial court will allocate human, material and financial resources in a few days, so that local prefectures and county officials will help the people to clear the channels and ensure that the farmland with low terrain can be used. The river is irrigated!"

Wei Zheng breathed a sigh of relief and cupped his hands: "Your Majesty Shengming! In this way, the drought can be alleviated to the greatest extent, and the losses of the common people can be reduced!"

Obviously, Wei Zheng also understands that it is impossible to take care of all the farmland with this level of drought now, and some farmland that cannot be reached by ditches can only rely on the people to fetch water~!

"Hey! Who said that high-altitude farmland can't be watered? As far as I know, the Marquis of Yongan will build a rollover that can move by itself, and transport the water from low to high~!"

Cheng Yaojin couldn't help showing off at this moment.

In the early morning today, he was watching others get rewarded. Cheng Yaojin thought it was boring, but now he finally found such an opportunity to show off, how could he miss it?

The court in the early Tang Dynasty was still relatively free. Cheng Yaojin said for no reason. No one blamed him. Instead, everyone looked at him with burning eyes. The character has become the protagonist!

Li Zexuan couldn't help but covered his face, thinking to himself that Lao Cheng really couldn't hold his breath, the waterwheel hasn't been made yet, so you took it out and bragged, didn't you blow it a little too early?

"Lu Guogong, are you telling the truth? Is there really that kind of overturned car that can move and carry water by itself?"

Wei Zheng looked at Cheng Yaojin with excitement and asked.

Although Mileage Yaojin always bickers with him on weekdays, Wei Zheng still knows to put aside those personal feelings when it comes to such big things.

"Hey~!"

Cheng Yaojin sneered, and said proudly: "When my old Cheng speaks, one spit and one nail can still deceive you, Wei Xuancheng~? If you don't believe me, go ask the Marquis of Yongan!"

This demeanor is as if he wants to build a waterwheel himself!

Wei Zheng was too lazy to care about the old goods, he quickly turned his attention to Li Zexuan, and at this moment, Li Er finally couldn't help but say: "Marquis of Yongan, is what Cheng Zhijie just said true?"

Li Zexuan knew that he could no longer keep a low profile, so he walked out of the Wenchen team, stepped forward and bowed: "Go back to your majesty, there is indeed such a thing, this kind of overturned car is called a waterwheel, it does not require manpower to step on the pedals, it completely relies on water power. It can work. But these are just some ideas in the mind of the minister, and they have not been created yet. Your Majesty will give the minister a few days, and then you will know whether this method is feasible~!"

Listening to Li Zexuan's affirmation, the ministers couldn't help but feel

In shock, Wei Zheng trembled with excitement, only to hear him mutter: "It's saved, the people are saved now!"

Li Eryi was also shocked, he looked at Li Zexuan with piercing eyes, and said, "Waterwheel? Good! In the past few days, I have asked you to concentrate on developing this waterwheel. If you do it well, I will definitely reward you~ !"

"Sir, obey the order!"

Li Zexuan bowed.

After all, he couldn't help but look at Cheng Yaojin resentfully. The improved version of the waterwheel was just casually said in the morning. He didn't even know if it could be built successfully. He knew everything up and down, he had to build a waterwheel no matter what, and it was successful!

…………………………

After getting off the morning court and coming out of the palace, Wei Zheng had no time to gossip with Cheng Yaojin, Qin Qiong and other elders, so Wei Zheng urged Li Zexuan to hurry back to develop a waterwheel.

"Marquis of Yong'an, the drought is like fire. For the sake of the world, you can build the waterwheel you mentioned as soon as possible! Otherwise, I don't know how many people will lose their crops this year! Old man It hurts to look at!"

Although Wei Zheng didn't clearly urge Li Zexuan to go back to Yunshan, but the resentful little eyes still made Li Zexuan feel uncomfortable for a while. Therefore, Li Zexuan hurriedly handed over and responded, and immediately hit the horse back to Yunshan!

It is said that although Wei Zheng sometimes likes to dig into the bull's horns, this old man is thinking of the people in his heart, and it is precisely because of this that Li Zexuan has more respect for Wei Zheng.

"Master, are you back~?"

Seeing that Li Zexuan was back, Han Yuxi quickly stepped forward and said.

"Well! Madam, I have something to do for my husband, so I won't eat at noon! Don't let anyone go to the study to disturb me~!"

Li Zexuan confessed to his daughter-in-law and hurried to the study.

He wants to quickly draw the improved version of the waterwheel blueprint!

Not only did Wei Zheng know that the drought was like fire, he also knew it.

……………………

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