As for what the waterwheel is, Bai Ren doesn't know. But after Xiang Cheng's explanation, Bai Ren instantly understood the role of this thing, and admired Xiang Cheng even more for being able to come up with such an ingenious object.

The waterwheel in the historical record was only produced in the Eastern Han Dynasty. At the end of the Eastern Han Dynasty, when Emperor Ling, he ordered Bi Lan to build a "rollover", and there were basic devices such as axle groove plates. There is also a saying that during the Three Kingdoms, the Wei people and horses also had the manufacture of "overturned", no matter who created the "overturned" in the hand, in short, from the Eastern Han Dynasty to the Three Kingdoms, the "overturned" was officially produced.

And Xiang Cheng's waterwheel is more advanced than the "overturned" that should have appeared in the Eastern Han Dynasty or Wei State. This waterwheel not only has one set of gears, but as many as three groups, and there are "water turnover", "ox turnover" or "donkey turnover", which can be used according to the wind and terrain.

So it's troublesome to make.

Xiang Cheng said: "Bai Ren, find a few trustworthy soldiers, let them organize production according to the parts, and when the parts are all produced, you gather together, and we will assemble them ourselves." ”

After all, in this era, technology is the productive force, and the productive force represents the military power.

And with the waterwheel, you are not afraid that God will not rain, although there is a river in this place in Nanyang, but most of the cultivated land still depends on the sky to eat, this year's wind and rain will have a good harvest, if God does not give face, the harvest can drop by more than half.

But when you really build a waterwheel, it's different.

Although it does not play the role of diverting water from the south to the north, there is no problem in diverting water for irrigation in a small area. Moreover, as far as Nanyang and Jiangxia counties are concerned, if there is enough water to irrigate the farmland, the yield of crops harvested once a year can be at least two to three percent.

Bai Ren didn't delay any longer, and ran out with the drawing (actually the "skin" of the drawing) in his arms.

It is naturally not a big problem for Bai Ren to find someone to produce a waterwheel, judging from the understanding of the character of these soldiers, Xiang Cheng is actually not as good as Bai Ren's understanding, he only knows who can fight and who can't.

Since Bai Ren took away the drawings, Xiang Cheng occasionally led his soldiers up the mountain to find out the movements of these rogues, and he organized these people to practice non-stop.

And so it passed ten days.

The sun came out very early that day, because it was only March or April, but the sun came out at least a day or two earlier than the previous days.

Xiang Cheng was lying on the bed, the sun shining through the glass was dazzling, and in desperation, he had to get up. Before he could finish cleaning up, Bai Ren came over.

"Jiyu! And Yu! Bai Ren shouted twice at the door, and Xiang Cheng responded: "Come in." ”

After Bai Ren entered the door, his face was full of red light, as if he had just drunk two catties of liquor. Xiang Cheng was naturally curious, but he didn't wait for the question, he only heard Bai Ren suppress his voice and say, "That thing, it's done." ”

Xiang Cheng naturally knew what "that thing" in Bai Ren's mouth was, and he didn't forget the design of the waterwheel he handed over to Bai Ren because there was no movement in the past ten days.

Xiang Cheng also said excitedly: "How many sets did you get?" ”

Bai Ren looked left and right, leaned over Xiang Cheng's ear and said, "There are three sets in total." ”

Looking at Bai Ren's appearance, Xiang Cheng didn't dare to laugh, and he didn't know why this person was like a thief even though he had a treasure.

In fact, Bai Ren didn't know why he was like a thief, as if this thing would be captured as long as it saw the light. Anyway, at this moment, the two people in Xiang Cheng's house looked at each other as if they had stolen a peerless treasure, and they kept laughing at each other.

After laughing, Xiang Cheng waved his hand and said, "Let's go, take me to see." ”

The place where this thing is placed is heavily guarded, and Bai Ren is still a careful master after all. Outside a huge firewood house, two teams of soldiers were constantly patrolling.

If the thieves really saw it, they would think that there were piles of gold in this firewood room.

This house was newly built, and Bai Ren still had some skills after all, not only made three sets of waterwheels in ten days, but also made a five-zhang square house.

When I went inside, the room was full of mechanical parts, neatly arranged in the room. After counting them, the parts are exactly the same.

Xiang Cheng asked, "Are these things made by our soldiers?" ”

But anyone who has a craft rarely thinks about joining the army. How terrible the battlefield is, there are many dead and wounded at every turn, these craftsmen can only have a craft to maintain their livelihood, and basically they will not die of hunger, unless there is a famine.

Bai Ren said with a smile: "It's not all, how can our soldiers have this kind of skill, they are just helping to do it." ”

Xiang Cheng was shocked and asked, "How many people do you find to make these things?" ”

Looking at the panic on Xiang Cheng's face, Bai Ren smiled and said, "Don't panic with Yu, I know it in my heart." Seeing that Xiang Cheng still didn't believe it, Bai Ren straightened his expression and whispered: "There are seven kinds of these things according to parts, so I found seven craftsmen to make them, and these seven people were arranged by me in other different places." ”

After hearing this, Xiang Chengcai put down his hanging heart, patted Bai Ren on the shoulder, patted his chest and said, "Zifu, you scared me to death - take inventory, let's find a place to install it." ”

Bai Ren had long wanted to see how this thing worked, and when he got the order, he couldn't wait to go out and call someone to help.

It is precisely because he can't wait that he has already prepared a car or a person. After a few moments, the room was filled with soldiers who were in good spirits, but didn't know what to do.

Xiang Cheng gave an order, and these soldiers didn't ask much, and put these bits and pieces on the car outside the door. When everything was in order, Xiang Cheng and Bai Ren walked towards Tian Ridge in one car and one car. At the end, Bai Ren shouted again: "Go, invite all the generals!" Of course, this was for the soldiers.

Xiang Cheng and Bai Ren set out from the city, and when they arrived at Tianlong, these generals were already there.

They thought that Xiang Cheng had discovered the traces of the Liukou, so they summoned them. can see that Xiang Cheng was driving a carriage when he came, and there was a pile of "firewood" on the cart, and he was immediately confused.

Gan Ning shouted: "Jiyu, are you going to add food to us?" Hahahaha. ”

Xiang Cheng didn't understand, and hurriedly asked, "How do you say this?" ”

Gan Ning said again: "You have some firewood in the car, don't you want to have a barbecue with us here?" ”

Xiang Cheng understood what Gan Ning said, and immediately scolded with a smile: "What a Jinfan Gan Xingba, he turned out to be a foodie who thinks about eating and drinking all day long, hahahaha." ”

"Then what is the use of your firewood?"

"You can see it when you look at it." Xiang Cheng sold Guanzi.

The farmer on the ridge of this field only looked at this general, and did not know what he was fiddling with in the field, and the remaining generals even attacked him. After fiddling with it, General Xiang drove the carriage to the river and continued to fiddle with the things in his hand.

After another half of the day's excitement, the waterwheel finally took shape, and Xiang Cheng shouted: "Come on, come on, you guys together, try the waterwheel with me!" ”

Although Gan Ning and the others were surprised that these firewood were actually put together into a big wheel, they didn't expect that this big wheel was actually called a waterwheel. It wasn't until Xiang Cheng summoned that this general stood on top of the waterwheel with three points of curiosity, three points of timidity, and four points of helplessness.

A few people exerted force under their feet, the waterwheel slowly rotated, and the fan leaf bamboo tube would be turned over one by one, bringing up the water source of the river, and flowing all the way down the waterway paved by Xiang Cheng, going straight to the ridge.

The more a few people stepped on it, the more brisk it became, the waterwheel moved, coupled with the strength of the water flow, it didn't take long for it to start flipping on its own, and there was no need for Xiang Cheng and others to step on it.

Seeing this, Bai Ren was even more overjoyed, and Xiang Cheng, wiping the sweat on his forehead, took everyone to the ground, and then asked: "How about it, the dealer will not worry about watering now." ”

Not to mention these generals, even the croppers in the fields all understood the role of this waterwheel, and at this moment, they all bowed down in unison, shouting "Long live General Xiang". It's a shame that there is no one arranged by Liu Hong here, otherwise with these words, Xiang Cheng is estimated to die a hundred times.

But as the saying goes, "Blessings and blessings lurk in disguise, and blessings and blessings rely on." ”

Before Xiang Cheng and the others could get happy, they saw Deng Nuo's face covered with dust, and he didn't know what was scratched on his clothes, so he ran all the way towards Xiang Cheng.

When he saw Xiang Cheng, he shouted urgently: "General Xiang! Oh no! The Rogue has come to attack the city!! ”