Li Shimin was a little hurt by Li Yuan's prosperity.

can talk about laziness so easily, but he found that he seemed to underestimate Li Yuanjing a little.

I experienced it alone, and I was able to pull it, but I still felt a little struggling.

The freezing of the land is only one reason, but even then it is very satisfying.

When it can really be used, two adults can pull it to work, and if you add one or two children, it will be easier.

In addition, the effect of plowing is also better than that of straight ploughing.

Li Shimin immediately decided to hand over the quyuan plough to the generals as supervisors, and after they had figured out the technology, they would come up with a detailed plan, which would then be jointly promoted by the Ministry of Household and the Ministry of Industry and directly distributed to the county.

There are still about eight months to go until the next plow, and although it is not possible to replace all the plows with curved ploughs, two years is about the same.

Of course, Li Shimin's perspective on the problem is not as simple as Li Yuanjing's.

The first thing he has to consider is the disposal plan of the old farm tools, not every family can replace the new plow, and even many people are several families share a plow, and even poorer, it is normal for a village to only have one or two plows, and every farming season, every household in the village is day and night, rushing to work.

The steps of making the plough are ready-made, and there is no need to change anything except for the replacement of all the iron except the coulter with wood.

The task of the supervisor is to find a way to transform the straight plough according to this curved plow, not to achieve the same labor-saving effect as the curved plow, at least to be better than before, and to save costs for the people as much as possible while improving the farm tools.

"You said someone was eyeing Quyuan Plow?" After deciding what was going to happen, Li Shimin began to care about another matter.

In fact, this is not an important thing, because the production method of the next curved plough will be announced, and only in this way can it be promoted faster.

Although making and selling by himself can bring a certain amount of profit, this profit is not stable, compared with the increase in grain, especially the disasters for many years, Li Shimin chose grain instead of money.

"It may be Qu Yuan Plow, it may be something else, or it may be the life of the younger brother, anyway, a dagger was found on them, two confused people who don't know why, one who half-understood, and let the contact person run away!" Li Yuanjing shook his head.

"Do you have anything like that?" Li Shimin was stunned for a moment and directly grasped the point.

A curved plough can bring such an effect, if there is anything else, Li Shimin feels that he is almost fainting happily.

Li Yuanjing nodded and said, "Yes!" The younger brother took Fang Er into the palace for this matter......"

As he spoke, Li Yuanjing's eyes couldn't help but drift to Cheng Zhijie.

Fang Xuanling's eyes showed an excited look, if this thing is not bad, I am afraid that the title of his second child will also be guaranteed.

The eldest grandson Wuji and Du Ruhui and other ministers shook their heads speechlessly, why didn't such a good thing come to their own family?

When I first played cards, our rabbit cubs were also present, and Cheng Chuliang, who was not willing to lose to you, was the first to get the benefits, which made us reasonable?

Cheng Zhijie is not red or panting, standing there like a door god, let you wind and rain, I am just unmoved.

"What's that?" Li Shimin said curiously, he is not unfamiliar with the title, the water that spills out of the words he says, as long as the thing is really good, the knighthood will be sealed.

Anyway, these are all old brothers who follow themselves to fight the country, even if they don't give them titles now, when they stabilize themselves in the future, they will find a way to give their second son, or even the third son a knight, which can be regarded as an explanation for these old brothers.

"Waterwheel!"

"Waterwheel?" Li Shimin was stunned, the waterwheel is also a new thing?

As early as the Three Kingdoms period, there was a waterwheel in Wu, and it is still in use so far, but the waterwheel is very inconvenient to use, and it often takes several big men to keep turning to get water, if you want to keep it one after another, you need at least ten big men to stay here a day, and the water intake efficiency is not high.

Somehow, Li Shimin subconsciously thought of the Quyuan plow and the straight plow, the Quyuan plow is a change on the basis of the straight plow, and the effect has been experienced by himself.

"Improved waterwheel?" Li Shimin asked subconsciously.

"Well, go to Zhuangzi and take a look at it and you will understand!" Li Yuanjing nodded.

It is difficult to be convincing without physical objects and only empty words, and a simple waterwheel has already been made, and it is a modification of the original waterwheel, so it is not troublesome.

Li Shimin was also attracted by the modified waterwheel, and wanted to see what the effect was, so he hurriedly asked the guards to prepare, and he changed into civilian clothes, and ran towards the imperial village in the east of the city with his ministers.

When I came to Huangzhuang, I saw a group of children frolicking around a waterwheel, several women were watching around, and the children were not allowed to approach the waterwheel, and the male villagers did not know what they were doing.

"Will you move on your own?" Seeing that the waterwheel was spinning on its own without anyone controlling it, Li Shimin was surprised and almost fell off the warhorse.

"Well, the principle is very simple, the waterwheel will not move by itself, because it is too heavy to push it, but the weight of the waterwheel cannot be reduced too much, so I can only find a way to deceive the waterwheel and make him feel that he is as light as a swallow, so he turns by himself!" Li Yuanjing explained mysteriously.

"Speak human words!" Li Shimin frowned, still cheating on the water wheel? Let him feel that he is as light as a swallow, you are such a cow, why don't you deceive the dead?

Li Yuanjing pursed his mouth, and secretly said that there is no humor at all, boring, boring, and stupid!

Stretching out his hand and pointing to the area covered by the tarpaulin: "Oh, that's the point!" ”

A guard ran to the shelf next to the watermill and directly uncovered the tarpaulin, revealing the core part that he didn't have time to seal, or didn't intend to seal at all.

Now he finally saw the core point, but Li Shimin was confused, the support rod in the middle was motionless, but the waterwheel outside was moving, and even saw some log-like things rotating with it.

Over the years, the craftsmen have tried to install the bearings of the carriage, but the effect is not good, so I have improved it again, and made it easier to rotate the waterwheel by borrowing force.

This is the most basic version, if the water is not enough, let two children sit on it, from time to time with their hands to turn to get water, but this kind of thing is not very safe, later plan to transform other parts, and strive to make a small child sit there and play in the inner lake pond can turn a big water wheel. "No matter how much you say, it's better to take a look at it for yourself, now the speed of the water flow is not slow, the speed of the waterwheel is also very fast, and the amount of water is very large, even for irrigation.

Nothing is more persuasive than facts, and practice is the only criterion for testing truth.

Li Shimin nodded secretly, he didn't understand the operating principle of the bearing, but he knew the benefits of this kind of waterwheel, pointed to the busy Zhuang Min and asked, "What are they doing?" ”