Datang Industrial Zone, a separate courtyard surrounded by 500 full-body Mingguang armor guards, this courtyard covers an area of about 1,000 acres in size, and there are various factories and equipment inside.

At its entrance hangs a plaque, Datang Academy of Science and Engineering.

The plaque was written by Li Ke, but unfortunately Xiao Jinyang was still too young, and when Xiao Jinyang grew up, let her imitate Lao Li's handwriting and fly white with one hand, which is said to be true with fake.

The courtyard is two meters high, and it is strictly forbidden for anyone to visit it, and of course, the entire industrial area is protected by guards on the perimeter and even on the inside.

At present, there are a total of 1,372 craftsmen who have been working here for a long time, and a considerable number of these craftsmen have gradually taken refuge in Li Ke after they were dug from various households after Li Ke's monthly income increased.

And all the craftsmen on the periphery are proud to be able to enter here.

It can be said that the people who work here are really craftsmen, there are no apprentices, and those who work are real craftsmen, in addition, there are a group of people in each factory who are specially trained, and they are trained in accordance with the way of the eighth-level fitters in later generations.

As for why these people are trained, the reason is also very simple, before the industry reaches a certain level, in fact, the accuracy of human manual work is much higher than that of machinery, even after more than a thousand years after 2020, in many industries, machines dare not say that their accuracy can exceed 100% of manual.

Therefore, these people are naturally trained in order to prepare for the first batch of industrial machine tools in the future.

The purpose of the craftsmen here in the Academy of Engineering is much simpler, mainly to develop and improve.

When Li Ke arrived, the craftsmen led by Lu Daqiang and Liu Chang were already waiting in line here.

"Your Highness."

"Your Highness." His Highness was full of fanaticism, and these craftsmen knew better that compared to His Highness, they were nothing.

"How? Tell us about your achievements? Start with Liu Chang. Li Ke asked with a smile.

Liu Chang mainly made the Quyuan plough before, the Quyuan plough could not have been developed by Liu Chang, Liu Chang himself understood this, but His Royal Highness needed him to stand up and bear this honor, Liu Chang also knew very well that he was the example that His Royal Highness set for the world, so Liu Chang has always been very attentive, and he wants to make his efforts worthy of the trust given by His Royal Highness.

Of course, it cannot be ignored that Liu Chang is a real master of the carpenter industry, in fact, like Lu Daqiang, both of them can be regarded as masters in the carpenter industry.

In ancient times, there were many masters from all walks of life, but almost all of the truly powerful masters were in the field of carpenters. It may be because carpentry was used in almost all fields in ancient times, so carpenters are also the most truly awesome masters.

"Your Highness, the seeder you handed over to us has been successfully developed." Liu Chang first reported his first achievement.

"Oh? Check it out. Li Ke immediately looked curious, there were a large number of basic farm tools in the library he got, but most of the basic farm tools were made of pig iron and even steel, which was not applicable in Datang.

The external environment of Datang is not stable, so steel must be the first to make weapons, there is no doubt about this, even Li Ke can't change these now, and some of the agricultural tools that can be cast from a large amount of wood with a small amount of pig iron are the most fundamental.

In fact, as early as the Han Dynasty, the early prototype of the seeding machine has been born, and even in the seventies and eighties more than a thousand years later, the main cultivated land area with a relatively large amount of farmland in the north used the seeding machine, which is more than the Han Dynasty...... In principle, it didn't go anywhere.

It is only a partial improvement in the transmission and materials.

Liu Chang took Li Ke to the front of this improved seeder, Li Ke saw it, and the appearance alone evoked his memories when he was a child, and the seeder that Li Ke used when he was a child was very similar to this thing.

Li Ke remembers that the seeder in his previous life when he was a child was not big, that is, it was wider than a mule, with five legs, the wheels on both sides of the seeder were iron, the chain was driven, and then the top was a rectangular square bucket, in which the diamine and wheat seeds that were poured into it as the base fertilizer were mixed together, and then poured into the square bucket together to sow seeds.

The five holes below the square bucket correspond to five hollow sowing legs, and the middle of these five holes is a groove thread similar to that of a waterwheel, which can be twitched laterally, and the groove size inside is different, and the groove size is used to adjust the number of seeds sown by rolling a roller.

There is no groove thread under the square bucket of Datang's cocoon car, so there are no rollers on both sides of the cocoon car, so it is easy to cause too much wheat at a time, or too little, not so uniform, and in fact most of the time is too little.

In his previous life, Li Ke's grandfather told him that when they were young, the seeder was called a cocoon, and when they sowed seeds, they had to shake it, because if they didn't shake, many times the seeds would get stuck together, after all, the hole couldn't be left too big.

Moreover, there are no wheels on both sides of the cart, which is also very labor-intensive. The kind of improved iron that Li Ke saw when he was a child, his grandfather also called it Tie Cocoon, so you can imagine how many years this title has been used.

At present, the seeder that Liu Chang and the others have transformed is very close to the seeder that Li Ke used when he was a child.

"Your Highness, we have tested this seeder several times, first of all, the wheels on both sides of it, we still use mold-forged pig iron wheels, and then the bearings in the middle of the wheels are installed with this seeding groove, and the grooves are also made of iron, and the size of the grooves is fixed by us."

"We have tested what Your Highness said, the way that the middle groove bearing can be twitched left and right to change the size of the groove, but it is a bit complicated, it is very difficult for our production process, and the failure rate is very high. So we made it fixed, so that there is no need to replace, its structure is much simpler, as for the number of seeds, we choose to set up a piece of wood at the entrance of this seed hopper, and adjust the size of the seed inlet to adjust the number of seeds of different crops such as wheat. Liu Chang gave an introduction.

Li Ke nodded with satisfaction, the plan he provided to them may be very advanced, but the advanced should consider the actual situation, Liu Chang They did a very good job, this is very good by narrowing the seed entrances and exits, reducing the difficulty and failure rate of the entire seeder.

Although this way of jamming the wood chip baffle, because the seed mouth will be buried at the bottom with a large number of seeds when sowing, sometimes the wood chips are not stuck properly, and they will close themselves and other small defects.

But this small defect is not a big problem, because the back of the seeder will follow people, and one of the five sowing legs will be empty, and a part of it will be left empty in the middle from the top to the bottom, just to let the people behind observe whether there are seeds falling.

It's not that it can't be done, but it's deliberately left empty.