Li Ke got up from the ground with a smile, then sat down next to Li Shimin, and quickly began to sell cuteness: "Daddy, see if I'm doing a great job!" ”

Li Shisheng was given goosebumps by Li Ke's "Daddy", "Can you talk well?!" Li Shimin leaned back with a disgusted face.

"Cough, Dad, you just say, is it useful for the son to reward the craftsman!" Li Ke began to make a gesture.

"This was also developed by craftsmen?" Li Shimin's expression was also a little more serious.

"Yes, the road is just a concrete road made of simple cement mixed with gravel sand, although it is not as hard as stone as a whole after long-term use, for example, according to decades of history, but it is more malleable, and it is easier and faster to repair, and it can become hard in twelve hours."

"In addition, if the reinforced concrete formed by it is built on the Yellow River after adding steel bars to its interior, it is really possible!"

"And the city wall built with it can't be shaken even by a large stone thrower!" Li Ke said very seriously, "At present, Erchen is still developing a way to speed up its production, if the craftsmen make progress in this area, the cement output increases, Dad, can you imagine the effect of all the official roads in Datang after they are paved with cement?" ”

All the official roads of Datang?! Li Shimin was a little enthusiastic by Li Ke's words, the official roads of the Tang Dynasty are all dirt roads, once it rains and it is muddy, in addition, the roads in many places are uneven, and the carriage is extremely difficult to walk, but it is still the best road.

If all the roads are built into concrete, there is no need to worry about rain or snow, and the roads are extremely smooth, and the consumption of materials for transporting food can be reduced by at least 30% for the same section of road.

From here to Jiuquan, Dunhuang and other places in Longyou Road, the time is estimated to be at least ten days in advance.

Similarly, Datang's strategic goals are naturally different.

"You, that's a good job." Li Shimin nodded with satisfaction, don't look at Li Ke making trouble, but Li Ke is really doing things, "By the way, your craftsman who recruits a blacksmith shop with ten times the salary, can you hold it?" ”

"You can hold on, Dad, don't worry." Li Ke said with a smile.

Seeing Li Ke's smile, Li Shimin had a bad premonition, this kid ...... Won't you dig a pit for the eldest grandson Wuji and the others again, right? It's just that Li Shimin can't say anything, he didn't interfere in this matter from the beginning, which means that he won't interfere unless the matter is stabbed in front of him.

"You came here today, do you have anything else to do besides pleading with me?" Li Shimin looked at him and asked.

"Yes, Erchen wants to start promoting Quyuan plow." Li Ke opened his mouth and said, he had mentioned the role of Quyuan plough before, although Li Shimin did not come to ask, but the promotion of this matter must be greeted by Li Shimin.

"Oh? This is a good thing, what does it take me to do? Li Shimin instantly thought of Li Ke's large-scale recruitment of blacksmiths and craftsmen, what is this kid waiting here?

"I don't need you to do anything, just tell you, because the promotion of Quyuan Plough is definitely not something that can be completed in a short time, so Erchen has to say hello to you in advance." Li Ke said without changing his face.

Li Shimin narrowed his eyes and greeted me in advance? This is something to say, of course he knows that the Quyuan plough can not be promoted and completed in the first time, although the plough used in the plough is only the plow is iron, but the pig iron consumed by the entire Tang Dynasty is still a huge number, which can not be completed in a short period of time.

That's right, only the ploughshare part of the plough in this era was made of iron, and the ploughshares on both sides were polished and inlaid with wood, because there was really not so much iron, unlike the entire plough in later generations that were made of iron.

Especially the Tang Dynasty has been fighting abroad, and a large number of iron tools have to be used to forge armor, and even fewer can be used for people's livelihood.

But Li Shimin didn't ask, he just said that he knew.

"By the way, Dad, there is one more thing, I now have my own blacksmith shop, so I decided to give my own guards those forging bright light armor, so as not to occupy the treasury and consume, don't say that I rebel." Li Ke said hello to his father first.

Li Shimin: "......" If Lao Tzu was afraid that you would rebel, would he take the initiative to give you Mingguang armor before?

However, Li Ke wanted to forge it by himself, and Li Shimin didn't care, he directly waved his hand and dropped a sentence "Lao Tzu knows, get out of here" to signal that he knows, although the armor is forbidden to be owned by the people, Li Ke is naturally not a prince. What is the use of rebellion with armor and no one?

Leaving the palace, Li Ke didn't do anything else, just asked Tian Meng to prepare, and five days later, with the release of the next issue of Datang Daily, he was ready to start selling the plowshares of Quyuan ploughs and other iron tools.

In fact, since the pig iron began to be smelted on a large scale, Li Ke's construction has not stopped, and the plowshares of the Quyuan plough have been being built, in addition to the plowshares of the Quyuan plow, it is the Mingguang armor that has been being built.

The only difference is that the armor used on the Mingguang armor of the Tang army is iron sheets, but all the armor used by Li Ke here is steel plates! Li Ke's steel sheet is different from Datang's die forging, he directly molds and cuts, although his hydraulic device is very simple, but there is no problem in cutting about 3 mm thick steel sheet into long strip armor.

3 mm Many people think it is thin, but in fact, the thickness of the pig iron armor of Datang Mingguang armor is only about 2 mm...... It's already super strong.

There are a lot of scraps after such cutting, but it doesn't matter if there is scrap, Li Ke's scrap can be re-fired into shape, and then extruded into an iron plate of this thickness, cut again, and punched by a simple machine tool.

In fact, this thing is already the most superficial manual machine tool, including the hand grinding wheel used to polish the edge of the nail piece.

Even if it is a superficial industry, it is also an industry, so the speed of the Mingguang armor forged by Li Ke himself should not be too fast, in addition, Li Ke has also partially improved the Mingguang armor, there are two round plate armor iron plates on the left and right chests of the Mingguang armor, which is the main protection area, in fact, in Datang, it is not easy to build the plate armor protection area with a large bowl mouth, and it is also the most expensive part of the Mingguang armor.

And Li Ke is stamped and formed here, and the plate armor on both sides of the chest is made into a shape similar to the rib area of a person, only slightly smaller, which increases the protective area without affecting the action, and in addition, a plate armor is also added to the abdomen to increase the protective area.

The nail plate on the back is enlarged to form a unified protection area, all the nail pieces are passed through by the leather rope, and the inside is a layer of raw cowhide to avoid abrasion, and the raw cowhide should be lined with sheepskin.

It can be said that Datang does this work, the slowest work is to create nail pieces, but here in Li Ke, the slowest is the sewing work, but Li Ke has a large number of women here who are also working, so the sewing speed is not slow.

Mingguang armor Li Ke is actually building very fast here, and in half a month at most, all the 2,000 guards under his name can be replaced with new Mingguang armor.