Li Shimin and others immediately stepped down from the stage to watch it in person, although Li Shimin didn't understand this, but there were people around him who understood.

The roller's once compression of the ground is not particularly good, mainly due to the weather and the fact that the weight of the roller itself is reduced, so it needs to be rolled repeatedly.

However, this did not affect the final outcome, and after the first crush, there were some places on the ground that were not particularly smooth, and there were even pits.

This needs to be filled artificially, and it doesn't need to be too delicate, just dig a pile of soil and throw it into the pit, and then the roller will run over and over again until the road surface is completely smooth.

In fact, according to the current level of technology, it is impossible to build a particularly flat road, without that condition, and there is no need for that.

The most important thing about building a road is the roadbed, and there are two elements of building a roadbed, cooked soil and tamping.

Cooked soil is not only used to build roads, but also when building a house, otherwise the house will be hollowed out by various insects after not living for a few years.

Therefore, don't think that the loess house is easier to repair, but just use loess and straw to build up, if you really get serious, the construction cycle of a loess house is not shorter than that of a brick and concrete house.

"Even if this step can increase the speed, it will take a lot of time to turn over the ground, right?" Li Shimin asked suddenly.

"Father, it's true, but Erchen already has a plan, he can use an excavator instead of manual labor, as long as the digging can keep up, it will take a month at most to complete this thing." Li Chengqian replied truthfully: In the past, this was indeed a big problem, but now it is not difficult.

"Cooked soil? No, there's a better way why not? Cheng Chuliang was stunned and looked at Li Chengqian suspiciously.

"What better?" Li Chengqian was also stunned, why don't I know there's a better way?

"That's right! Don't you know? ”

"If this palace knows, what are you asking you for?" Li Chengqian looked confused.

"Yes......" Cheng Chuliang suddenly reacted, he probably really didn't know, and then said: "Sprinkle white lime directly, this thing will die no matter what worm is thrown in within two days, and we have tested it before, and the effect is very good, it is said that it also has a moisture-proof effect, and it is the most suitable for building roads, so we plan to launch two professional machines." ”

"And?" Li Shimin couldn't help but be a little surprised, is this a research machine or a road construction? How can they know better than the imperial court?

"Yes, this is multi-functional, and it's not a novelty, it's a plow and a flat thing, similar to a rake, but this is a special device to install it on the car, this is a good thing, Your Majesty think about it, after the road is repaired, these two things can be driven directly to the ground to plow the flat ground, and the speed Your Majesty has also seen it, if you use the previous way, it will take half a day to finish these jobs, right? What now? I can't use the tea effort. Cheng Chuliang boasted without hesitation.

“？？？” How could Li Shimin not see Cheng Chuliang's careful thoughts? Directly asked: "How much does it cost?" ”

Cheng Chuliang, who was seen through by Li Shimin, was not in a hurry, but continued to say steadily: "Your Majesty, don't look at this thing, it's not complicated, in fact, there are many things in it, at present, this is just a preliminary idea, I have studied it before but it has failed, it is much more difficult to do than these things, and there are many things that need to be built separately, and other issues need to be considered......

"I ask you how much!" Li Shimin is a little impatient, there is no need to say more about the efficiency of mechanization, Li Shimin knows better than anyone else that iron ore is a living example.

The more ruthless Cheng Chuliang blew, the more Li Shimin felt that this product had to be opened widely.

"These three plus those two, the five-piece set has a total of 100,000 guan, if you only need those two, 50,000 guan, it is really too difficult to technically, and it is not easy to build."

"Don't give me nonsense, do you really think that little Jiujiu in your heart doesn't know? Cost? You've got a fart cost! Hearing Cheng Chuliang's offer, Li Shimin instantly pointed at Cheng Chuliang angrily and scolded.

Where does your special excavator workshop cost come from?

All orders are official orders, and because of this, the iron material is also officially given for free, how many things have you secretly done in private over the years, do you really think others don't know?

It's just that others don't want to pursue it, and one gives you a processing fee of 51,100 yuan, and he doesn't make a small amount of money except for labor or something, although the number is not much.

But now you dare to open your mouth to ask for 100,000? 20,000 per unit?

In the face of Li Shimin's angry scolding, Cheng Chuliang was a little frightened, but when he thought that it was all money, and even if he repaid it now, it was not to talk back to Li Shimin, but to return the favor according to the national policy formulated by the imperial court.

"Your Majesty, this account is not calculated like this, after all, the previous policy of the imperial court is not the same as the current policy, just to say that this steam engine, although it was made by King Zhao, but we can't expect King Zhao to take it out for free for us, right?

If we want to use this thing, then we have to take the money to buy it from King Zhao, this thing is currently no one in the entire Tang Dynasty except King Zhao, and how much time and how much money King Zhao spent on this thing, although Your Majesty may not know, but you probably know something, right?

I asked King Zhao before, just such a little guy, King Zhao's reply is that it depends on the situation, the initial output is low, maybe three or five thousand yuan, and the price will be reduced when the output comes up in the later stage.

You see, a machine is so much money, we still have to invest manpower and material resources to research, to produce, and to feed so many people, the miscellaneous costs are more than 10,000 yuan, and we also have to pay taxes, according to five sets of 100,000 yuan, this five-piece set will pay more than 3,000 yuan in taxes, and we will earn 20,000 or 30,000 yuan at most.

And do you want to continue to be more advanced in the future? What do you have no money for? I don't spend any of the money I can't earn, and I use it all for this, right? So what's the point? Speaking of this, Cheng Chuliang quietly glanced at Li Shimin, although all this was his nonsense according to Li Yuanjing's explanation, although he was also frightened, but after seeing Li Shimin's expression, he was still relieved.

Then according to Li Yuanjing's explanation, he released another big killing move: "Your Majesty, it's different now than before, in the past, as long as the court gave an order, even if you didn't have money, you could do a lot of things, after all, everyone is poor, and they are all used to it, at most they just scolded twice behind their backs."

Now that we have money, not only do we have money, but we also want more people to have money, so that we can show Your Majesty's talent in governing the world, so now we have to ask for money no matter what we do, we don't spend money, how can we drive the development of other industries? If other industries do not develop, what is the use of the layout of the imperial court? Everyone doesn't spend money, where can the court get taxes? ”

Li Shimin nodded secretly when he listened, although the truth is this.

But......

"I will talk to King Zhao about the steam engine, and you don't have to worry about the price of iron, so this price is absolutely not okay now!"