Li Shimin realized the importance of this new material, so even the personal eunuch Wang De was driven out.

There was no one else left in the study, only the two brothers.

Without outsiders present, Li Yuanjing didn't have so many fears, he sat directly on a chair and poured a glass of water with his own hands, Datang's tea was really unaccustomed to drinking.

Li Shimin didn't care, but sat on the side and waited quietly.

"I call this thing cement, the biggest advantage is that it is not afraid of water and fire, as long as the foundation is deep enough, even if the flood submerges the entire section of the city wall, it will not have much impact on him. Whether it is military or civilian, this thing has a great role.

After it is built all at once, it can be repaired for ten years, even in wartime.

Quyuan plough and waterwheel, there have been many people outside have been made, those things don't matter, it is something that benefits the people, but cement is different, it must be used in the military in the early stage, if this thing is leaked, it may have some impact, but if the formula and production method are leaked, then the problem is big, when cement is everywhere, the royal brother thinks about it, how many articles will the family do with the help of cement?

Therefore, for the person who invented the militaristic weapon of cement, the royal brother must be rewarded heavily, at least to a county duke!

The early investment is coming out, I can manage it on my behalf, and when everything is on the right track, the royal brother can send someone to take over. Li Yuanjing said quietly.

The monopoly of the imperial court is the fundamental way to avoid the leakage of the formula.

Anyway, except for the imperial court, as long as there is cement anywhere, it must be that the formula has been leaked, and if it is caught, it will be punished, even if it is a family, it will not dare to be so crazy.

"How much does it cost?" Li Shimin was thinking seriously.

He felt that it was very necessary, and what Li Yuanjing said was also very reasonable, the military strategy of the Tang Dynasty continued the strategy of thousands of years, and it was mainly based on defense, so a strong city was indispensable.

However, the rammed earth city needs to be renovated in a few years, and in the event of war, it is likely to be rebuilt on a large scale, and the rammed earth city wall is most afraid of rain and snow, and the northern city is almost renovated every year, which costs a lot.

"Cost is labor!" Li Yuanjing said directly that he didn't plan to take a kickback on this, so there was no need to lie about the cost, and continued: "The raw materials needed are a stone called limestone, clay, iron ore, and black stone, firewood can also be, but the effect is not as good as black stone." ”

Li Shimin nodded secretly, this cost is completely acceptable to the imperial court.

Limestone Li Shimin knows, clay is more familiar, and Heishi also understands it, but no one uses it.

These three things don't need to cost at all, you only need to approve an excerpt by yourself, and you can directly enclose the land.

The cost of labor depends on how to operate, and if you are ruthless, the court can even operate without paying a penny.

"What are you going to do?" Li Shimin thought about it for a while, but decided to ask Li Yuanjing's opinion.

"It must be a good family, and it is better for those who enter it to be exempt from servitude, to be fed and sheltered, and to be paid according to their output." Li Yuanjing expressed his considerations.

Li Shimin frowned tightly: "I'm afraid that this kind of treatment will not be able to find a second home in the entire Datang." ”

"If you want to keep it secret, you must give generous treatment, these investments are only upfront, and when the output comes up, you can export some appropriately, self-sufficiency is not a problem, and when everything is on the right track, you can expand the scale, or open new workshops in other places, and then you can bring a steady stream of income to the imperial court." Li Yuanjing kept painting flatbread.

Li Shimin has now been driven crazy by money, and the best way to solve the financial problems of the imperial court is to reduce the cost of open source, which has already been done, but open source has not been able to find a way out.

Although Li Yuanjing's suggestion is tempting, there are deeper issues in it that are worth discussing.

"There is no precedent for the imperial court to do business, and this matter is not easy!" Li Shimin shook his head.

"You can think about it another way, isn't the purpose of the imperial court doing business just to make money?" Li Yuanjing smiled, it is normal for Li Shimin to have such thoughts, even if he is a staunch reformer, he does not dare to mention letting the imperial court do business now, and he will not even think about it.

"You can't lose money, can you?" Li Shimin didn't have a good airway.

"It's vulgar, it's just to make money, and it's about high-end righteousness, which is to create wealth for the people and fight for the people!"

"For the benefit of the people?" Li Shimin frowned, can he still fight for the interests of the people in business? This is probably the funniest joke I've ever heard in my life, right?

"Take farming as an example, Quyuan plow, waterwheel, if these two things are fully put into use, it will inevitably increase the grain output of Datang a lot, but this is far from enough, I plan to let Du He to study a fertilizer to improve the fertility of the land, on this basis, so that the output of the land continues to increase.

Assuming that in the past, one acre of land could only produce one stone of grain, then now it can produce two stones of grain, and after the extra stone of grain is put into the market, the price of grain of 300 yuan will drop to 200 yuan, and it is always okay to drop it to 250 yuan in a short period of time, right?

If we persist for five or ten years in a row, we will have a bumper harvest every year, and there will be so much grain that we can't eat enough, and it will only be a matter of time before the price of grain drops to less than 50 yuan.

Grain can be operated in this way, and other industries can also be operated in this way......" Li Yuanjing explained with a smile.

Li Shimin's pupils contracted violently, and his heart was pounding and pounding: "You want to use this way to deal with the family?" ”

"That's right!" Li Yuanjing admitted his purpose very shamefully, and told Li Shimin that these were not to pretend to be coerced, but to gain Li Shimin's support, if Li Shimin did not support it, no matter how much he did, he could only be blind.

"I want to recruit some craftsmen for such a simple thing, the family has to make it bad in secret, if I want to do something else, they still have to trouble me every day? Actually, I'm a very simple person, live the life I want to live, comfortable, free, I don't want to provoke others, and others don't come to me for trouble, but you, brother Huang, are still reviewing and reviewing the folds so late, anyway, I can't stand it, put me in your position, I will definitely be hung up by Wei Zheng for criticism......" Li Yuanjing laughed and joked Li Shimin.

"Let me think about it!" Li Shimin nodded, not caring about Li Yuanjing's jokes.

"Brother Huang, think about it slowly." Li Yuanjing is not in a hurry, anyway, he has to do a lot of preparations, and he has time.

"Hmm!" Li Shimin nodded, and then said: "You first build a section of the city wall in Zhuangzi, and when it is finished, I will go over and take a look for myself." ”

Seeing is not believing, and Li Shimin is not very easy to decide, he plans to press this matter for the time being, and then decide whether to do it or not after seeing the real thing.

However, Li Yuanjing proposed to attack the family by commercial means, and Li Shimin was still very interested in this idea.

Crack down on their influence in officialdom through the imperial examination, and hit their finances through commerce, then now only the land aspect is left, but if there is enough grain in the world, the price of grain is enough, and the people can afford to eat and eat enough, the land in the hands of the family is not important.

"Civilian or military?" Li Yuanjing asked.

"Military!" Li Shimin didn't think about it, and replied directly.

"The military has some trouble, give me a hundred blacksmiths and ten thousand catties of iron!"