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After a busy night, Li Su got up early the next morning and waited outside Li Shimin's palace, and when he arrived, Li Tai and the eldest grandson Wuji were already waiting outside the door.

"Fourth brother, elder grandson!" The hypocrisy and grievance of officialdom Li Su is now very proficient in practice, although he doesn't like the two of them, he still greets each other with a smile.

"Your Highness Six!"

"Rokuro!"

The expressions of the two were more sincere than Li Su, which made Li Su secretly say that he had to continue to hone.

"Hey, Rokuro's face is not good, but he didn't sleep well last night?" After greeting each other, Li Tai asked with a concerned look.

Li Yu smiled and said: "I dealt with some temporary government affairs last night, the fourth brother and the eldest grandson pavilion were tired for a long time, and they were satisfied with the rest last night?" ”

"Satisfied! Satisfied! The eldest grandson Wuji said with dark circles under his eyes, last night several people talked about going to bed very late, and when they got up in the morning, they all had a look on their faces, and fools could see that they didn't sleep well.

Li Su smiled silently, since entering Yizhou City, their every move was under the supervision of the secret guards, and every move was under Li Su's control, and they used such a little trick in Yizhou, and they didn't look at whose territory this Yizhou was.

"Liulang is really diligent and loves the people when he is busy until late at night, which makes the fourth brother embarrassed, by the way, Liulang, this is not cement." Li Tai pointed to the gray ground on the ground, which was concrete, and he wanted to ask last night, but Li Su kept talking to Li Shimin, and he didn't interject.

Li Su said: "Exactly, this is the role of cement, which can harden the land, even if it rains, it can also maintain a hard road, making it more convenient for cars and horses to pass, and there are still several sections of roads under construction near Nanshi in Yizhou." ”

Li Tai and the eldest grandson Wuji glanced at each other, and their hearts were shocked, before Li Su came, he asked the guards to test the hardness of the cement floor with a sword, and the guard swung it down, leaving a shallow mark on the cement floor, but the guard's blade was also rolled.

"What is this cement made of, and why is it so hard, the fourth brother really doesn't understand, and I ask Liulang to solve it!" As soon as his words fell, the door of the palace opened with a "squeak", and then Li Shimin walked out.

The officials waiting outside immediately bowed and saluted, Li Shimin waved his hand, looked at Li Su with a smile, and said, "Su'er bothered, this palace committee is really good." ”

"As long as the father is satisfied, the son will be relieved." Li Su said proudly.

Nodding with satisfaction, when he was on the road last night, he told Li Su that he was going to see what Li Su had made today, and said, "Su'er, lead the way, and let me see what other interesting things you have." ”

Li Su nodded and said, "Father, please come with me, this is the first thing that the son asked his father to see is the cement road under his feet." ”

Li Shimin had already experienced the magic of cement when he entered the city, and he was also curious about the smooth and hard road under his feet.

Li Su led the team of the southern tour to Nanshi first, where the craftsmen were playing cement, cement, sand, and stones piled up a lot, Li Su took Li Shimin over, the craftsmen immediately stopped their work and stood aside respectfully, Li Su stepped forward and grabbed a handful of cement and said to Li Shimin: "Father, this is cement, mixed with water, sand and stones, several things are mixed together, three or four days later, the hardness is the same as the road just now." ”

Li Shimin looked at something like flour, a little incredulous, and he looked at a few slaves who were mixing concrete, "This road surface is so hard, just rely on it?" ”

"Yes Father, don't underestimate it." Saying that, Li Su went to the place where the concrete was mixed, picked up a few condensed hard blocks and returned them to Li Shimin, and said: "Father, please see, this is the cement block that has not been solidified for a long time just now, it is not hard enough, but after a few days, it is difficult to cut even a sword." ”

Li Shimin took it, and it took a lot of strength to knead the cement block into powder, and he couldn't help but nod.

Seeing the cement pavement, Li Su took Li Shimin to the kiln factory to watch the firing process of cement, as well as the manufacturing process of sintered bricks.

After seeing the kiln factory, Li Su then took Li Shimin to the granary, which was built on a relatively high hill, surrounded by a wall, and guarded by guards day and night.

From a distance, Li Shimin saw more than a dozen cylindrical objects, and when he got closer, he realized that these buildings were very tall, and they were all built of cement and sintered bricks.

"Father, this is the granary of his sons." It stands to reason that this grain is Li Su's private and has little to do with the imperial court, but Li Tai and the eldest grandson Wuji both expressed great interest in their words, and Li Shimin also wanted to see it, so Li Su brought them over.

Li Su waved his hand, and a guard immediately ran over and opened the door made of steel, and the whole picture in the granary was also seen clearly by everyone, only to see that in the granary up to ten meters high, the wheat stretched from the door to more than ten meters to the end of the Lancang, piled up like a hill, which was shocking, and the eldest grandson Wuji and Li Tai were surprised at the moment.

Li Shimin was overjoyed after being surprised, he went into the granary and grabbed a handful of wheat from the ground, and praised: "This wheat is round and full, and the grains are very large, which is better than the wheat collected near Chang'an." ”

The eldest grandson Wuji nodded and said, "Yes, Your Majesty, if the entire Tang Dynasty can grow this kind of wheat, wouldn't it be a blessing for all the people." ”

Li Su really wanted to kick the eldest grandson Wuji's ass, the seeds of 20,000 acres of land made him tired to death, and he was still planted in Datang, then he didn't have to do anything, he was professionally engaged in transportation, Li Su's original plan was just to ensure the grain planting on his field, not to mention that it was a little difficult to supply Datang, even to supply Yizhou, his next plan was to let the people of Yizhou use the wheat he harvested as seeds, and the wheat seeds he bought were high-yield seeds, not hybrids. Therefore, these wheat can be used as seeds, who said that the effect is definitely not as good as the first generation of seeds, but it is still much stronger than the seeds of the Tang Dynasty.

"What do you think?" Li Shimin said as he stared at a warehouse of wheat.

Li Su said: "Father, the idea of the eldest grandson is right, but it is unlikely, the reason why the wheat on the field of Su'er can be harvested up to seven stones, the reason is not only the wheat seed, but also the abundance of fertilizer, the fertility of the land, the convenience of irrigation, coupled with careful care, which makes the yield per mu reach seven stones." ”

"Rokuro's words are true, but you can't ignore the factor of this wheat seed." Li Tai interjected.

Li Su said indifferently: "If you don't believe it, the fourth brother can bring a batch of wheat when he leaves, and it will naturally be visible when the harvest comes." Li Su's words are the truth, the high yield of wheat lies in the management, sufficient water and fertilizer can be high-yield, seeds are only one of them, if this batch of seeds is planted according to the natural growth pattern of the Tang Dynasty, it would be good to be able to harvest two or three stones.

Li Su's frankness made the eldest grandson Wuji and Li Tai confused, is it really as Li Su said.

Li Shimin pondered for a while, and then said, "Let's go and see elsewhere!" ”

……

In the next few days, Li Su took the officials to see the coke making, and carried out an on-site steelmaking demonstration, and let everyone see the movable type that was rushed out, this movable type is the original clay type, not the printing plate of Li Su Printing Workshop, but even this also opened Li Shimin's eyes.

After five days in Yizhou, Li Shimin inspected Yizhou for five days, and after seeing the skills in these workshops, he went around the counties and villages.

After returning from Yangshu Village on this day, Li Shimin called Li Su to the palace, "You should know the reason for my father's southern tour of Yizhou this time!" ”

Li Su nodded: "They are nothing more than jealous of the skills that their sons got from Luo Anguo." Then Li Su took out a booklet, "Father, this booklet records these skills, and the son is now dedicated to you!" ”

Li Shimin took the booklet: "None of this is important, I want to ask you where this Luo Anguo is?" Can Datang and this Luo Anguo trade with each other? While Li Shimin was shocked to see these skills, he also became more and more interested in Luo Anguo behind Li Su.

After more than a year of swaggering and deception under the guise of Luo Anguo, Li Su had a premonition that one day Li Shimin would ask about it, because with the import of more and more modern items, his impact is also getting bigger and bigger, and what he is struggling with is how to answer Li Shimin's question smoothly.

"Father is not just you, I'm afraid many people in the court think so, but forgive the sons and daughters for being disrespectful, please ask the father, why didn't the Tang Dynasty take the initiative to trade with the barbarians in Yizhou."

"Hmph, how can those barbarians who drink blood and don't listen to education be worthy of trading with the Tang Dynasty." Li Shimin said disdainfully.

Li Su smiled and said: "That's right, how does my father think of the barbarians in the deep mountains, this Luo Anguo is how he views the Tang Dynasty, for them, the Tang Dynasty doesn't have anything they need, why should they come all the way here." ”

"Arrogance, the Tang Dynasty is the kingdom of heaven, and all countries come to ......" Li Shimin was furious, his face was purple, and it was very terrifying, but he just said half of it and fell down, all kinds of things and skills brought by Li Su were enough to prove it, thinking of this, he couldn't help but snort coldly and stopped talking.

Li Su secretly breathed a sigh of relief, and then said: "If it weren't for Erchen who had saved a merchant from Luo'anguo, they wouldn't have disdained to associate with Su'er at all, and it was precisely because of this that Su'er could get some inferior skills and commodities from them, Erchen knew that they looked down on Erchen, but Erchen still endured humiliation and flattered them in every way, in order to get some skills and commodities that were beneficial to Datang, but even so, Erchen was still suspicious of the courtiers, and one by one he was like a hungry tiger and wanted to eat Su'er, and so, Su'er is convenient for Luo Anguo to break off contacts, and everyone has been clean since then. At the end, Li Su was already in tears and very sad.

Li Shimin hurriedly said: "Don't be rash, although my father is also angry with the arrogance of this Luo Anguo, but I have to say that their skills are really useful to the Tang Dynasty, when Jieli took advantage of the unstable throne of the emperor, led 300,000 troops to besiege Chang'an, and the father endured humiliation and gave him money in exchange for a few years of peace, and finally didn't destroy him, now this Luo Anguo is just like Jieli back then, you should also endure humiliation, after all, it is beneficial and harmless to the Tang Dynasty. ”

"Yes, father, the son originally wanted to get these skills from Luo Anguo and slowly study them in Yizhou, and turn this Yizhou into a port for exchanges with Luo Anguo, Yizhou is prosperous, and skills and commodities will naturally be transported to other places in Datang, which is called radiation economy."

"Radiation economy?" Li Shimin repeated.

"Yes, just like this torch, the flame in the center is bright, and the light can shine far away, Erchen is preparing to build Yizhou into the center of this torch, and use this flame from Luo Anguo to illuminate Shu first, then to the north, and then to the entire Tang Dynasty." Li Sukang made a general statement, and his words were not shocking and endless.