After the steelmaking in Dao Dao inspired craftsmen to create a high-temperature preheating blower furnace, Li Su did not intend to hide his personal interests like other technological innovations or make personal profits.

Instead, he immediately summarized the technical gains into secret memorials, and after he was about to return to Chengdu, he submitted them to Liu Bei to let the top civil and military officials know about this.

Although iron smelting is also a big business and has a certain profit, salt and iron are official after all, and iron also involves the country's military equipment and weapons construction. Since Li Su did not intend to compete for hegemony himself, he would not have been too deeply involved in this field.

This lack of in-depthness is reflected in both investment and profit. He only guides the investment level and does not know how to do it in detail; the money he earns will not be too much.

This is a measure that the prime minister should pay attention to if he does not attract fear from the monarch. Even if Liu Bei had long been used to Liu Bang and Liu Xiu as emperors for four hundred years, he would not doubt Li Su, and he himself should be cautious.

However, although he could not monopolize the benefits of new iron smelting, this time the incident was not bright in the east and the west, which reminded Li Su, making him realize a new wealth path with similar principles - that is, to improve the technology of burning porcelain.

As mentioned earlier, the difference between porcelain from primitive porcelain to complete celadon is actually the furnace temperature of the porcelain kiln. The formation of the glaze of the primitive porcelain is the iron oxide component in the porcelain body, which is continuously burned by a high temperature of about 1,100 degrees and participates in the reduction reaction.

However, the iron oxide at 1,100 degrees is not completely reduced, which forms the effect of mixing reddish iron oxide and cyan reducing elemental iron. Later generations who have adjusted RGB color mixing on computer monitors know a basic principle: mixing red and cyan can easily produce a yellowish color. Therefore, the glaze color of the original porcelain is a bright color with a little yellowish color.

If you don’t have any concepts, you can take a look at the porcelain water tanks at home for those born in the 1980s and 1990s when they were young, or the jars for making wine and pickled cabbage. Any water tank with a little smooth and bright glaze color and reflective color are basically earthy yellow. That is the color of the original porcelain in the Qin and Han Dynasties. This thing will be burned out after a low temperature of just over one thousand degrees.

There is no doubt that earthy yellow is a relatively slim color. Even if it is smooth enough and has a little reflection, it is still tall and cannot be improved. Therefore, during the Qin and Han Dynasties, the trade route that Chinese civilization exported to the outside world could only be the "Silk Road". Who made the primitive porcelain of this era too earthy and ugly?

The "Maritime Silk Road" that had been in foreign trade in the Tang and Song dynasties should actually be called the "Porcelain Road", because the export of foreign trade in the Tang and Song dynasties had surpassed silk.

Li Suneng increased the firing temperature of the porcelain kiln as the iron smelting furnace by 200 degrees. Not only can iron smelting be faster and more efficient, but the iron oxide glaze in the porcelain body can also be reduced more thoroughly. After the iron oxide is completely reduced, the porcelain glaze layer formed is completely blue.

Celadon is much taller than the original clay porcelain. First of all, cyan is closer to the color of jade. Secondly, cyan products in nature do not have cyan, so celadon is obviously a product of high-quality and fine processing. No one will mix it with clay, and the quality and recognition will also increase.

In this way, not to mention being sold overseas in the future, it will be sold to Jingzhou, Yangzhou, or the northern region of Guandong, which will be enough for the princes to pursue.

Now, whether it is Yuan Shao or Cao Cao, they use earthy porcelain bowls with earthy glaze when eating and drinking. Give him a blue porcelain with beautiful jade. Who can resist buying it?

Moreover, the two hundred-degree temperature difference between celadon and yellow porcelain is not able to be broken even if the Guandong princes can break their heads within five or ten years.

In addition, this money is entirely the income from the luxury business, Li Su is also at ease, and Liu Bei will not be afraid of him because of this, but will become more and more at ease with him:

Look, Boya spent all his thoughts on eating, drinking, having fun, and food and utensils. The tableware used for food enjoyment is more beautiful, and he can make up so many fancy things. He is really a person who can enjoy life.

Of course, in fact, if Li Su wants to break through the celadon technology and open a workshop, it still takes some time for people to slowly tinker with, improve the technical details, and overcome some small difficulties.

For example, the preheated blower furnace he just created has increased the melting temperature by one or two hundred degrees, but it has reached its limit. During the silo, the old craftsman Zhou Bing found that the blower cannot be preheated too much, because when it is close to 1,400 degrees, the current furnace furnace seems to soften - this is actually because the existing furnace building materials do not have enough fire resistance and need to develop new refractory bricks.

If there are primary refractory bricks, it is possible to break through to 1,400 degrees, even if it exceeds 1,500 or 1,600. Unfortunately, the refractory bricks in later generations seem to be divided into alkali refractory bricks and acid refractory bricks. When making iron blast furnaces, alkaline bricks are needed, and when making porcelain kilns, acid bricks are used.

Alkaline refractory bricks are high-aluminum bricks, which require certain bauxite ingredients. Li Su does not understand these chemistry knowledge. He has never taught them in high school chemistry textbooks and has already touched his blind spots. Therefore, unless the craftsmen work hard to invent the technology of doping bauxite bricks, Li Su will never see the iron-smelting blast furnace for refractory brick repair in this life.

Acid refractory bricks are very easy. The main material is silica, or it can be burned with clay bricks. It is similar to firing a certain vitrification reaction, and you can encounter this option if you touch it. In history, craftsmen in the Tang and Song dynasties themselves found refractory bricks for burning porcelain kilns, which do not require chemical knowledge.

Therefore, when Li Su let go of the natural development, he may see that the temperature of craftsmen burning porcelain can be more than 100 degrees higher than iron smelting, and it is easier to mass production and popularize it.

...

After recording all the needs of exploring porcelain burning and the general precautions that could be thought of in his mind in his small notebook, Li Su took Zhuge Liang to chat all the way, and rushed back to Chengdu.

The subsequent technical work is just for specific people to explore slowly, and he doesn't need to do it himself. Moreover, it is impossible to really produce a product without three to five months of experiments.

It is estimated that it will take the autumn of 193 that Li Su can eat and drink with green porcelain, and then give it to his friends around him. At the end of the New Year, he can almost sell it within Shu. As for exporting it to other warlords to earn foreign exchange, it was at least the beginning of spring 194.

Li Su was also very reluctant to teach Zhuge Liang some basic chemical principles along the way, such as telling him that the color change during the firing of iron smel and porcelain glaze actually has some similarities. The color change of porcelain glaze also includes the process of iron oxide being reduced. I hope to break the mystical color in Zhuge Liang's heart and make him dare to think and explore more.

In just two days of return journey, Li Su's fleet passed through Nan'an County again. Half a month passed since he headed south from Nan'an before. And just this half month, when Li Su came back again, he saw a very gratifying scene-

Leshan was actually cracked, dozens of feet high and deep, and it broke to the altitude of the Dadu River. The river water of the Dadu River was already eroded along the location of the mountain collapse and poured into the Minjiang River along the obtuse angle. Although the Dadu River water flowing through this crack only accounts for less than one-tenth of the total runoff, it is really a good start. The subsequent version is a simple repeated physical work to expand the scale, and just copy the current victory.

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Li Su’s most intuitive feeling was that when his fleet returned to Nan'an, he didn’t have to abandon the ship and land on the shore to change horses and rush back to Chengdu. Instead, a construction team sent hundreds of civilians to play a temporary guest appearance, pulling his ship through the estuary of this converging river. The power of the vortex of the Dadu River has been weaker than before. If it is completely repaired in the future, maybe even the boatman will not need it.

Zhuge Liang watched the whole time around, and was also shocked by this kind of heroic sense of conquering nature: "I have been in Shu for several years and heard from the old locals that the place where the Minjiang River and Moshui converged was as fast as the gate of ghosts. There was no ship to cross since ancient times. Today, it was conquered by Li Shi Xiu Daowei. It is really incredible."

"There are still many things you can't believe in in the future. You must be humble and keep your mind open." Li Su said a few times and said no more.

Without getting off the ship, the fleet successfully passed through Nan'an for two more days and happened to return to Chengdu.

...

As soon as he arrived in Chengdu, Li Su would inevitably report all the gains of this trip to Liu Bei, especially the progress of military production and the good blueprint for large-scale steelmaking. Liu Bei asked very carefully and was amazed.

After the report, Liu Bei took care of him a few words: "By the way, before you left at the beginning of the year, did you roughly talk about the idea of ​​"rental and mediocre adjustment method" reform? I have asked Liu Ba to draw up a specific implementation plan for more than a month, and I have already made it clear.

Thank you for your hard work, let me rest for two or three days first, and let Zichu show you the case. There is no big problem, so I will leave it to the ministers for discussion to see if there are any objections. Now spring plowing is almost the same, and it just happened to be the busiest season. Officials, gentry and powerful people should have more leisure to discuss politics."

The reform of the renting and mediocre method has been secretly piloted for a year or two in a small-scale manner, "quietly entering the village, just doing it, not saying it". Li Su also mentioned it several times. Now the time for a comprehensive tax reform is almost ripe, and it is just right to advance it to form a common law.

Li Su happily accepted the order and went home to rest for two days, accompanied his wife for a while, and then went to Liu Ba to do a serious business.

Of course, as Li Su, he definitely doesn't need to visit Liu Ba. As long as he has time, he can notify Liu Ba two days in advance to come.

Liu Ba, who had just joined Liu Bei's camp for two months, respectfully took the manuscript to the door for inspection.

Li Su asked the maid to cook tea and serve guests, and expanded the documents brought by Liu Ba to look.

In just a few seconds, Li Su realized that Liu Ba was a meticulous economic legislator, and he was the person who formulated the economic tax system of "Shuke" in history.

Although the ideas for renting and adjusting are provided by Li Su, Liu Ba sets the indicators very reasonably at the execution level, and also wrote in detail precautions such as "How to change the color of the rented grain and household transfer money, how to prevent the powerful from taking the opportunity to hoard the indicators of Qi Cards to exploit the people". Why should each indicator be priced in this way? There are small words to explain it later.
Chapter completed!