received information from Li Chengyu about Tibet, Li Chen was warm, this Chang'an, the weather was getting cooler day by day, and Li Chen was wearing long sleeves. Pen "Fun" Pavilion www.biquge.info but he's hot right now.

After receiving this information from the Ministry of War, Li Chen flipped through it, and the income was limited, and it was all something that was passed on by word of mouth from the herdsmen, so he could only be sure that the two sides were ready to fight. According to the news from Liu Meng, the border patrol envoy, the time was ripe to send troops to recover the Hehuang area.

When he talked to Li Deyu at the beginning, he said that if you want to stand up, Tubo is a very good choice. Tubo has long been a confidant of the Tang Dynasty, and being able to recover the Longxi area is definitely a great shock to the feudal towns.

Princess Wencheng, to be honest, her marriage to Tubo is the gospel of Tubo and the disaster of the Tang Dynasty. It's better for you to take the Four Books and the Five Classics with you, and educate some of those natives. Anyway, that thing, it's useless. It is of little use to Tibet. You brought a lot of craftsmen to introduce some advanced technology into Tibet, in addition to fattening Tibet and making them a problem for Datang, what other help did it help?

Not to mention, he didn't have the idea of selling his daughter to keep the peace. Even if he wants to get married one day, he will definitely not let advanced technology leak out again. I am afraid that my daughter will endure hardships, so I will give them gold, silver and jewelry every year, all kinds of silk and satin, all kinds of luxury goods, and raise them from top to bottom of the royal family, each with their own appetite, with tea, sugar, wine, and cooks, and it is best not to even bring the Four Books and Five Classics. Although Confucianism is regarded by many people as conservative, it is still very helpful for the royal family to centralize power.

If Princess Wencheng didn't bring those craftsmen and peasants at the beginning, maybe there would not be so many wars between the Tang Dynasty and Tubo in the future, and there would be no enough food, so it depends on what you use to fight.

Don't talk about recovering Hehuang, maybe even the feudal towns won't be so rampant. In the Anshi Rebellion that year, there was a strength with the help of Tibetan soldiers. It is easy to please God, and it is difficult to send God, but after that, Tubo invaded Chang'an for many years, and it had to be prevented in autumn every year. It involved a lot of energy from Datang, otherwise it would not have made the three towns of Hebei bigger.

Send this information to Li Xiang. The situation is good, the civil strife in Tibet, and the lack of space for the River Emperor to take into account the situation are of great help to recover that area, but it still needs to be paid attention to. Because the new army was not trained so quickly, if this civil war was fought in three days and two days, it would not be good.

What's more, Li Chen was so dark that he thought in his heart, it is best to let them fight for decades, fight for a lifetime, and fight until the country is completely decayed, and then Datang can teach them a lesson.

Hit the plateau and completely subdue Tibet? Not necessarily. Regarding the strategy of Tubo, Li Chen's meaning is very simple, first recover the lost land, then occupy a few key positions, and then build fortresses and even passes over there, completely cutting off the path of Tubo to attack Longxi and Shuzhong. In this way, the Western Regions and Shuzhong will be stable.

In the longer term, we'll talk about it then. The ultimate goal is to vigorously support religion like the Manchurians control Tibet, and completely divide them into several dioceses, and each diocese must be certified by my Datang no matter how your Dharma King is produced, otherwise you will be illegal.

In order to achieve this goal, it is necessary to continue to pay attention to the situation in Tibet. One side cannot be allowed to gain complete power. It is better to give both sides certain support, give them weapons, food and grass, let them have a good time, and beat people's heads into dogs' heads.

'Came out, came out. At this time, a shout interrupted Li Chen's thinking. Li Chen looked up and saw a strange big pot in mid-air, this strange pot slowly turned and tilted, from upright to accompanied, and then slowly poured out red molten iron from the mouth of the pot.

'It's really become, this color, this is steel, how is it possible to make a furnace of molten steel so quickly. An old carpenter, grabbing his gray hair, desperately pulling, as if it was someone else's hair, Li Chen felt pain for him, but he didn't feel it at all, and kept saying that it was impossible.

There is no charcoal, just the air, how can it be that the molten iron has not cooled down at all, but has turned into molten steel. On the side, a timber who seemed to be calmer was also very surprised, he was immersed in the incredulous, and he didn't have time to be surprised.

With the emptying of the molten steel and the injection of new molten iron, the old master materialist redoubled his attention this time. This strange stove was built by Li Chen's orders. The emperor personally instructed the Ministry of Works to work hard to complete it in accordance with the emperor's instructions.

After all kinds of tests, it was confirmed that there was no problem, and today was the first time that this strange furnace was officially used to make steel. Honestly, this furnace is so weird, how can it be made of steel?

There was no fuel, and the light was filled with air in this strange pot, and a lot of air was injected, and everyone thought that the emperor was making a man. How can it be possible to make steel in this way, and when the time comes, it will only abolish the hard work of the Ministry of Industry and the huge cost to build a strange pot. Everyone has the right to accompany the emperor to mess around. But who would have thought that this would really be steeled.

After another quarter of an hour, the strange pot slowly poured again, and it was so red that molten iron flowed out, and the old master could be sure, with his many years of experience, that this was molten steel.

'How, is this okay?' ''Incredible, incredible, is this a spell?'' Why, without fuel, the molten iron does not cool, but becomes molten steel. For everyone, it was incredible, Li Chen just smiled, he can achieve good. Some people may recognize it, this is the Bessemer converter steelmaking method. It's just improved by Li Chen.

Steelmaking is not uncommon in Chinese history. It is said that in the Han Dynasty, there was a method of frying steel. It is to constantly stir the companion, stir and melt the molten iron, to the right extent, pour it into the mold, so that the steel product is completed.

However, there is a disadvantage of this method, which is that it is not easy to determine when it is time to tap steel. If the heat is not well controlled, it is easy to turn into mature iron.

Wrought iron, pig iron, and steel, the difference lies in the carbon content in it, and pig iron is the highest, about 2-4%. Wrought iron is the least, below 0.05%. Steel is somewhere in between. If the heat is not well controlled, the steel will become mature iron.

This technology, by the Tang Dynasty, had been greatly improved. During the Northern and Southern Dynasties, someone invented the steel filling method. To put it simply, since it is easy to become mature iron, let him become mature iron. Then, wrought iron and pig iron are mixed. Mix the two together, then seal and heat. So that after a few days, it can be turned into steel.

With this technology, there is Datang's Mo knife. It's almost the same idea, drizzling pig iron juice with wrought iron and mixing it like this.

However, this method, in Li Chen's opinion, seems to be a bit slow and troublesome. So Li Chen thought of the historical, promoted the steel production of the Bessewheat converter steelmaking method.

With this method, the production of steel is faster. About a quarter of an hour, (half an hour.) In ancient times, an hour had four quarters, an hour was two hours, and a quarter is half an hour in modern times. After a quarter of an hour, a furnace of molten iron turned into molten steel.

This method frightened all the craftsmen who were responsible for producing steel, so why could they be made in this way? There was no fuel, just air. Molten iron turned into molten steel.

Seeing the success of the experiment, Li Chencai didn't care how surprised they were, how they shouted incredulous, he didn't bother to explain to these craftsmen, it would be good if it could be used.

'Sir, why did it turn into molten iron?' The craftsman didn't ask, but someone still asked. Li Chen brought the students from the primary school to visit, and explained to them how to make steel and how to make steel traditionally.

But now that this phenomenon has happened, even those old experienced craftsmen can't explain it, and they are at a loss, so they are naturally more curious.

'You should have learned the three elements of burning, who can tell me. In front of this group of primary school students, Li Chen is either an emperor or an ordinary teacher.

'I know. Soon, a primary school student raised his hand, "The three elements of combustion, fuel, ignition, and combustibles." ''Very good, there are a lot of impurities in the middle of iron, and mixing it properly can give iron a lot of properties. But most of them didn't help. Now we're going to exclave them all. ’

'The air injected is the combustible, and the fuel is the impurities in it, the ignition point, not to mention, the brown smoke you see, the impurities after combustion. ’

'You all know that combustion raises the temperature. That's why instead of injecting fuel, light is injected into air, but instead it is made into steel. Okay, let's move on to the others, so that they don't get in the way. ’

Li Chen smiled at the corner of his mouth, beckoned these elementary school students, and turned to visit other sound properties. Until he left, the smile on the corner of his mouth never faded. Because of the success of the experiment, he was in a good mood.

Steel is the mother of industry, and now he has succeeded in making Datang take a big step. Among them, there is more than just a converter. There are also materials for this converter, which made him spend a lot of effort, and even the entire Datang steel industry, from the source, he spent a lot of effort. Now that he has been a big success, he is not busy in vain, which makes him very excited.

First of all, coking coal has to be used, and Datang now has to produce most of the pig iron, or charcoal, he switched to coking coal. This is a big step forward, as coking coal offers higher temperatures and better quality.

The reason why the quality of iron in the Song Dynasty was not up to par, in addition to iron, was also due to their large-scale switch to coal. As a result, the coal got impurities, and in the process of making iron, it ran into the iron. Coking coal, in the process of refining, has shaved off a lot of impurities, and this alone has improved the quality of Datang Iron.

And then there's the converter. He carefully selected alkaline materials for the converter, so that he could ignore whether there were a large number of impurities in the pig iron. In the future, when making steel, you can ignore the origin of iron, and you don't need to select high-quality iron in particular.

You must know that for this alone, it took more than ten years for later generations of researchers to understand why some of the same methods are made of good steel, while others are very fragile. Li Chen made a choice, so that Datang Iron and Steel production would take a lot of detours.

Thinking that Datang has a brighter future, Li Chen is even happier. (To be continued.) )