In addition to the issue of the ownership of iron ore in this era, Li Zexuan took it for granted, and he did not think clearly about the refining of pyrite when he was in the workshop at that time.

The composition of pyrite is mainly ferrous sulfide, and he thought that through a series of chemical processes, sulfur and iron could be extracted from it, but after he returned home, he calculated it carefully and found that it was easier to extract sulfur from pyrite, but it was too difficult to refine iron!

It's not that it can't be refined, but with the current conditions, it is difficult to get it, and even if it can be made, the cost is too great and not cost-effective at all!

So if he wants to get a lot of iron, he has to ask for some magnetite (the main ingredient ferric tetroxide).

However, in addition to refining sulfur, pyrite can also obtain an extremely important industrial raw material, which will be discussed later.

"What do you want iron ore for?"

For sulfur ore, Li Er didn't care very much, and the imperial court did not have much control over sulfur ore, but iron ore was different, in the early Tang Dynasty, although the imperial court canceled the special tax on salt and iron, but basically all the iron ore that has been proven belongs to the imperial court, and in principle, private individuals are not allowed to own iron ore.

"Your Majesty, the boy's workshop is short of iron! The Iron Boy that can be bought near Chang'an City has all been bought, but it's still not enough! ”

Title and word use is a very deep knowledge, Li Zexuan calls himself a kid here instead of a minister or a minister, in order to show that he is now talking to Li Er as a junior, not a courtier, because the topic he is talking about now is a businessman after all, and it is very inappropriate to use the identity of a courtier.

"Humph! Unpromising! You kid really think you're a treasure in that workshop? Iron ore, I will not give it to you, not only you lack iron, but the court is now even more short of iron! Do you think your workshop is important, or is it my Shaofu Supervisor and Beidu Ordnance Supervisor that are important? ”

(The Tang Dynasty implemented a system of three provinces and six ministries, and the army weapons workshop was under the management of the Ministry of Industry and the Ministry of War, which were called Shaofu Jian and Beidu Military Weapons Supervisor respectively)

After Li Er heard this, he shook his sleeves and didn't have a good air.

In the early Tang Dynasty, the Tang Dynasty adopted the government military system, with 574-800 Zhichong prefectures distributed throughout the country, and 627 of them were famous. This number is varied, which means that the minimum number of records is 574 and the maximum number of records is 800. The prefecture was divided into three classes, with a strength of 1,200, 1,000, and 800 respectively. Therefore, in the early Tang Dynasty, there were about 800,000 government soldiers in the country, of which about 260,000 were in Guanneidao, which was the main force of government soldiers - the 16 guards of the Tang Dynasty.

The weapons and equipment of these 260,000 people were manufactured by the Shaofu Supervisor and the Northern Capital Ordnance, and the local state governments were responsible for the military equipment of the rest of the local state capitals, but the iron they used was not allocated by the "central government"!

Such a huge amount of iron consumption made the imperial court's demand for iron ore also very strong.

"Well, Your Majesty, you are mistaken! The kid didn't want the existing iron ore in Datang, the kid meant that the kid looked for the iron ore by himself, and after finding it, could the iron ore be handed over to the kid to send someone to mine? ”

Li Zexuan explained cautiously.

Li Er raised his eyebrows in surprise and said with some surprise: "Oh? You kid can also feng shui and invert gold mining? ”

In ancient times, the inverted bucket was called one of the eight gates outside the rivers and lakes, which was regarded as the application of feng shui in the exploration of gold mines and other mineral deposits. The art of prospecting is known as the Ninth Gate: the Gold Mining Gate. Because of the long-term service of the Kinmen people, there are very few successors, but whenever they find a good gold mine, they are making gold every day.

Li Zexuan is also a member of the Taoist Sect, of course he has heard of inverted gold mining, but how can he do this? He doesn't seem to have these feng shui knowledge in the memory of this life, and his confidence in prospecting lies in the memory of his previous life! But I definitely can't say that to Li Er.

"Well, under the influence of the family teacher, the kid knows a little about these, a little bit about them!"

Li Zexuan's mind changed sharply, and then he said nonsense seriously.

Li Er glanced at him twice, and only said after a while: "In this case, I will allow you an iron mine!" But at the same time, you have to help the court find a similar iron ore in addition, and then your iron ore will not have to pay taxes to the court, and you can mine it at will, how about it? ”

Although the iron ore at this time is owned by the state, but a large part of it is mined by the people, the "Old Tang Dynasty Book and Official Records" records: "Where the world comes out of the copper and iron state capital, listen to the private mining, the official collects its taxes", Li Er, as the emperor, still has a lot of "room for operation" on this, and when the time comes, it can be ensured that other officials can not pick out the thorns.

Old fox, Lao Li's advantage is really not something that ordinary people can take advantage of, Li Zexuan slandered in his heart, and after thinking about it for a while, he nodded and arched his hand: "Thank you, Your Majesty!" The sulphur ore ......"

Li Er smiled proudly, and then said, "Sulfur ore, you are free!" As long as you can find it, it's yours, I won't ask! ”

Although he didn't know what Li Zexuan wanted the sulfur mine to do, he didn't bother to ask, this thing was not an important national strategic material, so it should be regarded as the benefit of Li Zexuan joining the city.

"Your Majesty, the ministers should go all out to help the King of Hejian County manage the city and increase revenue for the Datang Treasury!"

Such a result, although it is not particularly ideal, but Li Zexuan can also accept it, it can be regarded as a contribution to the country, the more iron the court has, the better the army's weapons, and the country will be stronger!

As for the right promotion of the city's ship, anyway, he doesn't need to go to Guangzhou to "sit on duty", he just needs to use his brain, which has little impact on his current life.

"Humph! Get out of here! ”

Seeing Li Zexuan's appearance of "seeing a rabbit and immediately scattering an eagle", Li Er snorted angrily.

Grass, Lao Li is so disrespectful, unload the mill and kill the donkey! Li Zexuan was a little unhappy in his heart, but he did take advantage of this matter, so he didn't get angry with Lao Li, arched his hand, and withdrew.

Hmph, this broken palace master still doesn't want to stay!

Out of Taiji Palace, Li Zexuan secretly gave Li Er a middle finger, and then walked towards the palace gate, ready to go home.

"Brother Xiaoxuan!"

At this moment, a pleasant female voice came from his side, and when Li Zexuan heard the voice, he saw Changle walking with lotus steps, coming in style, very dignified and elegant.

"Your Highness the Princess!"

The reason why Changle looks so dignified is because he is now in the palace and has to obey the rules, and similarly, Li Zexuan also has to obey the rules, so he honestly bowed his hand and saluted.

"Brother Xiaoxuan, hurry up and be polite, Changle is here to thank Brother Xiaoxuan! Thank you for speaking for Changle in the court!

Changle stepped back from the left and right, hurriedly came over, and whispered, the little girl's eyes were like water, making her whole person look very gentle

....................

I heard that a typhoon is coming, and friends in Jiangsu, Zhejiang and Shanghai should also pay attention to safety when enjoying the coolness brought by the rainy day!

(End of chapter)