In fact, 10 million copper coins is indeed a huge amount of money for the Tang Dynasty in the early days of Zhenguan. If Li Shimin wants to mint so much money in a short period of time, even if it is an old version of copper coins, it is still a difficult task to complete.

According to historical records, the highest copper coins minted in the early days of Zhenguan in the Tang Dynasty were only 320,000 yuan a year. In the period of Song Zhenzong, the highest annual minting of more than 5 million copper coins, this is not enough, so the earliest paper money, Jiaozi.

Of course, the reason why there is such a small amount of minting, on the one hand, is because the currency circulation in the early Zhenguan period was not high, in addition to copper coins, the silk silk of this period also belongs to the currency in circulation, and on the other hand, it is also because of the limitations of the casting process.

Of course, for Li Anran, it is not difficult to mint copper coins. Just the few copper mines found in the land of Datang that are hidden in inaccessible areas and have very considerable reserves are enough to support the production of huge copper coins.

In addition, each copper mine is equipped with fully automatic manufacturing equipment, from smelting, purification, plate making, stamping, to the final product inspection, all of which are directly handled inside the equipment, and a large number of copper coins and copper coins will be manufactured almost every second.

At the same time, in the processing area of the People's Bank of the Celestial Empire, there is also such equipment. The copper coins that are collected into the treasury through deposits, investment and financial management, insurance and other businesses will be purified and refined in the corresponding production equipment in the processing area.

The so-called "impurities" are then added in proportion, of course. Considering that the value of tin is higher than that of copper, it is naturally impossible to put the cart before the horse as the ancients did, and all low-value metals are used, and at the end they are made into new copper coins and copper coins.

As for the loss generated in the process of currency reconstruction, it is really not even a drop in the bucket for Li Anran. Not to mention, there are also the fees for the management of deposits, the profits generated by lending and issuing public bonds, which are nothing at all.

The reason why in addition to the copper coins that began to be promoted and circulated also made of old copper coins is mainly due to the fact that each new copper coin is a Wuwen, that is, worth five ordinary copper coins, in order to observe the price of the early stage. It's not that it can't be used, but it's still inconvenient.

Just like the Hereafter. With the rise in prices every year, not to mention a dime, even a dime can no longer buy anything, but a dime still has an indispensable value. Not to mention the Celestial Empire. Even abroad is indispensable.

Of course. The "super" currency, represented by Zimbabwean coins with a minimum denomination of millions, is of course a different story.

In fact, when making new currency, Li Anran also thought about using aluminum as a material for currency. It's light metal, though. But it has good ductility and a tough texture.

Even in humid air, an oxide film can be formed to prevent metal corrosion, and the key is that this oxide film does not affect the beauty of the coin like patina and rust.

In the period when cents were not eliminated, the three cents of one, two, and five cents were made of aluminum. In addition to the light specific gravity, the biggest disadvantage is that this thing is not resistant to burning. Even if it's just a fire on the fire, it will turn black.

In addition to aluminum coins, Li Anran originally planned to make stainless steel coins. It's just that although the cost of this thing is relatively low, it is much more troublesome to manufacture than copper coins, after all, the composition of stainless steel is relatively much more complex, and it is far less convenient than copper coins.

In addition, if you want the people of Datang time and space to accept these two completely new currencies, to some extent, it is more difficult than accepting money tickets. After all, money tickets are directly linked to gold, silver and copper coins, and aluminum and stainless steel coins are completely different things.

After Li Anran delivered the first copper coin worth 10 million yuan to Li Shimin, he was not idle. Instead, he made a special trip to the modern time and space that he hadn't returned to for a while, and issued a purchase list to Hu Ling'er, who stayed there.

Previously, after Li Shimin finalized the public debt of 500 million yuan, he was very smart not to ask for all the money. After all, on the surface, it seems that such a thing as a war costs money, but in fact, in addition to the military sound, the rest must be replaced with corresponding materials.

Don't look at Li Anran, who has been operating in Datang Time and Space for about two years, especially after getting the multi-functional exploration ship, he has indeed put a lot of effort into some basic industrial chains, such as various mineral deposits hidden in hard-to-reach places.

In addition, while building a shrine on the island of Taiwan, which is also known as the future generation, it also did not forget to open up a large number of farmland, fruit forests, fishing ponds, pastures, and establish various industries closely related to life, such as textiles, metallurgy, and brick kilns.

Even in the Australian continent, the African continent, the European continent, and the American continent in later generations, we found those various mineral veins with amazing reserves that are quite famous in modern time and space, and did some deep processing work when they were exploited on a large scale.

But even so, it is still too much to bear the material consumption of Datang's troops against the Turks this time. Whoever let Li Anran start to build a resource base on a large scale was not long, and he was limited by all aspects, and his ability was still limited.

Fortunately, the earth in modern time and space has a very complete industrial base. Although the level of science and technology is a little worse, it is only enough to provide various materials for a battle for Datang, which is still in the era of cold weapons.

Among all the materials, the most important thing is not weapons such as swords, guns, halberds, armor, leather boots, helmets and other armor, but the food and grass that are indispensable for people to eat and chew every day.

Grain and grass, as the name suggests, is grain and forage.

The former is eaten by people, and the latter is naturally used for horses and cattle and donkeys for pick-up carts.

Don't look at the value of a good knife, it is enough to withstand more food, not to mention forage. But you can't stand it, a good knife can be used for a long time, but if you eat a little bit of food and grass, you will eat a little less, and the more battles you fight, the more soldiers and horses, the greater the consumption.

Let's not talk about more, let's take the number of 100,000 troops often written in those romance novels as an example, although there is no ration for an adult soldier's stomach per meal, but in order to maintain physical fitness and combat effectiveness, it is not possible to eat less.

In ancient times, even if you fight in the field, you can rely on military rations to have meat, and even functional drinks, coffee, fruits and other auxiliary diets, don't even think about it, it's good to be able to eat enough on weekdays.

That is, before the start of the fight, some meat such as dried meat and dried meat will be sent on it to supplement enough nutrition for the soldiers. But even so, not to mention that there are more in the sky this day, let's calculate it according to one pound of grain, and an army of 100,000 is as much as 100,000 catties.

Even if the ancient unit of measurement is somewhat different from the metric unit of later generations, after all, this account is only an approximate calculation, and there is no need to be too serious. 100,000 catties is considered 50,000 kilograms, that is, as many as 50 tons, and this is only a day's amount.

And after a big battle, not to mention lasting a year and a half, counting the process of marching, camping, retreating, etc., a few months is always needed. Fifty tons a day, 1,500 tons in thirty days, that's really not a small number.

The price of wheat flour in modern time and space is almost three yuan a kilogram, one ton is 3,000 yuan, and 1,500 tons will cost about 4.5 million yuan. Even if the quantity is ordered more and the price can be cheaper, it will not be too bad.

What made Li Anran speechless the most was that the multigrain flour that was only used to feed livestock in the past was actually more expensive than wheat flour after the hype of the so-called concept of diet and health, and the only cheapest thing left was corn flour used as feed.

Fortunately, although this thing is made as feed, it is not inedible for people, and it is said to be quite nutritious. The only bad thing is that this thing is processed from genetically modified corn, although it can't be eaten, but Li Anran will never try it.

Considering the food during the war in ancient times, there is no way to pay attention to nutrition and taste like modern times, plus for transportation and storage reasons, in addition to wheat flour and corn flour, Li Anran only prepared a small batch of rice. (To be continued......)