"Copper ore? Why not just exchange it for pure copper? Is the price of pure copper very high? "
"Hmm … pure copper is a metal material, so its price is 50 times higher! Bringing the copper ore back for smelting will yield the most metal with high variability.
Moreover, most of our copper is used to cast city walls, build secret defensive measures, or expand the Holy City.
The city walls only need to have a copper content of 50% to isolate 'life outside the city', so there's no need to use pure copper … Instead, on the basis of 50%, we can integrate other metals or special stones to greatly increase the hardness and toughness of the city walls. "
"Smelting technology … sounds very advanced."
"There's a professional alchemy team in the Holy City, so smelting metal is not difficult."
"Alchemy …" This was the second time Han Dong had heard this term. If Mr. Black And White did not have any special arrangements for him this semester when he returned to school this time, Han Dong planned to use his free time to start a side business.
After all, Han Dong was different from ordinary trainee knights.
In addition to food, clothing, housing, and transportation needs, he also needed extra money to support this "special brain."
Of course, Han Dong himself was also very interested in the special science of this world.
It was good to do hobbies and relax in addition to doing dungeons and killing monsters.
…
"Is this the different rewards brought by different difficulty levels?
After exchanging for brass, I still have 30 points to exchange … Let's see what there is first. "
In addition, Han Dong had another question.
That was, if he used all his points to exchange for brass and then used it as currency in the Holy City, would it be possible? This was a huge sum of money.
Cass immediately rejected it.
"Brass and copper coins are different.
The value of copper coins is much higher than the copper content of the coins themselves. As a circulating currency, the Holy City Treasury under the Parliament is responsible for manufacturing and issuing them.
Copper is very important to the Holy City.
Using copper coins as a high-grade circulating currency is also an indirect way to remind the people of the importance of brass … In fact, not much brass is spent on the production of copper coins.
The copper content of a copper coin is controlled to be around 30%, and the total quality of the copper coin is not high.
It is mainly through a special manufacturing process and an unforgettable seal on the front and back of the copper coin to realize its value. "
"I see!" Han Dong nodded.
Cass continued, "Besides, even if we bring the brass back and exchange it for a lot of money, the items provided by the trade center are limited.
In the destiny space, points could be exchanged for anything.
That's right … As long as you have enough points, you can exchange for anything.
Furthermore, only those who survived the Fate event would be able to enter this place once!
Every time, we only have half an hour to exchange. This opportunity is incomparably precious … We have already made preparations in advance. If we can survive this round, we will be able to exchange for the most suitable item for ourselves. "
Han Dong followed Cass's instructions and reached out to touch the surface of the shell that resembled a Dyson sphere.
A three-dimensional screening screen was projected in mid-air, which was divided into six categories.
[Equipment]
[Books]
[Living Creature]
[Consumable]
[Materials]
[Others]
When Han Dong saw the high-tech projection interface, he was even more certain that this Dyson sphere was not a product of the current world.
This also made Han Dong start to guess the origin of the Destiny Space.
"Some advanced civilization in the future saw the terror and potential of the 'life outside the city' and left a method on Earth in advance? Let's go back and ask Mr Black And White … There's no point in me blindly guessing here. "
First, he used the searcher to find the brass and spent 10 points to exchange for a ton of brass to complete his task.
Next, as there were only 30 minutes left, Han Dong began to quickly look up the relevant categories.
Indeed, as Cass said, almost everything could be exchanged here. Clicking on the [Equipment] column, one had to filter through the quality and category (weapons, helmets, hands, etc.).
The corresponding equipment would be ranked from low to high by points, which made Han Dong dazzled.
A green quality equipment's price was about 20 to 60 points.
And a blue quality equipment's price was at least three digits.
Expensive … It was definitely very expensive.
With this calculation, as a Trainee Knight, Han Dong had to go through the destiny space three times to have enough points to exchange for a blue equipment … Of course, there were also some special Fate events that might reward points.
But there was one advantage here.
The rewards from the various Fate events and side quests were basically random.
But here, as long as you had enough points, you could exchange for the most suitable equipment for yourself …
Han Dong then clicked on the [Books] category, which was a category that Han Dong was not familiar with.
Inside, there were various magic books, secret books, and even the Book of Demons, from which one could obtain the power of demons.
Immediately after.
Han Dong also found very interesting things, the cultural martial arts of his own country, and even the cultivation secret books that only appeared in some novels.
The price of the basic martial arts was not very high, about 20 points could be bought.
As for the cultivation secret books, the cheapest one was at least 500 points, and the quality was above blue … Han Dong did not consider it for the time being.
Although Han Dong's body was not very good, he did not intend to buy a body training book to train his body … The body only needed to be gradually replaced to improve, there was no need to train himself.
Moreover, Han Dong currently had an 'obscure' book on him, so he had no time to learn other knowledge for the time being.
The [Living Creatures] column was more important to Han Dong.
Inside, one could also inquire about all kinds of strange creatures.
Except for humans.
Even some magical and fantasy creatures were basically there … There were all kinds of magical beasts, from the small ones that were similar to ordinary dogs, such as lava hounds and wind wolves, to the large ones such as dragons, behemoths, and giant sea monsters.
Of course, there were also many humanoid races … such as elves, trolls, half-orcs, mechanical creatures, and so on.
This kind of humanoid life was not only expensive, but also limited in purchase (one needed to reach the seed germination stage and reach the knight stage to buy this kind of humanoid life).
Some 'Control' Apprentice Knights should be here to exchange for living creatures.
Han Dong stared at the expensive living creatures one by one, not at all interested … If he wanted, he could directly go to the 'Destiny Realm' to catch ready-made ones.
Chen Li and Togu's potential was not inferior to these living creatures.
As for the subsequent consumables and materials, there were also many things that interested Han Dong, such as medicine that could bring back flesh and bones from the dead, or a potion that could instantly replenish energy, which was enough to solve many difficulties, but the price was not something that Han Dong could afford at the moment.
Han Dong was not clear for the time being, and 30 points could not be exchanged for good things, so he prepared to use it next time.
Just like that.
Han Dong, who had exchanged for a ton of copper ore, returned to the [Clock Tower].
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