"Copper mines? Why not just exchange pure copper, is the price of pure copper high? ”

"Hmm...... Pure copper is a metal material, and the price is 50 times higher! Take the copper ore directly back and smelt it, you can get the most metal and have high variability.

Moreover, most of our current copper is mainly used to forge walls, build hidden defenses, or expand the Holy City.

The walls only need to reach 50% copper content to isolate 'life outside the city', and there is no need to use pure copper...... On the contrary, on the basis of 50%, the integration of other metals or special stones can greatly increase the hardness and toughness of the city wall. ”

"Smelting Technology...... Sounds very developed. ”

"There is a dedicated alchemy team in the Holy City, and it is not difficult to smelt metals."

"Alchemy ......" Han Dong has heard this term for the second time, if he returns to school this time, Mr. Black and White has no special arrangements during this semester, and Han Dong plans to engage in a side business during his free time.

After all, Han Dong is different from an ordinary trainee knight.

In addition to the needs of food, clothing, housing and transportation, additional economy is needed to support this 'special head'.

Of course, Han Dong himself is also very interested in the special science of this world.

In addition to killing monsters in the next dungeon, it's good to engage in hobbies and relax.

…………

"Is this the difference in difficulty that brings different benefits?

Swap out the brass, and I'll have thirty points to redeem...... Let's see what's out there first. ”

In addition, Han Dong had another doubt.

That is, if you take all the points and exchange them for brass, and then use them directly as currency in the Holy City, is it feasible? That's a lot of money.

Cass immediately vetoed.

"Brass is not the same as copper coins.

The value of the copper coin is much higher than its own copper content, and as a kind of circulating currency, the Holy City Treasury under the name of the Council is responsible for the production and issuance.

Because copper metal is of great significance to the Holy City.

The use of copper coins as a high-end circulation currency is also a way to indirectly remind the public of the 'importance of brass'...... In the manufacture of copper coins, not much brass was actually spent.

The copper content of a copper coin is controlled at about 30%, and the total mass of the copper coin is not high.

The monetary value of copper coins is achieved mainly through a special manufacturing process and with an unforgeable seal printed on the front and back of the coin. ”

"I see!" Han Dong nodded.

Cass continued, "Besides, even if we take the brass back and get a lot of money...... However, the items provided by the Trading Center are limited.

In Destiny Space, points can be exchanged for anything.

Right...... Anything, as long as you have enough points, can be exchanged.

Moreover, only those who survive the fateful event can come here once!

With only half an hour to redeem at a time, the opportunity is invaluable...... Like we have all prepared in advance, if we can clear the level alive this time, we will be able to exchange the most suitable things for ourselves. ”

Han Dong followed Cass's instructions and reached out to touch the surface of the shell that resembled a Dyson ball.

A stereoscopic projection screens are projected in mid-air, divided into six categories.

【Equipment】

【Books】

【Living Creatures】

【Consumables】

【Material】

[Others]

When Han Dong saw such a high-tech projection interface, he further affirmed that this Dyson sphere-like thing was definitely not a product of the current world.

also made Han Dong begin to guess the origin of the destiny space.

"A future advanced civilization has seen the horror and potential danger of 'life outside the city', and the means to leave it on Earth in advance? Let's go back and ask Mr. Black and White...... There's no point in me guessing here. ”

Find the brass through the finder and spend 10 points in exchange for a ton of brass for the difference.

Next, since there were only thirty minutes left in the time limit, Han Dong began to quickly check the relevant categories.

Indeed, as Cass said, almost everything can be exchanged here, and the [Equipment] column is clicked on, and it needs to be filtered by quality and category.

The corresponding equipment will be arranged from low to high by the point price, which dazzles Han Dong.

The price of a piece of green high-quality equipment is about 20~60 points.

And the blue sophisticated equipment has a price of at least three digits.

Expensive...... It's definitely expensive.

In this way, Han Dong, as a trainee knight, has to pass through the fate space three times normally to have enough points to exchange for blue equipment...... Of course, there are also some special rewards for Destiny events that may be rewarded with points.

But there's a good thing here.

The various side plots of the Destiny Event, and the equipment rewards given, are basically random.

And here, as long as you have enough points, you can exchange them for the equipment that suits you best......

Han Dong then clicked on the category of [Books], which belonged to the category that Han Dong did not know.

Inside, there are various magic books, secret books, and even demon books, from which you can also obtain demonic powers.

Follow.

Han Dong also flipped through very interesting things, the cultural martial arts that belonged to his motherland, and even the secret books of cultivation that only appeared in some of them.

The price of basic martial arts is not very high, you can buy it for about 20 points.

As far as the cultivation cheats are concerned, the cheapest one also starts at five hundred points, and the quality is also above blue...... Han Dong won't consider it for the time being.

Although Han Dong is not very good at his body, he does not plan to buy a book on body refining to exercise his body...... The body only needs to be replaced gradually to improve, and there is no need to practice on your own.

Moreover, Han Dong currently has an 'obscure' book on his body, and he has no time to learn other knowledge for the time being.

The [Living Creatures] column is what Han Dong values more.

Inside, you can also find a variety of strange beast life.

Except for humans.

Even some magical and fantastic creatures are basically there...... There are all kinds of magical beasts, from small lava dogs and wind wolves, which are similar in size to ordinary dogs, to dragons, Beamon behemoths, and giant sea monsters.

Of course, there are quite a few humanoid races...... Such as elves, trolls, halflings, trap creatures, and so on.

This humanoid life is not only expensive but also limited to purchase.

Some of the 'Mastery' Cadet Knights should be able to exchange them for living creatures here.

Han Dong stared at the high-priced creatures one by one, not interested at all...... If he wants, he can just go to the 'Destiny Space' and grab the ready-made.

Chen Li and Tuogu are by no means inferior to these living creatures in terms of potential.

As for the follow-up consumables and materials, there are also many things that interest Han Dong, such as potions for the flesh and bones of the living and dead, or potions that can instantly replenish energy, which are enough to solve many dilemmas, but the price is not what Han Dong can afford at present.

Han Dong is not clear for the time being, and 30 points can't be exchanged for something too good, so he is ready to keep it for the next time.

That's it.

Han Dong, who exchanged for a ton of copper ore, returned to the [Bell Tower].