"Copper ore? Why don't you directly exchange pure copper? Is pure copper very expensive?"

"Well... pure copper is a metal material, and the price is 50 times higher! Take the copper mine directly and smelted to obtain the most metal and have high variability.

Moreover, most of our copper is mainly used to cast city walls, build hidden defense measures or expand the holy city.

The city wall only needs to reach 50% copper content to isolate the ‘life outside the city’. There is no need to use pure copper… Instead, the integration of other metals or special stones on the basis of 50% 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 smelter metals."

"Alchemy..." This is the second time Han Dong has heard this term. If he returns to school this time, Mr. Hei and White will not make any special arrangements during this semester. He will use his spare time to plan to do a side job.

After all, Han Dong is different from ordinary trainee knights.

In addition to the demand for food, clothing, housing and transportation, there is also an additional economy to support this "special head".

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

While killing monsters in the dungeon, it’s great to relax with your interests and hobbies.

…………

“Is this the benefits different from different difficulties?

If I change the brass, I still have thirty points to exchange... Let's see what's there first."

In addition, Han Dong has another doubt.

That is, is it feasible to use all the points to exchange for brass and then use them in the Holy City as currency? This is a lot of money.

Cass immediately rejected it.

“Brass and copper coins are different.

The value of copper coins is much higher than their own copper content. As a type of currency in circulation, the [Holy City Vault] under the name of the parliament is responsible for the manufacture and issuance.

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

Using copper coins as a high-level circulating currency is also a way to indirectly remind the public of "the importance of brass"... In fact, there is no cost to make copper coins.

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

Its currency value is realized mainly through special manufacturing processes and an unforgeable seal is printed on the front and back of the copper coins."

"So that's it!" Han Dong nodded.

Cass continued: "And even if we bring brass back and exchange it for a lot of money... but the roads provided by the [Trading Center] are limited.

In the space of destiny, points can be exchanged for anything.

Yes...you can get anything as long as you have enough points.

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

Each time, there is only half an hour of redemption time, and the opportunity is extremely precious... For example, we are all ready in advance. If we pass the level alive this time, we can redeem what is most suitable for us."

According to Cass's teaching, Han Dong reached out and touched the surface of the shell similar to a Dyson ball.

A three-dimensional projection screening interface is projected in mid-air, which is divided into six categories.

【equipment】

【books】

【Living creature】

【Consumables】

【Material】

【other】

When Han Dong saw such a high-tech projection interface, he further confirmed that this Dyson-like thing was by no means a product of the current world.

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

"A future higher civilization sees the horror and potential danger of 'life outside the city' and the means left on the earth in advance? Go back and ask Mr. Black and White... It's meaningless to guess here."

First find brass through the searcher and spend 10 points in exchange for a ton of brass for submission.

Next, since the time limit was only 30 minutes left, Han Dong began to quickly review related major categories.

Indeed, as Cas said, it can almost be exchanged for everything here. Click the [Equipment] column and need to be filtered through quality and category.

The corresponding equipment will be arranged from low to high through the points price, which makes Han Dong dazzled.

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

The price of blue fine equipment is at least three digits.

Expensive...it must be very expensive.

After doing this, Han Dong, as an apprentice, had to pass three destiny space normally to have enough points to exchange for blue equipment... Of course, there are also some special rewards for fate events that may have points rewards.

But one advantage here is.

The various side plots of the fate event, and the equipment rewards given are basically random.

And here, as long as you earn enough points, you can redeem the equipment that is most suitable for you...

Han Dong then clicked on the category [Book], which belongs to the category that Han Dong didn't know.

It contains various magic books, secret books, and even books of demons, and you can also obtain the power of demons from them.

Follow immediately.

Han Dong also found very interesting things, cultural and martial arts belonging to his motherland, and even secrets of cultivation that only appeared in some novels.

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

As for the secrets of cultivation, the cheapest one starts with 500 points, and the quality is also above blue... Han Dong won't consider it for the time being.

Although Han Dong's health is not very good, he does not plan to buy a body refining book to exercise his body... His body only needs to be gradually changed to improve, and there is no need to practice it yourself.

Moreover, Han Dong currently has an "obscure" book on his body and has no time to learn other knowledge.

[Living Things] column is something Han Dong values ​​more.

There are also various strange beast life that can be found inside.

Except for humans.

Even some magical and fantasy creatures are basically... all kinds of monsters, from lava dogs similar to ordinary dogs, wind wolfs, to dragon clans, behemoths, and giant sea monsters, everything is available.

Of course, there are also many humanoid races...such as elves, trolls, half-body orcs, mechanical creatures, etc.

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

Some 'control' trainee knights should exchange living things here.

Han Dong stared at the expensive living creatures, not interested at all... If he wanted, just go directly to the "Destiny Space" to catch the ready-made ones.

Chen Li and Togu are absolutely no worse than these living creatures in terms of potential.

As for subsequent consumables and materials, there are also many things that interest Han Dong, such as potions for life and death, flesh and bones of human flesh, or potions that can instantly replenish energy, which are enough to solve many difficulties, but the price is not something Han Dong can afford at present.

Han Dong has not made it clear yet, and he can't exchange 30 points for anything that is good, so he is going to keep it for the next time.

that's all.
Chapter completed!