Demon King City needs to be hidden, and large-scale mining of sensitive resources such as minerals is bound to attract the attention of the natives of the brave world.

The micro-veins are perfect for the situation.

Elven Gates basically don't need mines.

They have a natural aversion to fire, so they don't smelt iron. They can use natural materials and magical enhancements to craft trees that are as hard as steel, and buildings and weapons are made of this magically strengthened wood.

For this material, Roy also took a look.

Without enough foundation of life magic, and enough maintenance by life mages, it is impossible to make this kind of wood.

The elves are simply wealthy and use extremely low efficiency to craft usable materials.

It is still safe to smelt iron, and the development of alloys is the best policy.

After obtaining the right to use the receiving point, Roy sent people to explore, and at the same time urged the progress of the research institute.

There is a huge demand for fast food on the elf side, and Roy directly set up a new factory outside Rondo City, mass production of fast food on the assembly line, and then transported it to the elf kingdom for sale. There are many farms and estates around the city of Rondo, and the ingredients are perfectly sufficient for large orders.

The fast-food restaurant business is rolling.

Mavis will pay every bill, and the elves will gain weight just around the corner.

The fast-food business stabilized.

Roy focused on the research institute, and with his supervision and help, the original two-week development time was reduced to one week. The first multi-functional mixing machine was successfully produced.

At this point in time, the ore reserves of Demon King City were completely exhausted.

The ore mined by the goblins was depleted.

Because the factory occupies a large number of people, Roy is not easy to hire new personnel, so through the Miga Card Chamber of Commerce, he used gold coins to buy a batch of ore for emergency, and made three machine tools, and then the production of mining equipment.

The Pioneer's database contains a variety of mining tools.

The research institute changed the blueprints from scientific to magical, and then through machine tools, and finally enchanted them.

Roy supervised the entire process.

Another 1 week of hard work.

The first solo mining equipment and a rail minecart were made.

A mine diamond with a diameter of half a meter can be held by a single person, and goblins can be used.

The drill is made of iron-carbon alloy, carefully crafted by dwarven craftsmen, and magically enhanced to increase overall strength. On the top of the drill bit, there is an earth-based ablation enchantment, which is used to soften the ore and increase the mining speed.

The small magic machine provides torque, and the structure is simple and rough.

At the end there is a mana crystal that can be used over and over again, providing a source of mana.

Roy picked it up and tried it, at least 30 kilograms, and the individual equipment was quite laborious.

Have a goblin operate the drill bit and smash a piece of iron ore. With the power of the Gothic dynasty, these goblins can wield machines. The high speed of the drill bit, coupled with the ablation enchantment of the soil system, the iron ore is like a wooden plank, easily crushed and broken.

Roy was very satisfied with this effect.

A single mining rig is faster than a hundred goblins smashing with a manuscript. And the cost of maintenance is only the repair of the drill bit and the supply of magic power.

The mana supply is negligible, and the mana pool of Demon King City lv1 is not a problem to supply 500 per day, and the consumption is very small. Moreover, any creature with magical powers can replenish its mana.

The cost of drill bit repair is very low, and it is good to repair the enchantment and replenish the wear, which is much lower than the common cost of 100 goblins.

100 production tasks were issued.

The goblin who got the Mine Drill went to the mine. This goblin single-handedly destroyed the previous production of 100 goblins.

With the continuous equipment of the mine drill, the mining speed has increased like a leap, like an ant, quickly encroaching on the low ore veins.

As the mining speed increases, the minecart tracks are also paved, powered by mana, pulling heavy ore up from the low for maximum efficiency.

Roy quickly replenishes population units and increases mining speed.

Factories, green beast mercenary groups, and mines all need manpower.

Rapid development.

Rapidly expanding.

Roy soon faced a conundrum.

That's the demographic problem.

There is an upper limit to the population units that each demon king can sign, and Roy's current strength, 3500+ units of population, will soon be capped.

In addition, the Demon King City has also been rapidly expanded, with warehouses, factories, and research institutes, and the land of 1000*1000 meters is almost insufficient, and the entire Demon King City is a little congested.

This gave Roy a bit of a headache.

The population limit is linked to his strength, and it is linked to his Demon King City level.

The area of the Demon King City is linked to the level of the Demon King City, and it can also be expanded by itself through the precious ore of the Space Stone.

Luo Yi originally expected to upgrade the Demon King City within 1 year and enter the ranks of the junior demon kings.

I didn't expect it to develop too fast now, and it only took two months to hit the ceiling.

To upgrade the primary Demon King City, you need:

The Demon King's combat power is 300 or more.

The total assets are valued at 100,000 Element Coins.

Population 1k or more.

30 miniature hearts of the brave.

Level 1 and above, 1 Elemental Core of each of the 6 Elemental Cores.

The only thing that made it difficult for Roy was the 30 miniature Hearts of the Brave. Except for ambushing Angel and his party when he first came, he hadn't seen any other brave warriors.

It is not easy to get together 30, and it is even necessary to expose the location of the Demon King City.

After some consideration, Roy decided to slow down.

Under normal circumstances, it takes more than 2 years for a trainee demon king to upgrade to a junior demon king. And in 3 months, he completed the accumulation of violence. Except for the heart of the brave, other conditions have been met.

This can be said to be a miracle on other demon kings.

Now slow down the pace of development and focus more people and energy on scientific research.

Science and technology are the primary productive forces.

That's the truth!

The Tech Magic Tree rises and any problem can be solved. Industrial development, labor problems are not a matter under the high-tech tree.

Adjust the employment plan.

Reduce the supply of personnel to factories and green beast mercenary groups, so that they can hire local labor, or buy slaves.

The Blue Beast Mercenary Group issued a recruitment announcement, and peripheral personnel can hire humans, and the core combat power only accepts orcs.

The extra population units in Demon King City are mainly used for the employment of scientific researchers. Goblins, dwarves, dark elves, succubi, evil eyes, and a mess of mixed-race low-level demons, the research institute has also undergone a wave of expansion, and supporting libraries and laboratories have been established.

Two more weeks passed, and at the end of the month.

This month, Roy has had a very leisurely life, and there is basically nothing to worry about.

After the Migaka Chamber of Commerce became familiar with the routine, it began to concoct hype development in other cities. Through waterways, rapid expansion to other large cities. Leverage spirits, desserts, perfumes, fast food to make a quick profit.

The Blue Beast Mercenary Group expanded.

Curry favor with local lords, pay large taxes, suppress local landlords, and ignore the threats of the lesser nobles.

Business expansion is becoming more and more stable, and the capital is rolling in more and more.

In addition to bringing money, the Chamber of Commerce also brings very important information.

Information about the other demon kings in this brave world, the general flow of the brave people in the world, and so on.