One bottle of potion can restore half of an Eighth-Rank Adventurer's Mental Energy; one can drink up to three bottles in a short period, and it is equally effective on animals.

In the afternoon, once Tu Bai had finished with other matters, it would bring a few Horned Bunny craftsmen to move the manufacturing machine into the pharmacy, so Qi Ye did not need to worry too much.

Qi Ye did not intend to put high-tier Mental Energy potions on the market; such precious potions were naturally to be prioritized for his own people, striving to ensure every elite animal could have high-tier Mental Energy potions to drink.

However, those Otherworld firearms and ammunition could all be put on the market; he would let Rat One take the lead in contacting the military, preferably to sell them in bulk.

But, since he was going to sell to the military, why not just sell to the Yun Province Military Region?

Qi Ye suddenly thought of something, picked up the communication stone, and spoke to Chocolate: "Chocolate, has that twisted greatsword reached Old Zhong yet?"

Before returning to the Sacred Lake, Qi Ye had Da Huang return to Blue Star first to hand over the twisted greatsword to Zhong Jinrong.

"Lord, Old Zhong has already received it; he expressed his gratitude to you and the Sacred Lake."

Qi Ye smiled slightly: "That's good. I have another surprise to tell them. I have a batch of Otherworld firearms; if they want them, I can provide them at a price lower than the market rate."

Chocolate: "I will go ask for their opinion right away."

Hanging up the communication stone, Qi Ye flew to the side of the Item Manufacturing Workshop, where a small open space had been cleared in preparation for building the Elementary Item Research Institute.

"Good afternoon, Lord!"

A Green Water Lizard, who had been waiting there for a long time, greeted him.

Qi Ye extended his wing and placed the blueprint on the open space.

The materials that had been piled up on the open space like a small mountain automatically filled the gaps in the blueprint.

The Green Water Lizard immediately ran to the nearby warehouse and hauled out over 100,000 otherworld crystals in one go, filling the final gap in the blueprint.

As the dust settled, a semicircular arched building appeared before Qi Ye. Its gate faced the items in front, and its exterior walls were pure white, very similar to the scientific research center buildings on Blue Star, except it only had one floor.

The excess otherworld crystals automatically converted into the dungeon's energy.

Flying inside the Research Institute, a box of information popped up in Qi Ye's mind.

【Elementary Item Research Institute: Can reverse-engineer items below b-rank to produce blueprints. Currently available Otherworld energy: 3300 points.】

【Research c-rank item: Requires 100 energy and 10 five-color essence; research time is one day.】

【Research b-rank item: Requires 400 Otherworld energy and 20 otherworld essence; research time is four days.】

【Note: Additional Otherworld energy can be used to increase research speed.】

One energy point equals one otherworld crystal.

The required consumption for the Research Institute is ten times the resources obtained from dismantling items, but for the Sacred Lake's item output, this consumption is practically negligible.

At this moment, there was a circular pedestal in front of Qi Ye used for placing items.

Qi Ye took out a plasma grenade and placed it on the pedestal; soon, a pale yellow light curtain enveloped the grenade.

"Detected c-rank item, plasma grenade. Reverse engineering in progress. Research countdown: 24 hours."

Looking at the acceleration button on the pedestal, Qi Ye pressed it experimentally.

In an instant, the Research Institute's energy reserves dropped from 3300 points to 3200 points, and the plasma grenade's research duration was shortened from twenty-four hours to twenty-three hours.

Trading 100 energy points for one hour of acceleration—this price was still acceptable.

Qi Ye thought about it and decided to just accelerate the plasma grenade to completion all at once; including the research cost, it consumed a total of 2500 energy points.

Soon, the plasma grenade originally placed on the pedestal disappeared, replaced by a blueprint depicting the plasma grenade.

He gently touched the blueprint, and it turned into a beam of light that merged into Qi Ye's body.

Afterward, Qi Ye could fully apply it to the production line to mass-produce plasma grenades.

Currently, the item production line can produce items up to b-rank, which matches the Item Research Institute perfectly.

Afterward, Qi Ye again placed a b-rank Beast Hunting Rifle on the pedestal.

There was a large pile of similar firearm items in the warehouse; they were highly sought after by humans and would have no trouble selling.

This Beast Hunting Rifle required c-rank beast hunting rounds to be used, one shot per reload.

Just a single bullet could pierce armor made of mithril; even an Ironclad Demon would not dare to take a shot from it head-on.

For monsters below the fourth rank, as long as they had a head and a flesh-and-blood body, they could not withstand a single shot.

Qi Ye had already investigated; Xia Country had achieved mass production of beast hunting rounds, but the corresponding firearms were all b-rank, and none could be mass-produced.

Such firearms were only allowed to be held by Soldiers with the Ranger profession and were very precious.

If every Soldier on the battlefield could be equipped with such firearms, Xia Country's battle against the Otherworld invasion would not be so difficult.

And relying solely on the Sacred Lake's output was simply not enough to support the needs of so many people.

Looking at the four-day countdown display, Qi Ye hesitated for a moment before having the Green Water Lizard bring another 10,000 otherworld crystals to inject into the Research Institute.

Qi Ye consumed 10,000 energy points to turn the Beast Hunting Rifle into a blueprint.

10,000 energy points was equivalent to one day's income for the Sacred Lake, so it still pained him a bit.

Immediately after, Qi Ye did not use the Beast Hunting Rifle blueprint directly, but instead placed another Beast Hunting Rifle on it, letting it continue to be researched without further acceleration.

Staring at the blueprint on his claw, Qi Ye thought for a while and called for Rat One.

Compared to the produced items, the value of such tradable blueprints was the greatest.

"This is a b-rank Beast Hunting Rifle blueprint. You hand it over to the Otherworld Research Institute of Xia Country as a return gift from the Sacred Lake."

After obtaining a blueprint, an item maker could collect materials to manufacture it.

The output of such items was relatively low, but for an item maker, they only needed to obtain one blueprint to be set for life.

But this was not considered mass production, because the blueprint disappeared once used.

To achieve mass production, either that item maker had to possess a production line like Qi Ye's.

Or, the quantity of blueprints had to be sufficient to let every item maker have the same blueprint.

This was also the pursuit of Xia Country; the research at the Otherworld Research Institute was dedicated to achieving mass production of blueprints, so that they could assemble a group of item makers to jointly produce the same item.

For example, the most basic c-rank mithril longsword originated from the scientific academy's reverse-engineering achievements.

The Beast Hunting Rifle blueprint was, after all, a b-rank firearm blueprint, so it should be of some help to Xia Country.

"Understood! I will try to contact the Otherworld Research Institute of Xia Country!"

Rat One put away the blueprint and excitedly returned to the Embassy.