After checking the physical status of the main body of the floating city, Xia Duo speculated that it would not take more than ten days at most to start building the flight control system without worrying about the main body being affected.

"That's really good news, but why am I not so happy?"

Thinking of the Demon Restriction Treaty, how could Xia Duo be happy, no matter how reluctant he was, it would be difficult for him to resist this fact at this stage.

"Let's take one step at a time!"

For the long-term future, Xia Duo is very confident, but for the near-term future, all he can do is to concentrate his heart, be pragmatic, work hard to accumulate strength, and wait for the day when he really makes efforts.

……

After leaving Floating City, Xia Duo came to Fish-Man Island again, and now Fish-Man Island has become his territory, and the two fish-man tribes on the island have naturally become his subjects.

Now that the two fish-man tribes are no longer at war on a daily basis, although there has not been much communication yet, they have begun to recuperate.

After a while, Xia Duo found that the water and grass fields of the two tribes had expanded a lot, and the battlefield in the center of the island had also been divided, leaving only an empty one near the altar he had left before in the middle.

When Xia Duo "landed" on top of the altar, two fishmen quickly "flew" out of the nearby aquatic plants, one with green skin, dark back and light belly, while the other had silver skin, which became darker and darker the further down, and finally turned silvery-blue.

As soon as the two fishmen flew out, they shook their big heads and screamed "ahhhh

- Tribute, tribute!

"Heh, there's a tribute?"

At this time, it was difficult for Xia Duo not to notice the two small piles of snow-white pearls facing the altar, the powder of which had a certain healing effect when crushed.

After he showed his interest in pearls last time, he didn't expect these fishmen to be so knowledgeable, and he didn't even come to collect them, so he took the initiative to pay so much tribute.

However, Xia Duo thought that maybe it was because the members of the Tower of Time came to the Azurite Plane to build the field generation base supporting the [Mithera] device, and were seen by the fishmen, so this is the only one.

After thinking about it, Xia Duo still put away the two small piles of pearls, not that he was interested in these pearls, but just wanted to establish such a subordinate relationship.

Seeing that he accepted the pearl, the two fish-man guards shook their heads even more, and there was a feeling of joy in the psychic link.

- Steamed buns, steamed buns!

Xia Duo understood that these fish-men were of course not only interested in steamed buns, but actually interested in the surface food he had taken out before.

So, he took out a bun of steamed buns, bacon meat, and two barrels of low-alcohol ale from his personal space, which were originally used as dry food reserves, and then divided them into two portions and pushed them in front of the two fish-man guards.

Although he didn't know if the fish-man could drink in the water, it didn't hurt to try, and the gods had to give it something special.

After thinking about it, Xia Duo turned out two iron swords from the portable space, pushed them over to the two fishmen respectively, and told them in the psychic link:

- Bring back the food, and the iron sword will be rewarded to you!

The telepathic link transmitted the information accurately, and the two fishmen immediately let go of the food, and instead grabbed the iron sword and spun around in place several times.

- Thank you!

After that, Xia Duo didn't say anything more, and after breaking the spiritual link, he teleported away directly.

……

The back of Fish-Man Island.

Seeing the well-working [Mithera] device, Xia Duo couldn't help but breathe a sigh of relief in his heart, he hadn't come for more than ten days, and he was really worried that the device would blow up.

Of course, from the moment he saw Fish-Man Island, he knew that the [Mithera] device had not exploded, but it was more reassuring to see it with his own eyes.

After not coming for such a long time, Xia Duo did not rush to stop maintenance, but first came to the edge of the suspension field to check the positioning beads used for detection.

A ray of light hit him, and he soon discovered the deformation trajectory of the field, and after a little calculation, Xia Duo felt more at ease.

After more than ten days, the deviation of the positioning bead in the suspension field is very small, maybe it is caused by the air flow here.

If we want to reach the point where it will affect the normal operation of the [Mithera] device, at the current cheap rate, we will have to wait at least another month or two.

In other words, the maintenance cycle of the [Mithera] device can be extended to once a month in the suspended field alone.

It may actually be a little longer, but to be on the safe side, once a month is just fine.

Next, Xia Duo checked the stability of the Davy components in the [Mithera] device, and after confirming that there were no major problems, he began to gradually remove the locking settings in various places, preparing to stop and restart.

Shutdown is relatively more complicated than starting, and in the future, the [Mithera] device will be the main energy source of the floating city, and even if there is a backup device, it must be able to be shut down instantaneously as much as possible.

As the intense magical aura and the true glow of its operation faded, the Mithera device reverted to the shimmering glow of its own David.

It looks like a spherical luminescent jellyfish, and its body is filled with all kinds of luminous lines.

Then, Xia Duo put this large jellyfish, which has reached a height of nearly 100 meters, into his personal space, along with the cube adapter that looks like a breeding tank around it.

If it is in the Floating City, there will be multiple pedestals around the [Mithera] device.

During maintenance, you only need to switch to other bases to ensure that [Mithera] is in a gravity-free state at all times.

The so-called maintenance is actually to maintain the supporting facilities of the [Mithera] device, and the device itself does not require much maintenance, but more to shut down to release the internal pressure accumulated by continuous work.

This pressure is mainly for Davy strings, and if the materials are improved in the future, or if they are made by real magic web strings, then there will be no need for downtime.

In addition, there is a very small chance that an unstable Davy string may need to be replaced.

Of course, if you put aside the design problems, one day some Davy strings will become unstable and need to be replaced, and I am afraid that the whole unit will also reach the end of its life.

……

There is a field occurrence pedestal on Fish-Man Island, and Xia Duo naturally wants to check it carefully, if this only [Mithera] device is destroyed on the field occurrence pedestal, it will be a great loss.

This time, he didn't simply check it as he had just when he checked the physical properties of the floating city, but seriously, inside and out, almost every Mithril line was checked.

The energy buffer core of the field generation base was also specially replaced, that is, the arcane crystallization.

This thing is completely worthless to the current Xia Duo, and in just the past ten days, the Azurite Plane has accumulated Arcane crystals equivalent to hundreds of thousands of standard Arcane crystals.

Now that is the case, there will only be more in the future, at least until a way is found to consume it on a large scale, and it will be like water.

Then Xia Duo went to look at the [Mithera] device on the side of the vacuum,