Caspi was even more frightened, trembling more and more, and finally a fishy yellow liquid flowed out between his legs.

Aslan glanced at Caspi in disgust.

"You're a disgrace to the nobility. ”

Seeing this scene, Gus immediately breathed a sigh of relief, and it was obvious that Aslan disdained to do anything to Caspi.

"Go back and tell Governor Essin that I, Aslan, need an explanation. ”

Then the Flying Army pressed the garrison of more than 2,000 Calado City and went back to Flying City.

Thousands of troops came as they said they would, left as they said, and disappeared in a few moments.

The whole process only took half an hour.

As winter approaches, the breeze blows and the land is clear.

Caspi shuddered suddenly, he had just been scared out of a cold sweat, and now the cold wind was blowing, which made him a little shaky.

"It has to be rushed back as soon as possible. ”

Thankfully, Aslan didn't take everything with him, at least leaving Caspi with a horse and a few days of dry food.

On the war horse, Zhao Yun came to Aslan's side and took out a black wooden block about five inches in size from his arms.

"Lord, it's so convenient to have this machine. Zhao Yun looked at Aslan with awe on his face and said.

Aslan couldn't help but laugh.

The others also took out the black wooden blocks and nodded in agreement.

With this thing, you can be the first to know about the affairs of other towns in the future.

For example, today, even if Feisheng City lights up the wolf smoke to warn, by the time Feitian City sees it, it will be at least ten minutes later, and with this thing, as soon as they receive the information, they will assemble the team and set off, and the efficiency is not much higher.

"It's called the magic phone, I'm repeating it, if anyone still can't remember it, I'll confiscate their phone. Aslan said dissatisfied.

The others took their phones back into their arms, and even if Aslan wanted to, they wouldn't hand them in.

The so-called mobile phone was inspired by Aslan when Casivaro borrowed Aslan's communication crystal ball during the Battle of the Broken Sky Gorge.

The so-called communication crystal ball is actually engraved with a magic array in the crystal ball, and a lot of precious magic materials are added to be able to convey communication tens of thousands of meters.

Upon his return, Aslan studied the principles of the crystal ball with Raphael, and consulted Valondo, who had been living in seclusion in the castle's tower.

Valondo is worthy of the Holy Rank Magician, and immediately pointed out the communication principle of the communication crystal ball.

Through the magic array inside the crystal, the words are engraved and then launched onto another crystal ball, because the emission process is transmitted by magic light, which is equivalent to the speed of light, so that it can be transmitted to another crystal ball so quickly.

Although Aslan didn't know the principle yet, he instantly understood that the previous life was similar to this kind of thing, that is, the walkie-talkie.

Raphael is only a high-level magician now, and his combat power is still scum five, but in the field of magic research and alchemy, even Valondo can't help but praise when he sees it.

However, in order to transmit voice communication, not only does this 'walkie-talkie' have to be very huge, but also the internal magic array inscription is also very difficult, plus various auxiliary alchemy materials.

Such a crystal ball is time-consuming, laborious, and unacceptably expensive to make.

In the end, in the middle of the research, Aslan had the whimsical idea to use the signal tower as a transit station, and then the crystal ball was just engraved with a magic array that received magic light, and the result was really successful.

The communication crystal ball made in this way does not need to be so at all, and finally it is compressed to the size of a chip by Aslan, and then engraved with the fingerprint function from it, there is no way, Aslan does not have the ability to make such a complex number system, and can only use fingerprints to identify each person's number.

Of course, if you want to call someone, you must first copy the other party's fingerprint to the mobile phone, and then connect to the other party's mobile phone with the help of the fingerprint, which is a bit like the Bluetooth transmission function, you must get the password to transmit to each other.

Of course, this kind of teleportation is not without consumption, the signal tower must be made of huge magic crystals, so that it can continuously receive and shoot magic light, and the magic power of the magic crystals will also be consumed, so it is necessary to establish an automatic magic charging function.

In short, mobile phones are very cheap to build, but the maintenance cost of cell towers is very high.

According to preliminary estimates, the maintenance cost of a signal tower is more than 30,000 gold coins per month, and the effective distance of the signal tower established by Aslan is 50 kilometers in diameter, in order to cover the entire Flying City area.

Aslan built two signal towers, and the cost of one tower was more than 500,000 gold coins, plus a maintenance fee of 30,000 gold coins per month, which made Thiago, who was in charge of finance at the time, feel distressed and grinded his teeth.

Not counting the maintenance fee, how long will it take to recover the cost of this million gold coin investment.

Since the function of mobile phones has been researched, Aslan will naturally not forget the windfall income of mobile phone fees, otherwise simple maintenance funds can make Aslan vomit blood.

The second of each magic light is calculated, one copper coin per minute, against two people, and one copper coin is added for each distance across a tower.

Now Feiyun City, which is the farthest away from Feitian City, the charging price is only two copper coins a minute, and this price was set at that time, not to mention that Thiago did not agree, even Jace and Gus disagreed.

This price is too low, if you really have to charge like this, even if it is impossible to recover the cost after a hundred years, and the maintenance cost is not included in the period.

Aslan has always insisted on this price, of course, this price is for the Flying City area, except for this area, the price will be doubled.

However, Thiago and Jace were not optimistic about Aslan's invention, and if it were not for its unique military use, they would definitely have joined forces to dismantle the two model towers.

They never imagined that it was this kind of terrifying and cheap charge that would become the largest income of Flying City in the future, and there was no one, but it would take many years to come.

The first batch of mobile phones produced is very simple, limited to officers at all levels in Feitian City, of course, not in vain, one gold coin per person, in order to recover funds, this is forced to buy and sell, it doesn't matter if there is no money, pay in installments, and when the time comes, it will be deducted from the military salary.

In less than a day, Aslan sold nearly 100 mobile phones, and for the newly launched products, this sales volume has already made Aslan very satisfied.

At first, the officers at all levels of Flying Sky City complained about their complaints, but after using their mobile phones for less than two days, this dissatisfied voice quickly ended, because it was so convenient.

In particular, the officers who belong to various towns and cities, many of whom are old friends, used to have a very difficult time saying two words, and occasionally flew to the sky city together, but because they did not know the time of each other's return, they both missed it.

Nowadays, with mobile phones, everyone has no way to chat and meet for a drink, especially when two officers go to 'relax' for convenience, and every time they call on their mobile phones.