"What is this? A gift from Birdman?" Kuroki asked.

"I don't know, he didn't notify me before."

As he said that, he opened the box and saw three palm-sized black metal plaques inside.

The shape is a one centimeter thick rectangle, engraved with a crow pattern.

There is a button on it.

One of the signs is engraved with "1", and the other two are engraved with "2".

——

"What?"

The two of them looked puzzled at what was in the box.

But just at this moment.

"Ahhhh..."

The sign with "1" engraved on it began to make a shrill crow call.

The two of them were startled.

Kuroki became more and more confused, and Bai Yi couldn't help but think of "mobile phone".

He picked up the No. 1 sign and pressed the button on it.

Soon, the chirping of the birds stopped, and then came the voice of the bird merchant.

"Can you hear me? My wise Lord Brave."

"Did you invent this thing?" Bai Yi picked up the token and put it to his ear like a phone.

"It's a new invention. It's inspired by a tool in your world. It seems to be called..."

"cell phone?"

"Yes, that's it. This saying was passed down by a brave man long ago."

"sell?"

"Of course not, I just want to give the first generation of the product to my most respected customer. I think this will definitely remind you of the beautiful memories of your hometown."

"Are you sure it's not a test product?"

"What does it matter? Lord Brave, it's free anyway."

"Thanks, how do you use this thing?"

“Did you see the number on [the phone]?”

"I saw it."

"Only two stations with corresponding numbers can communicate with each other. If one presses the button, the other will make a sound.

There is only one call opportunity per day, and the call time is about five minutes, there may be errors."

"Is this one-time call opportunity available to each station?"

"no."

"Two units plus one?"

"Yes, you can only choose between making and receiving calls every day."

"It's bad enough..."

"Even so, there is still huge potential in this world. This is something that you, who have lived in the world of technology since childhood, cannot understand, my lucky hero."

"Okay, thank you. Another question, do I need to charge it? How long can it last?"

"There is only one charger, and I have it in my hand now, but a second one will be produced soon, and someone will send it to you then.

As for how long it can be controlled? We haven’t tested it yet.”

"I think you must have given this to me just to make it easier for me to order [takeout]."

"If you have any product needs, you can contact me and I will deliver them to you as soon as possible."

——

[Mobile phone] hung up, leaving Kuroki confused.

"What, what do you mean?"

Kuroki listened for a long time but didn't understand, so Bai Yi explained it to him carefully.

That's when it completely dawned on him.

After that, the two left the city wall, and Bai put three mobile phones into boxes, planning to put them in the storage world.

Unexpectedly, one of them didn't pay attention and his foot slipped.

Then he fell directly from the gap above the city wall.

"Hey!!!"

Fortunately, Kuroki had quick eyesight and quick hands, so he caught him and prevented the accident from happening.

"Be careful!"

"Thanks, I was shocked just now."

Although the person was fine, the box fell.

The two arrived at the scene immediately.

All I saw was that the box had been thrown open.

The two mobile phones fell aside.

Fortunately, the snow down here is relatively thick, so the phone was not damaged.

Bai Yi put the mobile phone back into the box, only to find that there were only two of them, and one number "2" was missing.

After that, Kuroki and I walked around the scene several times, but still didn't find anything, and we became more and more confused.

"Did it fall into the cracks in the city wall?"

The two of them checked up the city wall, thinking that it might have fallen in mid-air and was somewhere on the city wall.

But after searching for a long time, I still found nothing.

Bai Yi refused to give up and pressed the button on the second phone, trying to make the other phone ring a bell to reveal its location.

However, the scene was extremely quiet.

The No. 2 machine seemed to have disappeared out of thin air.

Gradually, it became dark, and the two of them had no clue and had to give up.

At night, Bai Yi lay in bed and tried to call the bird dealer on phone number 1, but he couldn't press the button.

As he said, you can only choose between making and receiving calls on the same day.

——

Bai Yi, who had no clue, could only fall asleep and think about it the next day.

Early the next morning, Bai Yi called the bird dealer to explain the situation.

I thought I would get the answer, but as the inventor, I was also confused.

"It's gone? There's no sound after dialing? This... shouldn't be..."

The bird dealer didn't give an answer, he just said he'd do more research and then hung up.

Bai Yi didn't have much to say, he just put another piece of "No. 2" in his hand to play with, hesitated for a while, and finally pressed it.

I thought there would be no response this time.

"Hello?"

Unexpectedly, a young female voice came from the phone.

"Hello?"

Bai Yi quickly answered the call and asked again:

"Who are you? Why do you have this thing in your hands?"

"Is this your thing?"

"Yes, you can bring him..."

"Then you have to be responsible for my injuries."

The other party interrupted Bai Yi and seemed not to realize who was on the other end of the phone.

"What's the meaning?"

"What do you mean? Humph! I was just jogging in the morning when I was suddenly startled by a bird's call. I fell down and broke my hands.
To be continued...