The morning of this day, as in previous days. I got up two hours early, took the semiconductor radio that had been improved by Panzi, and climbed to the top of the mountain. Since I came to school, I have been running to the top of the mountain every day, so I don't feel very tired with heavy semiconductors on my back.

When we reached the platform at the top of the mountain, the sun had not yet set out of the mountain, and there was a haze between heaven and earth. I sat on the floor, set up the antenna made of Panzi, put on my headphones, and began to practice listening.

It's in the heart of a huge mountain range, and I really don't know if I can pick up a long-wave signal at such a high place.

I carefully adjusted the knob, and there was a noise of whining and wawing in the headphones, and all kinds of radio noise filled it. I calmed down, pricked my ears, and listened.

Slowly, I could distinguish the news voice of the local radio station, as well as the traffic station of the Central Radio, talking about how congested the traffic in Beijing is now, I smiled bitterly, alas, you block yours.

Suddenly, in a frequency I was familiar with, there was a voice that I had never heard before.

Against the noisy background, the sound was faint, as if it was coming from a distant direction.

At first, it was the sound of fingers scraping the glass, and the listener was creepy, and then there was a sound of semiconductor FM transfquencing, like a ghost crying wolf. This lasted for about 5 minutes, during which the two voices kept changing each other, and I was a little upset, and I was about to give up the tracking, but I didn't expect the sound to suddenly disappear and disappear.

But then, there was a slightly clearer code sound coming from the headphones. As soon as I heard that it was Morse code, I listened carefully, and struck it on the stone with my right hand. Its code looks like this:

.. ---...--...--.-----......---...------.

Immediately after, it seems to have been repeated, I listened, found that it was a very ordinary code, and did not make improvements on the code, hungry, the second time to confirm that it was correct, I translated it.

23316239

I was silently thinking in my heart what the four sets of numbers really meant, this kind of message is very difficult to break, in the original time, the encryption of this kind of message is mainly to look at the code book, both sides of the sending and receiving telegram have a code book, the message is encrypted into numbers, and then sent out in Morse code. During this period, someone received it, there was no code book, looking at such scattered four groups, eight numbers, I don't even know who sent the report, according to such scattered information, even if it is the world's best deciphering master, it may not be able to do it.

At this time, Sally and Rego ran up with the team. Silly saw me sitting there alone in a daze, my hands still tapping on the ground. He walked over and asked, "You've been sitting like this for the past few days, have you made any progress in practicing?" ”

I waved my hand to stop him from talking, and continued to listen to the sound in the headphones, which no longer appeared. So he took off his headphones and kept tapping on the Morse code on the ground.

Sally thought I was strange, as if she was thinking about something, and stopped bothering me, and Panzi came over, and Panzi, a radio enthusiast, belched when he saw me tapping the stone

"Well, I said Captain, you're a Moss cipher, 23316239,"

I stretched out my thumb to him, Pan Zi this kid is really powerful, Pan Zi squatted down, looked at my method of sending reports, and said, "Can you determine the meaning of this code?" ”

I said I couldn't be sure, so I asked Pan Zi, do you understand, in addition to you radio enthusiasts, what are the departments in China that are using this kind of code?

Pan Zi thought for a while, and said: "If you don't imitate it wrong, this technique seems to be very individual, you know, the awesome listener will be able to determine the method of the generator according to the frequency of the radio wave sound and other characteristics, in the future listening, as long as you listen, you will know who is generating the wave." ”

As he spoke, he leaned near the semiconductor, looked at the pointer of the semiconductor FM, and said, "The civilian band is completely different from the method I heard when I played radio before." ”

Sally next to her looked a little indifferent, looked at the two of us, and said, "Are you two interesting?" Since it's a civilian band, it's very likely that it's a new enthusiast, why are you so grassy. ”

I think this is also the reason, maybe it is because our nerves are too hypersensitive.

Pan Zi also nodded on the side and said: "Maybe, such a short set of four sets of numbers, the amount of information contained is not clear, and it may also be the command signal of the train, fishing boat, etc." Alright, let's get the team up, Captain. ”

If it continues like this, it won't be interesting, so I picked up the guy and beckoned everyone to open the way. Get back.

Back to the class, I still have some absent-mindedness, I have been thinking about the signal I received today, everything else makes sense, but this started to send an alarm less than five minutes after it was turned on, and it was shut down immediately after the report, I still feel a little incomprehensible, it doesn't seem to be the habit of enthusiasts and civilians.

Thinking about it, his hand was on the table, and he involuntarily imitated the man's technique and tapped on the table.

I tilted my head while thinking about my own business, and what I didn't see was that the middle-aged female instructor on the podium saw my hand tapping on the table, and her face changed wildly.

After class, the instructor stopped me, and I said to myself, it's over, is this the rhythm of staying in class? This guy still doesn't let people live? Let's just say that my homework is a little worse, so it won't torture me like this.

The team members left the classroom one by one, and they all looked at me like a cherished one. Especially the mushroom head, he looked at me with pity in his eyes, and said to me in lip language: "Precious brother, pay attention to safety." ”

I smiled wryly and shook my head, I didn't know what the instructor wanted to do, the instructor saw that the students had withdrawn, and finally broke up Sally, I was inexplicable, and my heart was very bottomless.

The instructor looked solemn, and I didn't know what was going on, so he walked up to my desk and started tapping on the table in front of me with the pen in his hand, as if it was a simulated message

"Dada. Dada. Dadada"

When I looked at it, I was stunned, it seems that my feeling is right, this person who sent the report is not a simple road goods, and the instructor's methods are almost exactly the same as this person's.