My client Li Yunlong

"As long as it is communication based on radio technology, whether it is direct voice calls or encrypted information transmitted by air waves, no matter how advanced their technology is, they must follow one principle."

Northern Review.

Technical room within the telecommunications department.

A bespectacled Japanese expert said:

“Both the receiver and transceiver must be on the same radio channel in order to communicate with each other and transmit information.”

"So as long as we find and lock this channel, we can monitor its communications."

"If it is a voice call, it can be directly interpreted. There is no possibility of encrypting the voice. If it is an encrypted radio wave, it can only be recorded and then handed over to the code-breaking team for decryption."

During World War II, the theory of integrated circuits did not appear. The primitive and huge components made the encryption of voice signals impossible even for top experts.

You know, in the 1970s, voice signal encryption technology began to appear.

Even during the Vietnam War, there were instances of verbal abuse across channels.

"Since the other party can communicate in real time and temporarily change the landing site, it must be a direct voice call."

Hearing this, Naoto Matsuzaki looked at the military expert who came from Imperial University.

The imperial intelligence department has fought so many times with the Tuba Road underground party lurking in Beiping, so it is natural that nothing can be gained.

In fact, on several occasions, the Special High School and the military intelligence department discovered the landing location of the Tubal Route Plane in advance and made arrangements, but in the end, the Tubal Route Plane did not land.

Obviously, Tubal Road has a timely warning system that can promptly notify transport aircraft of ground conditions.

"Our next task is to find the channels they use."

the technologist continued.

At this time, his tone became solemn:

"However, we can know from the captured communication equipment of the Eighth Route Army that their radio stations have a manual frequency hopping function, and they have hundreds of preset channels, which can quickly implement manual frequency hopping."

"And our equipment, even though it uses components imported from the United States, requires manual frequency adjustment, and the frequency hopping speed is far inferior to the equipment of the Eighth Route Army."

"Much faster than us."

"The time left for us to lock down is very short."

"However, adjusting to the same channel, even if there is a preset channel list, will take at least five or six seconds."

"What we have to do is find each of their channels and find the rules for them to adjust their channels."

"Gentlemen, please!"

At the end of the sentence, the Japanese technical expert suddenly bowed and begged.

"Hi!"

In the conference room, dozens of Japanese radio experts or technical soldiers all bowed their heads in response.

For a time,

The enemy's morale is as high as a rainbow.

Everyone, including Matsuzaki Naoto, believed that they had a winning chance in this battle.

Also normal.

After all, those here at this time are all top experts in Japanese radio communication technology, including many top talents studying in the United States, Germany, and the United Kingdom.

The equipment is also the latest radio tracking equipment researched by the empire.

Can accurately find the radio stations where enemies are lurking.

It was originally prepared to cooperate with the military to find the headquarters of the Eighth Route Army and the location of the enemy's headquarters, but now it is used to find the communication equipment for the Tubal Route aircraft.

"Seize it as completely as possible."

Finally, the leader of this group of Japanese technical experts said to Matsuzaki Naoto:

"We need their complete equipment."

"Used to study their technology, find their technical weaknesses, imitate their equipment, and improve the empire's technological level."

"And, in exchange for resources."

As a military technical expert, he knew that the empire used the captured Tubal advanced weapons as bargaining chips to exchange financial and material commercial transactions with the United States.

"Hi!"

Although the expert was only a lieutenant in terms of military rank, Matsuzaki Naoto did not dare to neglect and quickly agreed.

···
That night.

"take off!"

Taiyue base area.

airport.

Under the command of the airport officials, the five Y-5s slowly started their engines, and then flew along the runway in the direction of Beiping.

at the same time.

A kind of base area between Taiyue and Beiping.

"Turn on the generator."

"Turn on the navigation signal."

In various places, guerrilla captains dispatched directly from the headquarters turned on secretly carried communication beacons and deployed antennas.

Consider the safety and confidentiality of navigation equipment.

The headquarters did not hand it over to the base areas in various places. Instead, the headquarters sent people directly, including members of the troops directly under the headquarters and members of the independent regiment, to be responsible for security and opening, and to maintain vigilance at all times. If there are any problems, the equipment would be destroyed as soon as possible.

This is also the reason why the communication and navigation beacon has not been seized by the Japanese in the face of the crazy search by the Japanese.

of course,

The struggle between the two sides around the navigation beacon, although small-scale and little-known, is as cruel and bloody as the frontal battlefield.

···
"According to the time, the transport plane has already taken off."

Half an hour later.

Northern Review.

Vincent opened his watch, looked at the time, and said.

Then, he looked at several familiar underground party comrades aside and couldn't help but smile.

Although the Japanese suppressed them like crazy,

But as the saying goes, today is different from the past.

Abundant funds will help those lurking in the rear far more than the frontline troops. They can even be as cunning as they are.

Identities can be diverse and change at will.

As long as you are willing to spend money, you can even forge dozens of identities in one day, and a piece of information can even be delivered more than a dozen times.

You can even bribe insiders of the Japanese to help.

It is precisely because of these reasons that the intelligence power of the Beiping has not weakened, but has even been greatly strengthened. From May to now, more than four months ago, not a single core member has been captured by the Japanese.

This was simply unimaginable before.

"Turn on the navigation beacon!"

Vincent ordered.

"Yes!

Some comrades immediately went to implement it.

After all, this is the base camp of the Japanese North China Front, so we still need to be vigilant. The navigation beacon for the transport aircraft is located near the landing point in the suburbs, far away from the inner city of Beiping. "Are the preparation landing points ready for today?"

Then Vincent continued to ask.

Unlike at the beginning, the Japanese didn't know that the army had planes to transport supplies, but now the Japanese are keeping a close eye on them.

Fortunately, there are three cunning rabbit caves.

Each time, four to five landing spots are prepared.

"Ready."

Some comrades answered immediately.

"Turn on the communication radio."

Finally, Vincent personally opened the latest second-generation communication radio sent from the headquarters - compared with the first generation, it is much smaller and the battery is more durable.

And according to the orders of superiors.

Two months later, the second generation of navigation beacons with fast automatic frequency modulation function will also replace the first generation of navigation beacons.

By then, the Japanese would no longer be able to track the signal.

···
"Target signal found."

"It should be the enemy's aircraft navigation signal."

A few minutes later.

In the Japs' telecommunications technology room, a Japs wearing headphones looked at the waveforms on the black and white screen and shouted loudly.

"Discover navigation signal?"

Matsuzaki Naoto was immediately overjoyed.

Although part of the reason for the conflict between him and Suzuki Fanji was that he was worried that after Tuba Road obtained those foreign materials, machinery and equipment, its strength would greatly increase, which would harm the interests of the Locust Army.

But in the final analysis, he was seriously rewarded by Suzuki Hoji.

Not only did he obtain a large amount of funds for the empire, he also made a lot of money himself, and was even promoted to major general.

And he is a major general with real power.

"Can I track the position of the positioning signal?"

Matsuzaki Naoto asked immediately.

He looked expectantly.

It is worthy of being the Empire's latest advanced radio detection equipment, and worthy of being the Empire's top telecommunications personnel.

Not long after arriving, the enemy's signal was discovered.

"Start locking and positioning."

The Japanese technical leader with the rank of Lieutenant Colonel in charge of the command repeated Matsuzaki Naoto's order.

"Hey, start locking."

Dozens of Japanese technicians began to operate in front of this huge machine, ticking.

"Lock failed."

"Lock failed."

"···"

But in the face of Matsuzaki Naoto's expectant gaze, the Japanese technicians, these so-called top technical experts, spat out words about lock failure.

"what happened?"

Matsuzaki Naoto didn't understand.

Why can't you lock the position even though you've discovered the enemy's signal?
Back then, it was not so difficult for the First Army to locate the Tubal Road headquarters.

No one answered Matsuzaki Naoto's doubts. In other words, even these technical experts did not understand why the lock failed.

It wasn't until more than half an hour later that the person in charge at the level of Lieutenant Colonel answered Matsuzaki Naoto's doubts:

"Why··"

I saw this person sighing first, and then said:

"Their navigation signals are discontinuous, and always fluctuate rapidly between nearly a hundred frequencies. The beating frequency is extremely fast, and we are temporarily unable to lock it."

The technical director of the Japs took it for a while.

But this time, the tone is serious.

"this··"

Matsuzaki Naoto didn't understand, but he felt greatly shocked.

"But··"

"how did you do that?"

"How did you do it?"

The Japanese technical leader at the rank of Lieutenant Colonel began to mutter to himself:
"How did they do that?"

Apparently, there was more going on than he imagined.

"what?"

Matsuzaki Naoto didn't understand.

"Theoretically, although the continuous and rapid fluctuations between nearly a hundred frequencies can interfere with our locking, it is not difficult. Just spend more time."

"but··"

"Their navigation signal is a rapidly rising and discontinuous signal!"

"How can this be?"

"Rapid fluctuations and discontinuous signals, what's the problem?"

Matsuzaki Naoto, who didn't know much about technology, continued to ask.

"Theoretically, it's not difficult to achieve. Just turn on and off quickly, or quickly adjust the current to achieve a sharp change in power."

"But the requirements for components are extremely high, and the components must withstand repeated large currents."

"How do they ensure that the tubes are not burned out?"

The leader of the Japanese technical experts explained as if talking to himself.

"That is to say."

"Their navigation equipment and components are very advanced?"

Naoto Matsuzaki got the point right.

Matsuzaki Naoto can understand this.

Just like the Arisaka rifle bullets of the Eighth Route Army, due to the materials and manufacturing process, they are very lubricated. The Imperial machine guns can even be used without oil.

The probability of getting stuck is much, much lower.

There are also Tubal artillery guns, which have lighter but harder barrels, more propellants, higher chamber pressures, harder shells, and more powerful explosives at the same weight.

"Correct."

The Japs technical leader seemed to finally accept the reality. He nodded and said:

"Very advanced."

"It can switch on and off continuously without interruption, and the power peak changes so drastically and rapidly. Its manufacturing technology is beyond our theoretical system." (End of this chapter)