Why does Yuki Yanagida have such a clear and profound memory of this pot of flowers? This must have been of great memory value to him.

What does it do? There are potted flowers everywhere on the windowsill of the house on the side of the street, and why he only remembers this pot of flowers so much, this must have a unique meaning for him, and it is likely that it has a lot to do with his hidden mission.

Ning Zhiheng was in the spy war drama in his previous life, and he also saw a similar plot in the novel, a pot of flowers is very common, but the meaning of placing a pot of flowers in a specific place and at a specific time is completely different.

If I didn't guess wrong, someone should have sent him a message through this pot of flowers.

What kind of information is it? This is a pot of moon flowers, and because of its long flowering period, it is a very common flower species in Nanjing, so there is nothing wrong with it.

But there must be something different. It's all up to him to dig into, but there's no denying that it's an extremely important clue.

So how to use this clue now, Ning Zhiheng is really difficult. He himself was very unfamiliar with the methods of criminal investigation in his previous life and in this life, and he had little experience.

Despite his meticulous mind, he has only been exposed to agent intelligence for a short period of time, has little knowledge of intelligence forensics, and has not undergone rigorous training, which is not his specialty.

All he was good at was some combat knowledge that he had learned in two years at military school. With his shooting and fighting skills, it is still possible to participate in the tasks of the squad, but there are some difficulties in intelligence detection.

The Military Intelligence Department, a department that specializes in carrying out secret service activities, is definitely the Intelligence Section that the agent is most familiar with and good at. The only intelligence officer he came into contact with was that Huang Taoguang.

So how to skillfully reveal this clue to Huang Taoguang and let him continue to investigate, this has become a difficult point.

Because Ning Zhiheng couldn't explain how he got this clue at all, it was completely a clue he got with the magical power of the Bodhi tree.

What's more, he didn't want anyone to know about the existence of the Fei Bodhi Tree at all, which was the biggest secret in his past and present lives. It is also the foundation of his survival, and it is the natal magic weapon that he can live in peace. He would never reveal anything to anyone, not even those closest to him.

Thinking of this, Ning Zhiheng had a headache, but he had to try his best to find a way to remind Huang Taoguang. He decided to get in touch with Huang Taoguang first, and then act on the opportunity, and in order to be able to dig up other Japanese spies lurking, he had to go all out.

Ning Zhiheng rushed to the intelligence department again and inquired about Huang Taoguang's office. At this time, Huang Taoguang was in the office, looking at the pile of materials in his hand and having a headache.

As the main handler of this Japanese spy case. It took so long to work hard, but in the end, it was still a bamboo basket to draw water, and it was just three cold corpses.

With his experience, he clearly knew that this was only a very small part of the Japanese spy team. The tissues hidden behind him were not broken at all.

No matter how the report is written, such a result is difficult to satisfy his superiors.

At this time, there was a knock on the door, and when he opened the door, he saw that it was Ning Zhiheng standing at the door, which surprised him very much.

This young squad colleague. He had only met twice, once in the last arrest of Fu Cheng, and the second time in the basement of the torture bureau not long ago.

However, as an intelligence officer, he has a very good memory. He remembered the information of this young officer, and he had introduced them to each other when they met for the first time, this young officer's name was Ning Zhiheng, and he had vaguely heard that there was some background behind this person.

"Brother Ning came to visit suddenly, I don't know what to do." Huang Taoguang enthusiastically invited Ning Zhiheng into the office.

Ning Zhiheng looked around, and swept the stack of archives on the desk at a glance. It is estimated that it is the archival information about the case of Yuki Yanagida.

He smiled and said, "I took the liberty to come to the door because I wanted to ask for something." I also hope that Brother Huang will give advice. ”

"Oh, your brother has something to inquire about. Please speak up, Huang knows everything. Huang Taoguang responded enthusiastically, and he turned around and made a cup of tea for Lin Zhiheng. The two sat opposite him.

Ning Zhiheng thought for a moment and asked softly, "Brother Huang, I want to ask." Based on your experience, what kind of role should this Fu Cheng play in the espionage organization? What is his role? ”

Huang Taoguang smiled and nodded, he knew that Ning Zhiheng was a Whampoa graduate who had just been transferred to the action team, and the Whampoa Military Academy had not systematically trained and taught espionage agents.

It can be said that in terms of training and training of intelligence agents, the government of the Republic of China at this time was not very mature.

A lot of espionage methods and knowledge, unless it is a professional like them, it is difficult for others to understand.

Since Ning Zhiheng has joined the Military Intelligence Department, it is very appropriate and reasonable for him to know more about this knowledge.

Huang Taoguang admires young people like Ning Zhiheng, such people, knowledgeable young people are good at learning, like to learn, and they are very willing to learn new knowledge.

There is a great shortage of intellectual talents in the country today. He was very willing to popularize basic agent knowledge to Ning Zhiheng.

He replied with a smile: "We found a radio station in this Fu Cheng's residence, which shows that he is a character who specializes in transmitting information." We have a common name for this type of personnel, which is "carrier pigeon".

As a key link in the intelligence and espionage organization, the carrier pigeon is also a transit point for the spy team and the spy headquarters to transmit information.

All the information will eventually be collected into his hands and transmitted to the spy headquarters, and he will also receive instructions from his superiors through the radio. There were also two Japanese spies by Fu Cheng's side who were specially lurking to respond and cover him. You can imagine the importance of his identity.

We often refer to the spies who are embedded within our government as "moles." This type of spy is also very valuable, they are usually infiltrated by the enemy at great cost, and their identities can withstand inspection even more than the real Chinese personnel, and they are very hidden.

A spy group can have one or several moles, but only one pigeon. Because of its importance, Fu Cheng's arrest this time will definitely alarm the other members of this group.

This reaction time will be short, and then they will quickly go into a latent state, and then wait until it is safe to do so, and then they will obtain the activation command through other pre-agreed methods before starting a new action.

This kind of action will make it exponentially more difficult for us to solve this case, and even the hope is extremely slim. ”

Only then did Ning Zhiheng know that Yanagida Yuki's role in the organization was very important, and he then asked: "What are the ways in which moles usually transmit information to carrier pigeons?" ”

Huang Taoguang then patiently explained: "According to what we know, there are generally several kinds of information transmission.

The first way is the way of direct contact. Two people pass through the connector and directly transmit information. The benefits of this method are straightforward and effective, but it is also more dangerous. In this way, it means that both parties must know each other, and even know each other's hidden identities. Once you miss one of the links, you can find other members of the organization. This is also the most basic way.

The second way is to send a message in writing, where the mole sends a letter directly to the carrier pigeon. According to the pre-set code and text order, the intelligence content is embedded into an ordinary letter content through the post office direct delivery, this way of security is better, but the disadvantage is great, the letter delivery time will be very long, because the current postal management system is not strict, the mail delay or even the loss of the situation is very serious. If something like this happens, it's impossible to control it at all, so it generally doesn't pass on information in this way.

The third is to take the indirect way of transmission, which is generally to set up a specific hidden location, which we usually call a "dead mailbox". The mole placed the information in the dead mailbox, the so-called dead mailbox, must be a very secret place, in order to minimize the possibility of the dead mailbox being exposed, the carrier pigeon can not often check whether there is any information. This requires the mole to remind the carrier pigeon to pick up this information in other ways. In this way, both parties do not contact each other at all, and neither knows the age, appearance, or hidden identity of the other party. The advantage is that the transmission of information is very secure. The disadvantage is that this method is more cumbersome, which is suitable for those information that is not very effective. It is not suitable for transmitting information that is urgent.

It even used the method of publishing newspapers to convey information. It is also to compile the content of the intelligence into the articles published in the newspaper according to the agreed code words and order.

This method has been used a lot in previous years, and it is said that the underground party of the Red Party often used this method to transmit information. But now it is rarely used.

Because this method is also more risky, now everyone pays more attention to this aspect, and our military intelligence department has a special team to conduct professional inspection of newspapers issued on the market, and if there is suspicious information, it will be screened. ”

After listening to it, Ning Zhiheng realized that the knowledge in espionage work was really too deep, and there were various methods, and it was impossible to think of it without participating in it.

"Is it possible that the mole itself has a backup radio station. After receiving the information, it is sent directly to headquarters. Ning Zhiheng thought of a more direct way again, and continued to ask unwillingly.

"This is also possible, as far as we know about the Japanese military spy organization, this situation is very rare.

Because there are many disadvantages to this method. As a mole, who can infiltrate and even obtain our confidential information, then his identity must be an important member who has access to confidential information, and these people are extremely important for the spy organization.

The price to pay for cultivating such a spy is very high. Any such spy is invaluable to the organization. They don't put such a valuable agent at unnecessary risk.

Because the current spy department has a telecommunications department that specializes in listening to various radio stations. Just like our military intelligence department has a telecommunications section with relatively advanced equipment.

If they hear an unfamiliar radio signal, they will check it out. Determine the frequency of the report, the range of locations. Once a search is carried out, the radio station is easily exposed, and it can be said that sending a telegram itself is more dangerous, and there are still more risks.

Japanese spies are very rigorous in their way of doing things, and they usually have a division of labor, with moles getting information and carrier pigeons passing on information, so that the risk can be shared between the two links and the possibility of exposure can be minimized.

The Red Party Underground Party that was seized by the Central Party Affairs Investigation Bureau last year was suspected of identity because of the direct report from the lurking mole, but the mole was very decisive in swallowing a gun and committing suicide, and in the end nothing was found.

There are many other ways to transmit information, there is no fixed way, everything will depend on the actual situation. Huang Taoguang continued to explain clearly.