Why did Yuki Yanagida have such a clear and profound memory of this pot of flowers? This must have a very important memory value for him.

What is the function? There are potted flowers everywhere on the windowsill of the house next to the street. Why is he the only one who remembers this pot of flowers? This must have a unique significance to him and may have a lot to do with his lurking task.

Ning Zhiheng also saw similar plots in his novels in his previous life. A pot of flowers is very common, but the meaning of placing a pot of flowers at a specific location and at a specific time is completely different.

If you guessed correctly, someone should have passed the message to him through this pot of flowers.

As for what kind of information is it? This is a pot of roses. Because of its long flowering period, roses are a very ordinary flower species in Nanjing, so there is nothing wrong with it.

But it must have some different meanings. All of this is for him to continue digging, but it is undeniable that this is definitely an extremely important clue.

So Ning Zhiheng is really embarrassed about how to use this clue now. He himself is unfamiliar with the means of criminal investigation cases in his past and present life, and has no experience.

Although he was meticulous, his time was too short to contact with agent intelligence, he knew very little about intelligence and criminal investigation, and had not undergone rigorous training, which was not his expertise.

What he is good at is only some combat knowledge he learned in the military academy for two years. It is still okay to participate in the operation team's mission with his shooting and fighting abilities, but intelligence reconnaissance is difficult.

In a department like the MIIS that is specially used to conduct agent activities, the agents who are most familiar with and good at are definitely the Intelligence Department. The only intelligence department officer he contacted was Huang Taoguang.

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

Because Ning Zhiheng could not explain how he got this clue at all, it was a clue that he had obtained by his own magical power.

Ning Zhiheng had a headache when he thought of this, but he had to try his best to remind Huang Taoguang. He decided to contact Huang Taoguang first and then acted at the opportunity. In order to be able to dig out other lurking Japanese spies, he had to do his best.

Ning Zhiheng rushed to the intelligence department again and asked about Huang Taoguang's office. At this time, Huang Taoguang was in the office, looking at the pile of materials in his hand, which was very troubled.

As the main person in charge of this Japanese spy case, after such a long time of hard work, he was still in vain and was just getting three cold corpses.

From his experience, he clearly knew that this was just a very small member of a Japanese spy team. The hidden organization behind him was not hurt at all.

No matter how this report is written, it is difficult for his boss to feel satisfied with such a result.

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

This young colleague from the operation team has only met twice, once in the last arrest of Fu Cheng, and the second time in the basement of the Torture Department not long ago.

However, as an intelligence officer, he has a very good memory. He remembers the information of this young officer, who introduced to each other when he first met. The young officer was named Ning Zhiheng. He vaguely heard that there was some background behind this person.

"Brother Ning suddenly visited, I don't know what it's important to do." Huang Taoguang enthusiastically invited Ning Zhiheng into the office.

Ning Zhiheng looked around and glanced at the stack of archives on his desk. It was probably archived information about the case of Yukiki Yanagi.

He smiled and said, "I have taken the initiative to come to the door because I want to ask for some advice. I hope Brother Huang will give me some advice."

"Oh, your brother has something to ask about. Please speak frankly, Huang said everything." Huang Taoguang responded enthusiastically. He turned around and made a cup of tea for Lin Zhiheng. He brought it to him, and the two sat opposite each other.

Ning Zhiheng thought for a moment and asked softly: "Brother Huang, I would like to ask. Based on your experience, what kind of role should Fu Cheng be in the spy organization? What kind of role does he play?"

Huang Taoguang smiled and nodded. He knew that Ning Zhiheng was a Huangpu graduate who had just been transferred to the operation team, and the Huangpu Military Academy had not conducted systematic training and professors on spy agents.

It can be said that the training and training of intelligence agents was not very mature at this time.

Many espionage methods and knowledge are difficult for others to understand unless they are professionals like them.

Since Ning Zhiheng has joined the MIIS, it is very appropriate and reasonable to learn more about this knowledge.

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

The country now lacks intellectual talents. He is very willing to popularize Ning Zhiheng's basic agent knowledge.

He smiled and replied: "We found a radio station at Fu Cheng's residence, which shows that he is a role specializing in transmitting intelligence. We have a common name for this type of person, which is "carry pigeon".

As a very critical link in the intelligence spy organization, the pigeon is also a transit station for the spy team and the spy headquarters to convey intelligence.

All the information will be summarized into his hands and conveyed to the spy headquarters. At the same time, he will also accept instructions from his superiors through the radio. Two Japanese spies were lurking next to Fu Cheng to support and cover him. You can imagine how important his identity is.

We usually call spies lurking within our government "moles". These spies are also valuable. They are usually successfully infiltrated by the enemy at a great cost. Their identities are even more resistant to inspection than real us and are highly concealed.

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

This reaction time will be very short, and then they will quickly enter the latent state, and then wait until they are determined to be safe, and they will obtain activation instructions through other agreed methods before starting a new action.

Such a way of action will increase exponentially for us to solve this case, and even the hope will be extremely slim."

Ning Zhiheng then realized that Yukihi Yanagi's role in the organization is very important. He then asked: "What methods do moles usually use to convey information to carrier pigeons?"

Huang Taoguang then patiently explained: "There are generally several types of information transmission according to what we have mastered.

The first method is to contact directly. Two people directly transmit information through the connection. This method is advantageous to be direct and effective, but it is also very dangerous. Using this method means that both parties must know each other and even know the hidden identity of the other party. Once you fail to grasp one of the links, you can follow the clues and find other organization members. This is also the most basic method.

The second method is to convey information in writing, and the mole directly sends letters to the pigeon. In the order of code and text set in advance, the information content is embedded in an ordinary letter content and delivered directly through the post office. This method is safer, but has great disadvantages. The time for sending letters will be long because the current postal management system is not strict, and the situation of delay or even loss of emails is very serious. If such a thing happens, it is impossible to control it at all, so this method is generally not used to transmit information.

The third method is to adopt indirect transmission, generally setting up a specific hidden place, which we usually call. The mole placed the information in the dead mailbox. The so-called dead mailbox is definitely a very secret place. In order to minimize the possibility of the dead mailbox being exposed, the carrier pigeon cannot often check whether there is any information. This requires the carrier pigeon to remind the carrier pigeon to receive this information through other methods. In this way, both parties do not contact at all, and do not know the other party’s age, appearance, and hidden identity. The advantage is that the transmission of intelligence is very safe. The disadvantage is that the procedures of this method are relatively cumbersome, which is very suitable for those intelligence with low effectiveness. It is not suitable for transmitting intelligence that is very urgent.

He even used the method of publishing a newspaper to convey information. The information content is also compiled into the articles published in the newspaper in the agreed code words and order.

This method was used a lot in the past few years. It is said that the underground party of the Red Party often used this method to convey intelligence. However, it is rarely used now.

Because this method is also quite risky, now everyone pays more attention to this aspect. Our Military Intelligence Department has a special team to conduct professional inspections of newspapers issued on the market, and will identify suspicious information if it is found."

After listening to it, Ning Zhiheng realized that the knowledge in espionage work was so profound, and there were many ways to do it. It was impossible to imagine if he didn't participate in it.

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

"This is also possible. According to the Japanese intelligence organizations we know, this situation is very rare.

Because this method has many disadvantages. As a mole, he can penetrate and even obtain our confidential information, so his identity must be an important member of the confidential information. These people are extremely important to spy organizations.

The price to raise such a spy is very high. Any such spy is precious to the organization. They will not allow such valuable agents to bear unnecessary risks.

Because the current intelligence and secret service departments have telecommunications departments that specialize in monitoring various radio stations. Just like our MIIS, we have telecommunications departments with relatively advanced equipment.

If they listen to unfamiliar radio signals, they will conduct a check. Determine the frequency and location of the sending of the report. Once the search is conducted, the radio will be easily exposed. It can be said that sending the telegram itself is relatively dangerous and there are still many risks.

Japanese spies are very rigorous in their work. They usually divide the work, moles obtain information and pigeons transmit information, so that risks can be shared in two links and the possibility of exposure is minimized.

The underground party of the Red Party seized by the Central Party Affairs Investigation Section last year was suspected of its identity because the lurking mole sent a report directly. However, the mole decisively swallowed his gun and eventually found nothing.
Chapter completed!