"Half an hour ago, a sneaky and suspicious guy came over. Then he went to the advertising wall, took out a poster, posted it directly, and then left in a hurry." Wang Gezhi said in a simplified manner.

"Did you find that the two posters are different?" Chu Mufeng asked in a solemn voice.

"Yes, yes, you said it right, it's different!"

He raised his hand and gestured to his chest. Wang Gezhi continued, "The previous poster was nothing on the officer's chest, and the poster that was pasted on later had a round medal on his chest."

medal!

With a clapping hand, Chu Mufeng inferred: "The problem really lies in the poster pattern."

"If I guess correctly, what is posted here is a request for meeting, and the round medal posted later gives a signal of meeting."

"There are many people coming and going there, and I believe no one will pay special attention to this poster. It is really difficult to detect when they use this as a signal."

"If you guess correctly, people in the courtyard will go to see it early in the morning tomorrow. If you see this poster with more medals, you will pass on the information tomorrow." Chu Mufeng said in a deep voice.

"Well, nine out of ten!" Wang Gezhi said deeply.

"Captain, what if the poster posted fell out? Or was it torn? Isn't this just useless work? In that case, how can they confirm the contact?" Pei Dongchang questioned a little.

"Dongchang, the possibility of the situation you mentioned is slim!"

Chu Mufeng, who got another clue, was in a good mood and patiently explained: "First of all, you have to know, that is, the poster advertisements on the message wall will only be covered, but no one will take the initiative to clean up."

"The second is the weather. Do you think that if the posters posted fall off casually in a weather like today, there is no wind or rain?"

"The third is time. That person went out to post the poster in the evening. At this time, basically no one came to post the poster again. Even if it was posted, it would not completely overlap with his. In just one night, they could confirm the news!"

"The fourth and most important thing is that there should be a fixed time point in contact between them. You wouldn't think that guy in the yard went out casually, right?"

"So even if there is any problem, they can make timely remedies. Once the time is exceeded, they will adopt other corresponding strategies."

Speaking of this, Chu Mufeng saw Pei Dongchang's thoughtful look and smiled slightly and continued to add: "Besides, do you think this kind of poster is full of the street?"

"I dare say that the only ones in the entire Peking City use this kind of poster to deliver messages, and printing factories will not have this style. With such a premise, do you think there will be problems with the poster?"

"Captain, I understand!" Pei Dongchang nodded and said.

"Just understand!"

Chu Mufeng looked sideways at Wang Gezhi: "That guy, have you arranged someone to follow me?"

"After making arrangements, once you find out where the other party is staying, you will come back to report." Wang Gezhi nodded and said.

"Okay, then let's wait for the news first!" Chu Mufeng was completely sleepy.

In less than half an hour, the team members responsible for tracking came back to report and had determined the other party's position.

The guy made a big circle outside and then returned to a shop called Wenyuanzhai, which does the business of pen, ink, paper and inkstone.

"In order to avoid alerting the snake, we did not stay there for a long time, nor did we ask people nearby for inquiries."

"Well, you guys did a good job!"

Chu Mufeng nodded secretly. It was absolutely wise to do so, so as not to inform others and cause any change.

"Okay, let the brothers accumulate energy and wait for tomorrow! As long as they meet tomorrow, they will be arrested on the spot."

After all, when facing professional spies, he must be very vigilant. Choosing to act in the dark may not be a wise move. In order to avoid uncertain accidents, Chu Mufeng made a decision.

"Yes, captain!"

Everyone is full of fighting spirit and mood.

...

No words all night.

In the early morning, the night had not completely receded, and when the vendors who were leaving the stalls started to move tables and benches, Zhao Jiehui came out of the courtyard.

After looking at the empty streets, he collected his collar and trotted all the way to the news wall.

When he saw the poster with a medal on his chest, a relaxed smile appeared on his face, and he turned around and walked back.

He could not even notice that in the dark shops on both sides of the street, there were several pairs of eyes staring at his every move.

It's eight o'clock in the morning.

At the same time as yesterday, six people walked out of the yard in turn, and Zhao Jiehui, who was responsible for the staying behind, also came out.

After seeing him appear, Chu Mufeng, who had been guarding the window, put down his telescope and squinted his eyes slightly. If he guessed correctly, he should have to pass on the information.

After Zhao Jiehui also left, Chu Mufeng immediately issued an order.

"Wang Gezhi, go and follow me and see if he meets the people from Wenyuanzhai!"

"Song Dabao, go and collect the relevant information about Wenyuanzhai immediately."

"Pei Dongchang, please let your brothers keep an eye on the whereabouts of the other five people!"

"yes!"

All three of them respectfully took the order and left.

As for Chu Mufeng, he brought Huang Shuo and others to the gate of the Siheyuan. Since he had been confirmed that there was no one inside, he only needed to do one word: Search!.

"If you find someone coming, take it down directly, don't be polite!" Chu Mufeng ordered in a deep voice.

"Yes, captain!" Huang Shuo said respectfully.

Then Chu Mufeng climbed over the courtyard wall, entered the courtyard, and headed straight to the main house.

He must now search as soon as possible whether there is valuable intelligence evidence here.

After gently pushing open the door and walking into the room, Chu Mufeng couldn't help but smile.

He found that he seemed to be thinking too much and didn't have to search and collect evidence at all, because the house was full of boxes, and there were information placed in an orderly manner.

Each box has categories written in categories: economy, people's livelihood, prices, transportation, geography, security, water conservancy, electricity, cultural relics...

It is classified into categories and is quite complete, just like a small library.

There are also many maps hanging on the walls, including the entire city of Peking and various districts. No matter which map it is, they are all clearly marked with the street name.

Although there is no military defense map here, the map of Peking City can be marked so clearly that once a war occurs, it will be a certain opportunity to seize.

"Damn Japanese spies, have they started planning Beiping City now?"

Gripping his teeth, a cold feeling emerged from Chu Mufeng's heart.

If there were speculations before, then now it is 100% certain that these guys are the intelligence collection team of the Japanese invaders, and what they do is prepare for invasion of Peking.

"There is the least military intelligence here, and it seems that this aspect should not be their focus."

Chu Mufeng picked up a booklet for water conservancy in Huayu District and looked at it. He found that the information clearly marked the distribution of wells in Huayu District, Peking City, as well as the arrangement of groundwater trench and branch ditches.

If this is to cause destruction, who can defend against it?

One thing is done, one thing is accurate.

And they obviously wouldn't just collect one area, and the information from other areas is definitely being collected.

Just water conservancy is so detailed, but in other aspects, it is really terrifying!

Shaking his head, Chu Mufeng temporarily waved away the chaotic thoughts in his mind, and continued to search the room. He wanted to see if there was a radio station here?

If you can find a radio station here and it is best to find a password book, then the contribution will be extraordinary, a great achievement.

And his intuition told Chu Mufeng that there should be a radio station here.

How could a spy team that can be independently established have no radio station? Otherwise, if there is an emergency, you need to pass on information immediately?

If there is, where would it be hidden?

With this strong purpose, Chu Mufeng stood in the middle of the house and glanced around.

He doesn't like the feeling of blind people touching elephants. There is something, there is nothing, there is nothing. It is better to calm down and analyze it carefully than to find it blindly.

If I were myself, where would I hide the most important thing?

In the box all over the floor?

In the cabinet by the window?

Under the wooden bed?

"Wait, is it here?"

Chu Mufeng suddenly looked slightly and walked quickly to a bookshelves against the wall in the room.

He just glanced at him and didn't pay much attention to it. Now he looked at him for a few more times and found that the bookshelf seemed to be incompatible with the whole room, and the bricks on the ground seemed to be different from other places.

Although there are some books on the bookshelf, the most conspicuous one is the bronze vase.

Chu Mufeng reached out and grabbed the vase, couldn't lift it up, and twisted left and right. Then he heard a crackling sound, and the bookshelf moved away to both sides, revealing the secret room inside.

There was only one table in the narrow secret room with a radio station on it, and next to it was a password book. There was nothing except these.

When he saw these, Chu Mufeng looked happy, and he knew that he had guessed it right!

This time, not only can we catch big fish, but we can also dig out treasures.

As long as you have this password book, the credit will be huge this time.

I remember when I was in the police academy, the teacher once said that the password book is the soul of the radio station, but so far, we know very little about the Japanese code book. Any Japanese code book obtained is a great achievement.

Not to mention that a radio station was also acquired here, and countless information!

Chu Mufeng directly picked up the radio station and the password book, then came to the door, and asked Huang Shuo to open the door.

The moment the door was pushed open, Huang Shuo saw the radio station in his hand, and he exclaimed: "Captain, there is really a radio station inside!"

"That's right!"

A cold light flashed in Chu Mufeng's eyes: "It's now certain that this is a spy team of the Japanese invaders. They not only collected various intelligence information from all aspects, but also equipped with radio equipment."

"So, there is no need to wait anymore! I will go to Wenyuanzhai now, and you will inform me immediately and let the brothers close the net."

"Yes, captain!" Huang Shuo responded with his hands ready to beat.
Chapter completed!