?The west of this location is Bajiaojing Street, but on the east side is a mound of wasteland, which is thirty meters apart, which is exactly what Yu Cheng mentioned.

According to Ning Zhiheng's inference, before the Intelligence Department was preparing for a large-scale search, Yan Yichun knew that the pigeon was about to be arrested, so he quickly notified the Special High School Textbook Department, letting the Japanese know about this operation, and urgently activated the alarm device, namely the Liangta Takano and his wife.

Kono came here as soon as possible and carved a clear triangle on the east side of the cypress tree as required, which was an early warning signal that had been agreed upon before.

When the pigeon saw this signal, he immediately realized that he was about to be exposed. He transferred the radio station in time and prepared to deal with the search. As a result, the intelligence department searched and found nothing in the end, allowing the pigeon to escape this crisis by chance.

Before, Ning Zhiheng did not notice the special location of this signal when interrogating Takano Liangta. He just simply thought that this mark was for the target to see when he passed by the street. But now he understood that the other party did not have to leave the house at all. He just needed to use a telescope to clearly see the mark with a telescope in the residence of Xiangling Lane. Even if he had good eyesight, he could see it without a telescope.

Now, you can go to Yingling Lane to take a look at the cypress tree next to Ning Zhiheng based on this location. Then the residents may be a carrier pigeon.

Because the radio signal has been transferred, check whether the residents of these houses have moved out, so that the target of suspicion can be greatly reduced from fifty-eight households to a few or even fewer. In this way, the investigation will be twice the result with half the effort!

Ning Zhiheng and his team members rushed to the entrance of the ringing lane. Soon, a police chief from the police station who received the notice rushed over with the security police.

I saw Ning Zhiheng and his group from afar, and they ran over quickly.

When he ran to his side, the sheriff quickly stood attentively and said breathlessly: "Sir, we are ordered to cooperate with your investigation and follow your instructions."

Ning Zhiheng nodded and ordered: "You just need to take us to the ringing alley and check at the homes of several residents. Do you understand?"

"Yes, I understand!"

The sheriff quickly led the way and led Ning Zhiheng and his party into the ringing lane. This was a narrow alley with many residents on both sides.

Ning Zhiheng pointed to the residents on the west side and said, "Only check the west side and check it from house to house immediately!"

Because only residents on the west side could see the cypress tree, Ning Zhiheng ordered the police quickly knocked on the residents on the west side one by one in order, allowing Ning Zhiheng and others to enter the inspection.

When these residents saw that a group of soldiers and police came to the door, they were so scared that they dared not speak out and hid far away.

After Ning Zhiheng entered the room, he just came to the window on the west side to check whether he could clearly see the location of the cypress. Soon he found that the pile of wasteland in front of the cypress blocked his view. The residents on the first floor could not see the location of the cypress, or could only see some of the trunks, and could not see the triangle he had just engraved.

He immediately called the sheriff behind him and asked, "How long has this loess mound been here?"

The sheriff touched his head, and he answered truthfully, "It's been a few years, but no one has ever taken care of it."

In other words, this wasteland mound existed in June last year, so for residents on the first floor, there was no alarm signal.

So Ning Zhiheng specialized in finding houses with two-story buildings. Sure enough, the high-level houses could clearly see the triangle signals on the cypress trees.

There are not many such houses, only four families, and soon all the residents of these four families were brought to Ning Zhiheng.

Ning Zhiheng tried his best to slow down his tone and asked with a pleasant look: "Don't worry, we are just a general investigation and will not have any malice against you. When did you move in? Tell me the specific time."

Seeing Ning Zhiheng being polite, the nervousness of these residents finally relaxed. These days, the most feared people wearing uniforms would be a huge trouble for these civilians.

As a result of the inquiry, three of these four households are old residents, and only one family moved in in August last year.

It should be this house! Ning Zhiheng thought in his heart. The carrier pigeon escaped that search and knew that the ringing ring Lane was already very unsafe. He would definitely arrange to escape and evacuate near Heilang Street, and now it appears in the Paint Shop again.

He kept moving his hiding place, which brought certain difficulties to the investigation of the case, but in Ning Zhiheng's eyes, he could not hide his whereabouts and revealed clues.

He then asked, "Do you know who the resident of this house was before? Bring me his landlord and neighbors."

After a while, a thin old man was brought to him. He said tremblingly: "The tenant before this house, named Huang and named Huang Zhongxin, was in his thirties. He rented a house with me for two years. He moved out at the end of July last year and moved into the new resident in August."

"Do you know where Huang Zhongxin moved?" Ning Zhiheng asked. He also knew that there was little hope, but he still confirmed it.

As expected, the old landlord shook his head and replied, "I don't know this. He is not familiar with me. Apart from saying a few words when paying the rent, he usually nods when meeting and doesn't say anything more to me."

I asked several neighbors again, and the answers were almost the same. I didn’t have a deep relationship with each other, so I didn’t know much about Huang Zhongxin. I just knew that he seemed to be an employee of a company with a good salary and rented the largest house on the second floor.

Just a month after that late-night search, Huang Zhongxin moved out, and no one has seen him again.

Ning Zhiheng gathered all the neighbors who had seen Huang Zhongxin together according to the old method, took out paper and pen, and began to outline the portrait of Huang Zhongxin based on their description.

The more people described it, the more accurate the portrait will be. It took nearly two hours to finally complete Huang Zhongxin's portrait.

After two hours of brief contact, the neighbors around had eliminated their vigilance. Looking at the portrait, they nodded and agreed that they were almost no different from real people.

It seems that this time the portrait was very successful. Based on it, Ning Zhiheng can initially grasp the most direct clues and greatly save many unnecessary links. It is only a matter of time to find Huang Zhongxin.

Ning Zhiheng withdrew the team and returned to his office, immediately picked up the phone and called the Telecommunications Department.

When the Telecom Department received a call from Ning Zhiheng, someone rushed over immediately.

The knock on the door sounded, Ning Zhiheng came in, and the person who pushed the door was Bian Deshou, the major leader of the Telecommunications Department.

After not seeing each other for a few months, Bian Deshou's face became much rosy. Now the status of the Telecommunications Department in the Military Intelligence Investigation Department has been greatly improved. Many advanced instruments have been purchased, and the personnel and equipment have doubled. The seat said bluntly that the investment of the Telecommunications Department will increase significantly in the future.

Bian Deshou's life is getting better and better now. Of course, when he heard Ning Zhiheng's call, he rushed over immediately.

"Team Leader Bian, I'm so embarrassed. I'd like to ask you to come." Ning Zhiheng stood up to greet him, invited Bian Deshou to the sofa and sat down, and then placed the monitoring record in front of him.

"If there is one, Team Leader Ning's order is to come over no matter how busy he is. What? Is it a matter of monitoring and recording?" Bian Deshou said with a smile.

Ning Zhiheng nodded and said, "I have some questions. You know, I don't know much about this. Please ask Team Leader Bian to solve the problem!"

Bian Deshou agreed repeatedly: "I will definitely speak without saying anything!"

Ning Zhiheng pointed to the monitoring record and said, "There is a radio wave signal we have contacted before. The Intelligence Department almost caught someone, but failed and let him run away.

Now the monitoring record shows that it appeared again seven days ago near the paint shop, and I wonder if we can find a more specific location when he appears next?"

Bian Deshou brought the monitoring record over. The content on it was exactly what he was responsible for monitoring, and the situation was very clear.

Hearing Ning Zhiheng's words, he couldn't help but smile bitterly and said to Ning Zhiheng: "Team Leader Ning, it's really hard for us to do what you said."

He sat upright and explained to Ning Zhiheng carefully: "Although our technical capabilities have greatly improved, we still cannot specifically define the radio signal to the exact location. Moreover, there are too many radio stations in Nanjing City and the radio waves are complicated. Our equipment cannot quickly search and locate a certain signal. Unless we know the approximate location and time of the upcoming appearance, the distance cannot be too far, otherwise it will be difficult to determine.

In April last year, Team Leader Yu from the Intelligence Department did this. We spent a lot of effort to adjust the equipment and took another two months to gradually eliminate other radio wave interference, locked it, and figured out its transmission rules,"

Ning Zhiheng knew that his request was a bit too much when he heard it, and asked again: "This radio wave has appeared in Heilang Street before. Is there any monitoring record? Is it changing the frequency of its sending news? Is it still once every ten days?"
Chapter completed!