spy ace

Chapter 3900 Method

Dong Huayi continued, "Then the mysterious signal source will also appear in the corresponding urban area at night. From a probability perspective, if the surveillance vehicle is active during the day, it is very likely that it will be active in the same area at night. Otherwise, the key monitoring range will be too repetitive. However, the signal from the other side is also judged in this way. How did they judge it?"

"Yeah." Fan Keqin nodded and said, "What you said does make sense. I am responsible for patrolling the entire city. This time I patrolled the south. At night, the area I focused on patrolling is most likely somewhere else, not in the south. But something happened in the south. So you suspect that there is a traitor on the other side who knows the movement of the surveillance car?"

"Yes, that's what I mean." Dong Huayi said. He took a puff of cigarette and then said, "That's why I think the signal source must have received some information. Otherwise, why would he make such a judgment every time? And who could have obtained this information? It's very likely that there is an insider who told the signal source, what do you think?"

Fan Keqin nodded gently and said, "Well, if you put it that way... it's not impossible. But... it's still not very rigorous."

"Yes, I know it's not very rigorous." Dong Huayi said: "Then let me tell you what you think. Don't worry about this or that. Just tell me directly."

"Ah, why should I be so cautious with you?" Fan Keqin replied, then paused for a moment, as if he had sorted out his thoughts, and then said: "First of all, what I said is not that there is no possibility, it is just one of the possibilities. But there are others. You see, you said there is a traitor, which is a possibility. But can we monitor the surveillance car? Okay, the same principle applies to tracking the surveillance car, it is also possible.

  In addition, is it possible that someone is in a secret corner, always watching the gate of our bureau? It is still possible. In addition, after going out, you will wander around the city. There are also some fixed observation points on the roads. If you see the surveillance car driving there, you can call and tell them. So I say that your speculation, or feeling, cannot be ruled out, but it is only one of them. There are many other possibilities, do you understand?

"You're right, I understand. It makes sense." Dong Huayi flicked off the ash from his cigarette, thought for a moment, and then said, "Well, do you think that no matter if it's a spy or not, the source of the signal must have received the movement of the surveillance vehicle, so he chose the direction of the transmission in response?"

Fan Keqin said, "It's hard to say. But one or two times can be explained by low-probability events. But if it happens one after another... then it's not quite appropriate to use low-probability events. I do tend to think that the source of the signal must have obtained some of the driving tracks of the surveillance car in some way."

"That's good." Dong Huayi said, "Hearing you say that, I have a better idea in my mind. But how can I prevent this thing? What do you think about me hanging an observation car behind the surveillance car? I can secretly follow the surveillance car for a distance, so that I can observe whether there is a tail behind the surveillance car or something like that."

"Sure." Fan Keqin said happily. But he knew that this method would not bring any trouble to him and Hua Zhang, because the two of them directly obtained the information through the Special Investigation Section and the Monitoring and Investigation Team, and there was no need for anyone to track them, so even if he did this, he would not be able to really find anything.

"You can do more than that." Dong Huayi said: "More options, more ways. Hey, can you give me some other ideas?"

Fan Keqin said, "I'm not trying to fool you. It's feasible for you to do this. There is a special observation vehicle at a distance behind the surveillance vehicle. This is in line with anti-tracking science. Once someone really takes the surveillance and tracking method to grasp the driving trajectory of the surveillance vehicle, he can't just take a look. He needs to follow it for a period of time before he can make a certain judgment. Therefore, the observation vehicle at the back has a chance to catch the tail."

At this point, Fan Keqin paused, as if he was thinking about it again, and said, "There is another way, that is to get another surveillance vehicle team. Or even three or four surveillance vehicles. In this way, they can be evenly distributed to patrol and cruise in the city. Even if the enemy knows the movements of the surveillance vehicles, they will be helpless."

"Where can I get a second one, let alone three or four." Dong Huayi said, "You know how I made that surveillance vehicle. It was from the warehouse left behind when the Japanese were driven away. I finally gathered good parts from all over the country and barely put together one. If I want to get a few, that's fine. There are surveillance vehicles all over the city. If there is a signal, the nearest one can rush to the location in an instant. No matter how many signal sources there are, they are not enough for me to catch."

Fan Keqin said, "Hey, it's precautions, do you understand? Confuse, fake target, understand? You can't get a second car, but what about the shell? Can you tell it from the outside? You can't. You just make a similar shell, or even make a few, and then drive around the city in the same way as the surveillance car. If there are surveillance points paying attention to the surveillance car, then will it confuse them? Will they know which car is the real one and which car is the fake one? Do they have X-ray vision?"

"Yeah, that's right." Dong Huayi nodded in agreement, but then said: "In that case, if several surveillance vehicles appear, will the other party still dare to send a message? And if there are really people following and monitoring us, will they continue after seeing this situation? They have already withdrawn, so there is no point in following them. Then I want to catch the person or people who are following and monitoring us, but that is unlikely to be accomplished."

  Fan Keqin said "Hmm." and then put out his cigarette in the ashtray. He said, "If you want to catch this possible follower...why don't you use this trick first? You can use the previous trick first, which is to arrange an observation car behind the surveillance car team. Use it for two days. If you see a suspicious person behind the surveillance car, it would be even better, just catch him directly..."