The contact that came after a few days was not smooth. Fan Keqin was worried that it would be easy to get into trouble if he always used the previous line, so he spent a morning in the city again to carry out the "line drawing" activity and searched for a long time.

However, on two consecutive occasions, there were no longer telephone lines with long-distance services. It wasn't until noon, after lunch, that Fan Keqin found another line.

Maybe it was a bad morning, but when he finished the call, things finally took a turn for the better.

The first is that Qian Jinxun told him to keep his phone on at all times. Of course, this is said in code language. Booting up means that the spy transmitter is turned on on time. In addition, there is a radio frequency.

These two pieces of information were told to Fan Keqin, who immediately understood that this had a deeper meaning: the headquarters had discovered the movements of the little devil's fleet, and it was indeed according to Fan Keqin's analysis before, the other party began to cruise along the offshore sea.

In terms of time, Qian Jinxun and Sun Guoxin, who were in Chongqing, as well as the leader of the analysis team of the Investigation Department, comprehensively analyzed the situation and consulted a large number of intercepted telegrams, showing that the fleet of seaplane carriers suddenly turned around at that time because they received an order from the Devil's Admiralty.

This is because the national government's radio station is also trying to intercept the radio messages of the Japanese at all times. The principle of the radio thing is that the radio, as long as the frequency is right and within the range, the probability of interception is very large. The main thing is whether it can be deciphered.

This is also the reason why Fan Keqin seized the Japanese code book at that time, which directly aroused the extreme attention of Sun Guoxin and Boss Dai. In other words, both sides were able to intercept each other's telegrams in large quantities. But whoever can decipher the cipher code words more and faster will have an advantage.

And the intelligence department of the little devil was established in the whole of Asia, and even in the world, it was among the earliest. Therefore, at the time of the outbreak of the all-out war of resistance, this advantage accumulated over time was incomparably huge. Later, after Fan Keqin successively cracked the Japanese spy team and seized a large number of Japanese radio stations and code books, Chinese deciphering experts finally encrypted the Japanese telegrams and found some patterns.

The Pearl Harbor incident, China's intelligence department did quite well in deciphering it. Although the Yankees didn't pay attention, they did pay a heavy price afterwards, and the Pearl Harbor fleet was directly disabled by the little devils.

From this point, it can be proved that some time ago, although the speed and efficiency of telegram decipherment were still lagging behind the little devils as a whole, it was no longer the situation where they could only be beaten passively before. At the very least, you can fight back. That's a big step forward.

Now it is even more so, although it is not possible to completely decipher the information of the little devil, but some of it can indeed be intercepted and deciphered.

After a large number of information records were reviewed, the two units of the Security Service and the Intelligence Service finally discovered some mysteries in three days. Because from the intercepted frequencies, after a large number of calculations, it was found that in the South China Sea, the base camp of small Japan, and Taiwan, there were indeed several radio wave exchanges during that time, although the specific content was not deciphered, but after a large number of calculations by telecommunications experts, it can be concluded that the signal of one of the frequencies is indeed moving.

After the final discovery of the incident and the location estimation of the observation post, it is known that these telegraph signals that have been exchanged must be the fleet, the base camp, and Taiwan Island of the little devils.

So it's useless to say this information? If you really ask, all you can say is...... Interlaced like a mountain. First of all, this is a three-way communication, who started first, who started second, knowing this, you can deduce where exactly what is happening. In addition, the most important point is that the Security Service and the Intelligence Service have consulted a large number of intercepted telegram signals on the basis of this, and finally determined that the fleet's sudden U-turn was not due to the discovery of something by the little devils, but something else.

Thus, it can be determined that Fan Keqin's overall planning has not been exposed. This is very critical. Otherwise, the action made by the little devil fleet would not have been just the base camp, the fleet, and the communication of the three parties in the Taiwan Strait. There must be an initiator. But no matter how you look at it now, the initiator is the Taiwan Strait. and not elsewhere, so Fan Keqin's plan can still continue.

Fan Keqin returned to the observation room, explained the matter to Zhuang Xiaoman, and finally said: "But from today onwards, turning on the machine on time at seven o'clock every night will increase a certain danger for us. You have to be prepared. ”

Zhuang Xiaoman frowned and said, "Guangzhou shouldn't have the kind of detection equipment in the north. Then I change rooms every day and do the reception work, so that they are always moving, and even if the other party notices, it should be fine. ”

Fan Keqin waved his hand and said, "Don't be careless." If you do, and the investigator is me, you won't be able to escape. Even if I didn't notice you the first few times, it was only after you received a few telegrams that I found out. I would start by asking an expert to measure a certain range. In addition, your location is constantly moving, but the area is still in the city, so I can tell that you must have a lot of safe places to stay. ”

Speaking of which, Fan Keqin lit a cigarette and continued: "What does this mean? Even if an agent cooperates with a small team, will he really rotate the report at the home of each sleeper? It's impossible. So you must have a lot of empty houses, safe empty houses. When I come to this conclusion, I will send a large number of agents, or police, to thoroughly investigate the density of empty houses in the city. In the frequency from which you move, the range is finally locked to this area. ”

"After all, we have only identified multiple safe houses near Blue Street, and I believe that those who meet this condition will not have too many locations in the city. Eventually, I'll send someone to control a few suspicious locations, and then arrange one or more mobile forces to cut off the power the next time you receive the signal. It doesn't take me a few seconds to know which district you're in......"

Before Fan Keqin finished speaking, Zhuang Xiaoman was already cold in his back. Although what Fan Keqin said was not so specific. However, the step-by-step process is all very operable. So Zhuang Xiaoman said: "That...... So what to do? ”

At this time, Fan Keqin was happy and said: "I said before, if it is me who checks you, it is very dangerous for you to do this......