Zhang Yuanzhi drank some beer. Although his face turned red, the eyes behind the glasses were still very clear.

Qu Sen said that when Zhou Li and Li Ying were very busy at work, he seemed to want to ask a few more questions, but he stopped talking.

The two of them drank four beers and stumbled around for almost two hours. Zhang Yuanzhi suggested taking Qu Sen to another place to have fun.

Qu Sen laughed and said, "After going back, the 'leader' needs to check it out."

After Zhang Yuanzhi laughed for a while, he stopped talking.

Soon the two ended the wine party and got out of the Qing bar to get a car. Zhang Yuanzhi first sent Qu Sen back to the unit, and then left alone.

When he entered the garrison of the equipment innovation team, Qu Sen immediately found the team leader Tao who was waiting for him. After handing the memory card equipped with the recording to the other party, he also talked about some details that could not be reflected in the recordings that occurred during the meeting with Zhang Yuanzhi.

In detail, Zhang Yuanzhi wanted to ask about Zhou Li and Li Ying's work situation. However, he didn't know what he was thinking, so he stopped talking again.

Team Leader Tao was a little surprised by Qu Sen's sensitivity, and then smiled happily. After thinking about it, he revealed some of the situation to Qu Sendo.

For example, during the chat with Qu Sen and Zhang Yuanzhi, Zhang Yuanzhi's mobile phone kept talking throughout the entire process.

When a field agent who was dressed up as a guest on Guoan, he "passed by" by Zhang Yuanzhi with a small detection equipment, he confirmed that there was an invisible earphone in his left ear.

"In other words, when Zhang Yuanzhi was chatting with me, someone was monitoring the whole process, and even guiding him to talk to me about the topic?" Qu Sen asked in surprise.

Team Leader Tao nodded.

"Is there a way to know what was said on the other end of the phone?" Qu Sen asked again.

"Zhang Yuanzhi's mobile phone should have a hardware encryption chip installed, and it is still impossible to monitor with existing technology. Next time you talk, we will communicate with the mobile communications company in advance and think of ways from the transfer base station."

Qu Sen smashed his mouth and knew that if the other party uses hardware encryption, it would not be very useful to start from the base station.

He has a certain understanding of hardware communication encryption technology from Zhou Li's graduate courses. He knows that the data exchange between the two parties on the call must be encrypted and decoded by the encryption chip during the transmission and reception process.

Even if Guoan intercepts data flow, it has no practical significance. Compared with software encryption, it is completely a matter of luck to crack hardware encryption to crack astronomical and digital computing.

It may be able to break it in three to five days, or it may not be able to handle it in three to five months. The most annoying thing is that once the other party’s encryption chip adopts intelligent random encryption encoding, it means that the encryption method during each call is completely different.

Cracking one of them is useless. You can only start with the basic encryption logic after collecting enough samples. But in actual operation, it is not as simple as talking about the principle.

"It's okay, don't be discouraged. As long as we are patient, even the cunning fox will reveal its tail." Team leader Tao saw Qu Sen's depression and comforted him in a relaxed tone.

"Then I will continue to follow the agreed script?" Qu Sen pulled his thoughts back from the technical level and confirmed.

"Well, keep your current contact mode. You can be more vigilant in your daily life, drink some wine and follow the information we have planned, and see the opportunity to go out.

Don’t be nervous, you are very talented and seize the opportunity yourself. Remember, no matter when it comes, responding to the situation is the most important thing." Team Leader Tao encouraged.

"yes!"

At the request of Guoan, the military drone testing team extended the secondment of Zhou Li and Li Ying by another week.

The two girls stayed in the equipment innovation team mainly to drag the eyes of the people behind Zhang Yuanzhi to the public security side. The other party in the province noticed the ongoing test work on the communication team.

On weekdays, the two of them will definitely not be idle, and they mainly help the command vehicle design team to perform assembly tests. The progress was a bit slow at the beginning. As the hardware design unit of the mobile communication relay station sent the improvement suggestions, everything became smooth.

When the work was basically over and the police decoration bureau was entrusted to manufacture it, Qu Sen and the other two went out to gather at Zhang Yuanzhi's request. This time it was mainly for a trip, and when there was a real seafood meal.

Zhang Yuanzhi performed very well throughout the whole process. Except for a few more words of persuasion, he asked the three of them to do something to do when they were not busy, he said nothing vigilant.

The cost of this four-person gathering was not a small amount. But neither Qu Sen, Zhou Li, or Li Ying said anything bad, and she felt at ease.

Two days after the dinner, the phased test of the military drone project team came to an end. After the brigade left, Zhou Li and Li Ying continued to stay in the equipment innovation team for another two days before boarding the train and leaving.

Standing on the platform, watching Zhou Li grimacing at herself through the slowly moving forward window. Qu Sen felt that his heart suddenly became empty. He couldn't help but take out the phone and dialed Zhou Li's cell phone.

"What are you doing?" Zhou Li thought Qu Sen had something else to do, so she asked strangely.

"It's okay, I just miss you." The wind was very strong on the platform, and Qu Sen's voice was also a little loud.

"I'm sick!" Zhou Li spitted out two words and pressed the hang-up button, but the smile on her face could not be hidden.

"I'll forget it!" Li Ying lies in the opposite bunk and mutters, then turns around and continues to play with her cell phone in front of the car wall.

The three of them didn't know that at this time, a mobile phone in the city had just received an email.

The content is: Zhou and Li, who are highly vigilant and have the opportunity to come into contact with core secrets, can slowly draw on it.

Qu has a great future and has great significance in the future. Choose the right opportunity and can gradually test it.

———

Zhou Li and Li Ying left. Zhang Yuanzhi would still have a drink with Qu Sen if he had something to do.

Qu Sen told him that the team he is in charge is cooperating with a major case by the Huacheng police and may be very busy in the future.

Zhang Yuanzhi asked what case was.

Qu Sen's vague answer was a murder case in the Criminal Police Team's serious crime team, so Zhang did not ask any more questions.

Qu Sen did this by following the instructions of Guoan to "hang up" and on the other hand, he was really busy because there was progress on Gao Sheng's side.

Although the joint task force suspected Wu Entai and communicated with the outside world through satellite phones, with the in place of technical investigation methods and the use of satellite signal collection equipment, I watched it for a week and found nothing.

The task force quickly adjusted its thinking and focused its surveillance on Lin Haizhen, a Malaysian Chinese. On the third day after using all the technical methods, he finally caught him using a satellite phone to communicate with the outside world in the rest room in the office.

The call language is an unknown language, and it is included by a hidden sound pickup device in the rest room and is handed over to the language expert to identify.

The conclusion is that Lin Haizhen uses Tamil, one of the official languages ​​in Malaysia.

The task force immediately found the translator for translation, and the translation was: "Atai was very careful in his actions and probably would have to stay in China for a while.

He asked Bin to prepare some samples and specifically explained that the purity should be good and it would be used at any time. He should have contacted the appropriate distributor."

"Come me all the call records of Wu Entai and Lin Haizhen these days." After reading the translation, Gao Sheng immediately explained to his subordinates.

The call record was quickly sent. Gao Sheng looked at the three simple calls between the two in the past week, threw the record book in front of Jia Chengliang, knocked on the table and said, "Why did Lin Haizhen know Wu Entai's movements, but we don't know. Wu Entai must have some hidden external contact information!"

"Nonsense!" Jia Chengliang pulled the call record aside and said in anger.

"What, I'm seeing the ghost, what's going on with these two grandchildren?" Gao Sheng walked around the office in annoyance.

After thinking for a long time, I shouted to several subordinates in the room: "Come a meeting! I will think about it carefully. Is there still a blind spot in our surveillance?"

In order to find out how Wu Entai contacted the outside world, the task force specially divided several people, cooperated with the daily behavior records of the two suspects, and almost broke all the details, searching for the missing places bit by bit according to the time period.

Judging from Lin Haizhen's external contact call, it can be basically confirmed that Wu Entai's entry must be to introduce his Azrael into the domestic market, and he has already communicated with the distributor in secret.

Moreover, from Lin Haizhen's language method, it can be clearly analyzed that these two people are not one-on-one. Lin Haizhen is likely to be monitoring Wu Entai for one party.

Regarding this situation, Huacheng Bureau once again dispatched additional personnel to the task force, and all mobile forces from all aspects were on standby for 24 hours.

Gao Sheng and Jia Chengliang were all responsible for staring at one target, and they were almost in the surveillance car.

Since the Huacheng Bureau requires that all possible auxiliary means must be kept on standby at any time, the drone team will naturally be included.

During the day, the second batch of students sent by the Huacheng Bureau were on duty in groups. At night, a few people from the drone design team and the first batch of six students were on duty in groups.

There are five people in the drone design team, but Sister Liu really has no talent for controlling drones. So Sun Miao was still recovering from injuries, and there were only four people, plus six students, and they were divided into five groups in total.

Because we have to be responsible for the duty on both sides of Wu Entai and Lin Haizhen, we almost have to take shifts every other day.

After taking turns to Lin Haizhen twice, Qu Sen's third liner was on Gao Sheng's side. At nearly seven o'clock in the evening, Qu Sen packed a few meals at the roadside store and drove to the community where Wu Entai rented.

The security of the community is very strict, but Qusen has a door card for the community and directly swipes the card from the unattended side door to enter the yard.

After a round trip in the west area, Liu Zhiquan was placed next to the field car responsible for squatting in the west halfway, and then drove to the east area alone.

After parking the car in the next parking space of the surveillance car, I took the remaining packaging box and opened the door directly into it.

The surveillance car is a Buick business, and the rear seats have been removed. Most of the free space is occupied by surveillance equipment, and the remaining space is enough for two people to stay.

After Qu Sen arrived, the drone on duty on the day shift got out of the car with a large garbage bag.

After Qu Sen and Gao Sheng who was eating were left in the car, Qu Sen frowned and said, "I said, brother, can't you really take the time to take a shower?"

"Master, what are you talking about?" Gao Sheng snatched rice and dishes in big mouths and said in a vague way.
Chapter completed!