While the drone design team was eating at the hot pot restaurant, Wu Entai contacted Lin Haizhen on the phone. After a few simple words, the two agreed to meet at Fuyunlai Teahouse at 1: 30 in the afternoon.
Then Wu Entai called the teahouse and ordered a half-pack.
Fuyunlai Teahouse was a place where Wu Entai often went to watch operas. The exterior and interior of the teahouse were all retro designs. On the first floor, there was a small stage and individual seats. On the second floor, there was an empty space in the middle. Corresponding to the stage on the first floor, there was a row of half-packs for watching operas.
Because Wu Entai went to this teahouse several times to watch operas, the task force had already arranged for plainclothes investigators to be here. After confirming the number of the half-pack, they immediately set up surveillance and listening devices in the room.
Around one o 'clock, Lin Haizhen and his secretary drove out of the company. About ten minutes later, Wu Entai also left his residence in Xu Jian's Ford.
Around 1: 30, the two people walked into the teahouse one after another. On Wu Entai's side, Xu Jian stayed in the individual seats on the first floor and went into the box alone. Lin Haizhen and his secretary went upstairs to meet Wu Entai.
After the two sides met, they greeted each other warmly. After ordering a pot of tea and a few snacks, they quietly listened to the "Twin Immortals Worshipping Moon Pavilion" that just started on the first floor.
Wu Entai was a real opera fan. As soon as the actor downstairs started singing, he was completely immersed in the performance.
Although Lin Haizhen didn't know if he really liked Cantonese opera, his legs shook rhythmically with the actor's singing. His head nodded along with the lyrics, and he seemed to be very immersed in the performance.
Lin Haizhen's secretary was obviously not in the right state. At the beginning, she pretended to listen for a while, but after a while, she couldn't sit still anymore.
She secretly glanced at Wu Entai, then began to "wander" around the teahouse, and a faint impatient expression appeared on her face.
After about half an hour, she couldn't hold it anymore. She secretly touched Lin Haizhen with her foot under the table, but Lin Haizhen looked at her sternly. She pursed her lips in grievance and turned her face to the side.
Although Wu Entai's eyes were fixed on the stage, he was also paying attention to the movements in the box. The small interaction between Lin Haizhen and her secretary was completely seen by him from the corner of his eyes.
After a slight smile appeared on his face, he raised his hand to signal the waiter outside the box.
The waiter was naturally a plainclothes detective from the Criminal Police Unit. When he saw Wu Entai waving at him, he hurriedly entered the room to inquire.
Wu Entai told the waiter that he had something to discuss with his friend and requested a fully booked private room. Although the waiter was surprised, he still professionally led the three of them to an empty room on the right side of the second floor.
At this point, the monitoring equipment set up by the task force in advance was completely useless.
Gao Sheng, who was in charge of the scene, immediately activated the emergency plan. He asked the investigator, who was disguised as a teahouse waiter, to stick a listening device under the panel of the tea table in the private room while helping to bring the teapot and snacks.
At the same time, the field investigator, who was disguised as a teahouse waiter, entered the private room next door and used the light guide to monitor the situation in the private room through the gap in the partition above.
As soon as the audio monitoring was restored, Wu Entai called the waiter again, saying that the room was too noisy and that he wanted to change to a private room further away from the stage.
The waiter had no choice but to follow the request and change the three of them to the room at the end of the corridor again.
Gao Sheng couldn't tell if Wu Entai was really doing this for the sake of the conversation or as a means of anti-reconnaissance. While he was hesitating whether he should ask the field investigator to place the listening device again, Wu Entai tipped the waiter 200 yuan after the tea and snacks were all served and told him not to disturb them without permission.
Gao Sheng was worried that the waiter would find a reason to enter the room and wait for the opportunity to place the listening device. This would arouse Wu Entai and Lin Haizhen's suspicion and might even be discovered, so he could only give up.
Moreover, he wanted the technical team to set up the light guide so that they would know that there were guests in the room next door.
After a brief hesitation, Gao Sheng ordered the two field investigators, who were disguised as teahouses, to reveal their identities to the guests in the private room next door and change rooms with them.
Soon, the two field investigators knocked on the door of the private room next door. After opening the door and entering, the two field investigators, who were disguised as a couple, noticed something strange at the same time.
According to the plan that they had prepared beforehand, the male field investigator looked at the three of them in a daze and asked, "Is this Uncle Zhao's room on the top floor?"
After getting a negative answer, the male field investigator looked at the private room number on the door again, picked up the phone, and dialed a number. After some questions, he 'realized' that he had remembered the wrong room. He quickly apologized and pulled his female companion out of the private room.
After returning to the original private room, the field investigator reported to Gao Sheng that there were three male guests in the private room next to Wu Entai and the others. They were all sitting next to the wall of the private room where Wu Entai was.
After they entered the room, they found that one of the men was hurriedly putting away something that looked like a medical stethoscope. Moreover, the three of them looked unusually vigilant.
"When did the three of them enter the private room?" Gao Sheng asked.
"Around one o 'clock. They said that they had something to discuss, so they asked for a full room. After they went in, they never came out again," the leader of the technical investigation team reported.
Under the sudden and complicated situation, Gao Sheng confirmed the structural diagram of the second floor of the teahouse as quickly as possible. After communicating with the field investigator, he confirmed that the second floor was very high. The vertical ridge structure above the corridor was very deep and well-hidden. Moreover, it was not sealed off from the private room. It was suitable for the technical reconnaissance drone to work.
After coming to a conclusion, Gao Sheng immediately asked someone to send the technical reconnaissance drone into the teahouse. It was sent all the way to the second floor and released under the cover of two field investigators.
After the drone operator controlled the drone to rise to the top of the corridor on the second floor, he found that although the gap between the private room and the corridor was not sealed off, the gap between the vertical ridge and the corridor pillars was almost the same as the width of the technical reconnaissance drone.
The operator experimented a few times, but he could not guarantee that he could successfully pass through. However, if the drone stayed in the air above the corridor for a long time, it would be very easy to be discovered by guests passing by.
In addition, because the frame was too high, through the perspective between the vertical ridge and the corridor pillars, it was impossible to completely monitor the situation in the private room. The sound pickup device in the corridor was seriously disturbed by the singing of the actors on the first floor, so the sound reception was not ideal.
"Contact Qu Sen and tell him to come here as soon as possible!" Gao Sheng immediately gave a new order.
"Captain, Team Leader Qu Sen's phone is off," the leader of the technical investigation team dialed Qu Sen's phone number and answered.
"F * ck, today is Wednesday." Gao Sheng reacted immediately and took out his phone to call his sister.
— —
Gao? When her driving skills were at full power, it could be said that it was very scary. When the Beetle stopped outside Gao Sheng's command vehicle, Qu Sen's back was soaked in sweat.
However, there was no time to care about that. After Qu Sen got out of the car, he directly got into Gao Sheng's command vehicle.
"Go in through this gap, find a suitable place to place the listening device, then withdraw." Gao Sheng used the most concise language to describe the situation and mission at the scene to Qu Sen.
After Qu Sen took over the position of the drone operator, his eyes used the image on the laptop screen to determine the distance, and he rubbed his hands hard.
Then his left hand firmly held the direction lever, his right hand removed the automatic balance correction of the gyroscope, and fine-tuned the power output of the drone blade.
The drone on the second floor of the teahouse above the corridor followed Qu Sen's operation. The right rotor power increased, and the flying posture changed. It was in a slanted state, low on the left and high on the right, and slowly moved forward.
Gao Sheng's eyes were glued to the control screen of the drone, afraid that the drone would hit the wooden frame next to it and make a noise.
"After this, do you think we should adjust the design of the technical surveillance model?" Qu Sen's left hand steadily pushed the control lever forward a little, and he whispered.
"How?" Gao Sheng felt that his throat was a little dry.
"Change the frame to a soft rubber design, so even if there is a slight impact, it won't make any noise." When Qu Sen spoke, the drone flying in a slanted state had successfully passed through the wooden frame.
"Why didn't you think of this earlier?" Gao Sheng's tone was a little more relaxed, but only a little. Because Wu Entai and the other two were below the drone. No matter which one of them looked up, they would directly see the "little thing" slowly flying above their heads.
"Nonsense, we didn't encounter this situation earlier." Qu Sen turned on the gyroscope as he spoke, and the drone instantly returned to its normal flying posture.
"Hurry up and find a suitable place, my heart is beating really fast." Gao Sheng muttered. Wu Entai and Lin Haizhen were talking below, but he couldn't pay attention to what they were talking about.
"Look at your mental fortitude, what kind of captain are you?" Qu Sen mocked. He controlled the drone to stick to the edge of the private room's inner wall, and slowly moved towards the window.
On the side of the corridor, Qu Sen needed to find a position where the sound was clearer due to the heavy influence of the Cantonese opera lyrics and accompaniment.
The structure of the restaurant's roof was not good for sound, and Wu Entai and the other two's voices were not loud. The drone circled around the private room, but it still couldn't find a suitable position to pick up the sound.
Qu Sen controlled the camera to scan the private room, and finally set his eyes on the two pots of "Dragon Whisker Iron" by the private room's window.
Gao Sheng saw Qu Sen adjust the image and guessed what he was thinking. He said, "F * ck, if you throw it on the floor, today's matter will be completely screwed."
"You don't dare?" Qu Sen mumbled. He was thinking about the safest way to release it.
"I'll take responsibility if I screw it up." Gao Sheng gritted his teeth and made up his mind.
"Okay, you're a man." As Qu Sen spoke, he controlled the drone on the roof to accelerate for a short while, and instantly pressed the release button.
The small listening device, which was slightly more than two centimeters long, moved in a very small parabola due to inertia, and quickly fell towards the bottom of the private room.
Gao Sheng didn't expect Qu Sen to act without any preparation. The moment the listening device fell, his fingernails almost dug into his palms. However, the image on the laptop screen was changing rapidly, and he couldn't see whether the listening device had fallen into the pot or not.
"Old Lin, we've been dealing with each other for a few years now. Let's be honest today." As Qu Sen changed the audio channel, Wu Entai's voice came out of the speaker after being corrected by the software.
While Wu Entai was talking, Lin Haizhen's lover saw the leaves of the green plants by the window suddenly move, as if they were touched by something.
She turned her head to take a look, and when she didn't find anything strange, she subconsciously looked up at the pot.
At this time, under the control of Qu Sen, the reconnaissance drone had already flown above the door of the private room. After it rose a little higher, it hid in the shadow of the wooden beam.
Gao Sheng pursed his lips. From the image, Lin Haizhen's lover scanned the room and didn't find anything. She quickly refocused her attention on the two men who were talking.
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