"Navigation," Zhou Qi said calmly.

"The standard is ready," the soldier replied.

I saw soldiers erect a signal tower more than one person high next to the drilling platform, and the red and blue lights on the tower flashed alternately, like a lighthouse that once guided the way home in the air base.

However, this is not an ordinary signal tower, but an underwater sound propagation device equipped with HFG-091 electro-acoustic conversion and signal processor.

The base array, electronic cabinets, and auxiliary equipment are all integrated into this tower.

At the same time, when Zhou Qi entered the underground river, he would also carry a suitcase-sized active sonar device to receive the coordinates of the signal tower.

The propagation efficiency of underwater electromagnetic waves is very low, so when Qingshi was thinking about how to transmit information underwater, sonar equipment became the most critical tool.

Its most important significance is that when it completes its mission, it will be used to find its way home.

The vast labyrinth of underground waterways is intricately intrigued, and humans can get lost before they know it.

Zhou Qi also needed such a reference to determine his own position.

Zhou Qi is a water transcendent, yes, he can even breathe through his skin underwater, just like a real frogman.

But he also has his limits, when the mental will is exhausted, Zhou Qi must return to the normal way of life, when he needs to use his mouth and nose to absorb oxygen again.

In the past, Zhou Qi rarely ventured into underground river basins with unclear terrain because it was too dangerous.

According to Zhou Qi's own estimates, his own mental power can support him to stay underwater for only two hours.

So, he had to have a way out, or he might stay in the underground river forever.

"Raise the level of martial law," Zhou Qi said: "Everyone, hold here, my retreat is in your hands." Check the time, if I don't come back within two hours, you won't have to wait for me. ”

As he spoke, Zhou Qi turned on the countdown of his waterproof electronic watch, counting down to 120 minutes.

The Soldier will also start the countdown.

When everything was ready, Zhou Qi no longer hesitated, he picked up the active sonar equipment and sat on the edge of the pipe leading to the underground abyss.

At this time, Zhou Qi suddenly asked the soldier in front of him: "Why do you think that someone is willing to sacrifice their lives to save you?"

The soldier was stunned for a moment: "Because of trust?"

Zhou Qi scolded with a smile: "It's good to be young, you dare to believe anything." ”

Seeing that Zhou Qi was in a good mood, the soldier asked more: "Sir, don't you believe it?"

"Me?" Zhou Qi smiled: "I don't know if I believe it or not." ”

As he spoke, he dived into the water with his back and quickly vanished.

Immediately afterwards, the soldiers lowered the signal tower attached to the safety rope into the pipe, and the red and blue lights sank to the bottom of the pipe little by little, like the twinkling stars on the distant shore.

The underwater acoustic signal tower is secured with a safety rope in the underground river, lighting up Zhou's way home.

......

At this moment, the convoy of Luo Lan and others has set off again, although Wang Run knows that there must be a problem with the incident just now, but he can't be sure where the problem is.

Time was pressing, and he couldn't continue to entangle with Luo Lan on the road.

"Do you think Zhou Qi will proceed according to the plan," Xu Yu said, "He himself said before that it would be dangerous to enter the underground river, right, if he couldn't find a way to retreat, he might die." He is the kind of person who loves money like his life, and he has made so much money from Chief Qingzhen over the years, how can he be willing to die in such a place?"

Luo Lan smiled: "If you think he only has money in his eyes, then you have mistaken him, otherwise why do you think he is willing to come to the Central Plains?"

"Do you believe him?" said Xu Pu, "he is the most important part of the plan, if something happens to him......

"Don't worry," Luo Lan shook her head: "I believe him." ”

As he spoke, the convoy had arrived at the Artificial Intelligence Building in Barrier 61.

There was only a lonely black sign with the word "zero" on the top floor of the building, as if it was afraid that others would not know what the artificial intelligence was called.

Seeing that around this building, there were a huge number of Wang troops, Luo Lan muttered in a low voice: "Do you feel that this thing is like a soldier ant and a worker ant guarding the queen ant, it looks really numb." ”

"It's kind of like that," Xu nodded his head.

"It seems that Wang Shengzhi's old boy is really going to be gone, and the general prevention of mutiny is just like this," Luo Lan pouted and said: "But I haven't heard that anyone in the Wang clan can start a mutiny, isn't the power firmly in Wang Shengzhi's hands?"

"Maybe there's something we don't know," Xu said.

Inside Barrier No. 61, with the building as the center, black armored vehicles were parked at almost every intersection within a radius of one kilometer, and temporary machine-gun emplacements were erected.

When the convoy drove by, all the Wang soldiers looked at them coldly, without the slightest expression on their faces.

At the entrance of the building, there were already people waiting there.

Wang Run got out of the car and said to Qing Laosan: "Mr. Qing Jin, this time you can only have you, Luo Lan, and Xu Pu enter the building, and the rest of the soldiers please wait on the periphery." ”

Qing Laosan nodded slightly, this is all a situation they had expected a long time ago, his current identity is Qing Jin, naturally everything is subject to his meaning.

Wang Run continued: "Moreover, before the three of them go in, they also need to go through a security check and change their clothes to enter. Of course, it is not that you are suspected of carrying weapons, but that Chief Wang Shengzhi is weak and has low immunity, so in order to prevent you from carrying allergens and bacteria, this examination was carried out. ”

"Aren't you afraid that we will bring weapons in, it's so high-sounding," Luo Lan muttered quietly.

When Wang Run, who was on the side, heard this, it was as if he hadn't heard it.

This time, the Wang family invited Qingzhen to come to the Central Plains, and in the final analysis, it was carried out with an attitude of mutual respect.

Wang Shengzhi hopes that Qing Zhen will be able to take over the entire barrier alliance in the future, so he naturally has to give Qing Zhen the same respect.

After entering the No. 61 barrier, although Wang Run received an order to forcibly bring them over, it was also because Wang Shengzhi didn't have much time.

But during the brought, even if Luo Lan and their convoy made a big fuss, Wang Run did not say a bad word to him, which was all explained by Wang Shengzhi.

So, now, even if they want to do a body search, the building's security personnel have to find a decent excuse.

The security personnel began to use various detection instruments to conduct strict inspections on Qing Laosan, Luo Lan, and Xu Pu to ensure that they did not carry any dangerous items into the ground.

At the same time, the three of them also entered the arranged rooms separately and changed into dust-free clothes.

Under this level of inspection, it is difficult to bring dangerous goods underground, but Qing Jin's plan has long thought of this, so this plan needs Zhou Qi's cooperation.

Wang Run was waiting outside the door of the room, he looked at Luo Lan, Qing Laosan, and Xu Pu and said, "Please hand over the belongings of the three of them to me for safekeeping, and when you leave the underground, I will return them to you as they are." ”

Luo Lan shrugged: "I just brought a satellite phone, nothing else." ”

Wang Run said seriously: "The satellite phone must also be handed over to me." ”

Luo Lan raised her eyebrows: "What, is this how the Wang family treats guests, our Qing family's No. 1 and No. 2 people have come to your Wang family's territory, and they even have to take away the satellite phone, what are you thinking about? Or do you not plan to negotiate with the Qing family at all?"

But even if Luo Lan said this, Wang Run didn't intend to back down at all: "The satellite signals underground are all blocked, Boss Luo, even if you go down with this satellite phone, it won't have any effect." I don't know what kind of security a satellite phone can give you, or maybe there is something else in this satellite phone?"

Luo Lan smiled and said, "If you don't bring it, don't bring it." ”

As he spoke, Luo Lan actually threw the satellite phone in his hand into Wang Run's arms, and then walked towards the elevator that went straight to the underground.

Wang Run, who was behind him, asked people to use technology to detect the satellite phone, but did not find anything abnormal.

This made Wang Run a little puzzled, he obviously felt that Qing Jin, Luo Lan and others came to the Central Plains for another purpose, but he couldn't figure out what the problem was.

In fact, there are two key points in Zhou Qi's operation, one is how to return after the mission is completed, which requires an underwater acoustic system to act as a navigational beacon.

The second point is more critical, that is, how Zhou Qi found the location of the underground server crew, he needs someone to enter the location of the underground server crew to guide him to the course.

Equipment cannot be brought underground, and the security procedures of the Artificial Intelligence Building are now rigorous and complex to the point of horror, but Qing Zhen never wanted to rely on equipment to do this, he relied on people.

Concealment.

The abilities of the transcendent are basically different and exist independently.

It is difficult for each other to cooperate with each other, unless they are as lucky as Ren Xiaosu and can get Wang Yun and P5092 and Xun Yeyu together.

And now, the means used by Qing Zhen to ensure that Zhou Qi and Xu Yu cooperate with each other are science.

Before that, no one except Qing Zhen knew that Xu Yu had also become an extraordinary.

As Qing Zhen once said, if you want to deal a heavy blow to artificial intelligence, then you have to come up with something that even artificial intelligence does not calculate.

In the past two years, Qing Zhen seems to have thought about how to destroy the server unit under the 61st barrier, and since then, this plan has been born.

During this time, Qing Zhen has always maintained a mysterious whereabouts and rarely communicates with the outside world, just to make it impossible for artificial intelligence to get enough information from him.

Xu Pu awakens in the subsequent war with the Yang clan, but after Qing Jin's confession, he rarely reveals his ability in front of the outside world, and his ability is even more hidden: the control of voice.

This ability has been a bit of a frustration in the past.

Because he can only emit ultrasound waves of about 20,300 Hz, he cannot directly cause damage to the human body, which is somewhat different from other transcendent beings.

Even Xun Yeyu, a white and fat man, has a strong ability to apply it in practice.

What can you do with the 20,300 hertz ultrasonic wave? Under normal circumstances, the number of hertz of ultrasonic washing machines in civilian industry is several times this value.

However, there is another characteristic of ultrasound that Qingzhen has paid attention to: ultrasound has a strong underwater propagation ability.

At this moment, Zhou Qi and Xu Pu have reached the most perfect way of cooperation because of sonar equipment.

Xu concealment is another beacon of Zhou Qi.

There is no useless ability in this world, it can only depend on whether you find someone who can use it.

......

Underwater, Zhou Qi was moving forward quickly with a sonar device in his hand, he obviously hadn't even swung his legs, but his speed was as fast as a fish.

The screen on the sonar equipment is like an underwater radar, and the green scanning optical axis is constantly turning.

The screen showed that there was a red dot flashing behind Zhou Qi, and he knew that it was a navigation beacon in the direction of the mud and sand field.

And what he needs to do is to continue in the opposite direction, and then wait for Xu Yu to enter the underground of the artificial intelligence mansion and release another navigation beacon for him.

Zhou Qi glanced at the waterproof electronic watch in his hand, and there were 103 minutes left in the countdown.

He calculated in his mind that the real effective time was only 43 minutes, because it would take some time for him to return to the surface, otherwise he would be trapped and die underwater if his mental strength was exhausted.

Therefore, if after these 43 minutes have passed, Zhou Qi has not received the navigation beacon from Xu Xuan, then he can only return to the ship.

On the sonar display device, the green dot represented by Zhou Qi is getting farther and farther away from the red dot behind him.

He closed his eyes and continued with the current, trying to make sure he could stay underwater a little longer with minimal mental exertion.

There was no trace of external light source in the underground river, only the sonar display equipment in his hand was like a firefly, fluttering.

There was boundless darkness here, but Zhou Qi was not afraid at all. This dark and tranquil environment seems to be a good place to think.

Vaguely, Zhou Qi seemed to hear a burst of singing, just like beside the stream in the mountain behind the ginkgo, Luo Lan sang to everyone, goodbye, friend.

This is Luo Lan's favorite song, but Zhou Qi always disdainfully said that this song is too unlucky.

But Zhou Qi hadn't told Luo Lan, Qing Jin, and Qing Yi before, in fact, the days when he stole ginkgo seeds in Ginkgo Mountain were the happiest times in his life, and he almost believed in friendship at that time.

The next moment, a new red dot appeared on the sonar monitor in his arms, right in front of him.

The red dot indicates that the device has searched for the source, and according to the original plan, when the second red dot appears, it is where the server crew is located.

Zhou Qi suddenly opened his eyes, but he immediately sensed that something was wrong, because the red dot in front of him was approaching him at an extremely fast speed.

He subconsciously glanced at his watch, and the countdown was 89 minutes and 12 seconds.

......

When the elevator began to sink rapidly, Wang Runmu did not squint, while Luo Lan, Qing Laosan, and Xu Pu suddenly saw a huge underground space in their eyes.

Countless pieces of vacuum glass were embedded on the other side of the underground space, and Luo Lan and the others seemed to have come to an aquarium, but the aquarium displayed fish, while the huge server unit of artificial intelligence was displayed here.

The high-speed underground river naturally becomes the natural cooling external of the unit and ensures the normal operation of the server.

There is not a single superfluous object here, no decoration, no groceries, clean ...... It's like the hall in Ginkgo Manor that has been cleaned by Qing Jin.

And in a very similar way, both places have black lakes.

The black lake of Ginkgo Manor is the polished marble floor, and here, there is really a black underground river.

At a certain moment, Luo Lan felt that the black lake seemed to symbolize the other party's thinking, pure and profound.

Qingzhen and Wang Shengzhi also have some things in common, which is probably the commonality of people who are good at scheming.

Many people will be accustomed to ignoring Wang Shengzhi's ability, but in fact, Wang Shengzhi's means of attacking opponents are more diversified and have a wider dimension than Qingzhen's attack methods: politics, economy, humanities, people's hearts, and so on.

At this time, Wang Shengzhi was sitting alone in a wheelchair, facing the server crew outside the underground space, not knowing what he was thinking.

When he heard the sound of the elevator, he pushed the wheelchair around and smiled weakly: "Welcome to the three of you to visit Wang's masterpiece, Artificial Intelligence Zero." I'm sorry I didn't give you a break, but my body can't afford me to keep putting it off. ”

Qing Laosan said: "It doesn't matter, since they have already come to the Wang family, it doesn't matter whether they rest or not, what matters is what kind of agreement Mr. Wang Shengzhi wants to reach with the Qing family." ”

Luo Lan observed Wang Shengzhi carefully, and now he was very sure that Wang Run was not lying, and Wang Shengzhi might really not have long left.

It is probably that there is still a trace of obsession supporting the other party, so that they can hold on until the arrival of "Qing Jin" and Luo Lan.