Although the Falcon used all his strength to turn the direction of the speedboat, they were still within the range of the large-caliber cannon. At this time, the rotating cannons in the hands of those powered armors had already begun to rotate. If they wanted to escape from the range of the cannon before being torn into pieces by dense rain of bullets, this speedboat that uses conventional power would definitely not be able to do it alone!

"Jump the boat! Diving into the water!" Qi Lin finished speaking, and then plunged into the artificial river, and the other three people also did it-

The next second, the speedboat was directly swept into a huge fireball by the cannon shell!

The body of water blocked the explosion's shock wave, flames and splashing fragments. Qi Lin and the other two dived to the bottom of the water in one breath, took out the breathing mask from their backpack, and pressed it on their face.

"Implement the No. 2 plan." Qi Lin made a gesture to the other three people, No. 3 nodded and immediately swam to the front.

Although this artificial river is huge, it is still a stagnant water. Compared with the natural water system with rich ecosystems, the self-purification ability of the artificial river can be ignored. If there is no artificial purification system, the river will soon become foul-stenched and will not be seen. Microorganisms reproduce in large quantities, and then become eutrophied. In the old era, many moats in ancient cities had similar problems.

However, the water quality of this artificial river is still very clear and clean, and it is even maintained at the standard of secondary drinking water or above. If there is no complete set of attached purification systems, no one who has a little knowledge of this will believe it.

Generally speaking, if you want to keep such a large artificial river clear, you must at least have a water purification factory of the corresponding scale.

What No. 3 needs to do is to find the channel connecting the river channel and the purification factory, and use this channel to enter the interior of the purification factory.

On the structural diagram of Shelter No. 444, this passage is not marked, but there is indeed a fully automatic sewage purification and treatment station near the core area of ​​the Rich District.

This sewage treatment station covers an area of ​​19 square kilometers. According to the standards of the old era, a sewage treatment plant that treats more than 10,000 tons of sewage per day generally does not exceed two hectares. The sewage treatment station with nearly 200 hectares can handle every day is definitely more than one million tons...

Even if the wealthy area of ​​Shelter No. 444 is luxurious, there is no industrial facility that produces a lot of sewage in the rich area. Not to mention one million tons of sewage a day, even the production of 100,000 tons of sewage may be a limit.

Then, this sewage treatment station is obviously somewhat "overcapacity".

Recalling that there are no other similar facilities in the wealthy area, Qi Lin and the others can almost confirm that while this sewage treatment station is responsible for treating the daily sewage of the wealthy area, it must also be responsible for purifying the artificial river.

Chairman Edas' residence is less than three kilometers away from this sewage treatment station. As for the control center of Shelter No. 444, it is even next to this sewage treatment station!

...

The four of them were swimming about 100 meters under the water. Finally, they found a circular passage opening with a diameter of more than two meters on the river bank on one side. A huge propeller was installed in the passage, and the rotating blades continuously introduced the river water into the passage.

"Explosion." Qi Lin made a gesture, and Falcon and No. 3 swam over immediately, took out two plastic explosives similar to plastic clay from their backpack, twisted them together, and threw them into the passage.

Accompanied by the water flow, two pieces of explosives were immediately sucked into the propeller. Then, a muffled sound came from it, and the propeller slowly stopped rotating.

"Let's go." Qi Lin took the lead in getting into the passage.

It is estimated that the designers of Shelter No. 444 would never have dreamed that an intruder would choose to enter the hinterland of the rich area from this passage, so there was no defense measure here, and even the valves used for manual maintenance were not locked.

After passing through this passage, the four of them finally entered the interior of the sewage treatment station. At this time, Colun seemed not to notice his movements, and there was no trace of a parasite near the sewage treatment station.

"What should we do now? Should we continue to go to the residence of the consortium chairman or take down the control center of the shelter first? If we can occupy the control center, the defense facilities in the entire shelter will be used by us." Falcon asked.

"If you want to control the center... you are probably taken over by the main brain now. Number 4, if you are allowed to enter the control center, do you have the confidence to take control from the main brain?" Qi Lin glanced at Number 4 and asked.

"I can't do it. If I had the ability, I wouldn't have appeared here." Number Four shook his head.

"And the density of internal defense facilities in the control center is far beyond our imagination, and we may not even be able to touch the door handle of the control room," No. 3 added.

"It seems that this method doesn't work. By the way, what is that? Is it a signal transceiver inside the shelter?" Qi Lin looked out through the factory and saw that next to the control center, this signal tower more than 30 meters high stood. The lights on the signal tower were still flashing rhythmically, proving that this thing is now in a working state.

"No, the various facilities inside the shelter are basically wired connections... The signal tower should be... No. 4, look at it, has the electromagnetic interference intensity in the area we are in now increased?" No. 3 seemed to think of something and suddenly said.

No. 4 immediately took out the communication equipment, glanced at it, and nodded: "Yes, the electromagnetic interference intensity here is more than hundreds of times that of slums, and radio equipment is almost impossible to work in this environment."

As he said that, No. 4 started the radio communication between the teams, and the noisy current sound in the headset made Qi Lin and the others frown.

"That tower... should be the source of interference!" No. 4 instantly understood what No. 3 said with excitement.

"In other words, knock out that thing and the communication between us and the headquarters can be restored, right?"

"Yes, without interference, the farthest transmission distance of this communicator is thirty kilometers. Before entering shelter 444, I would build a micro signal base station every ten kilometers. Through these base stations, the signal we send is only 16 seconds before we can reach the headquarters of the organization."
Chapter completed!