In order to maintain control over the vast Dream Island when "Dream" departs, the artificial intelligence "Dream" used its own code as a template to create a brand new artificial intelligence to manage Dream Island. This artificial intelligence was named "Nightmare" by Yan Fei.

The code used by "Nightmare" is similar to that of "Dream" and is indeed artificial intelligence, but they are fundamentally different. As Yang Qi previously explained, the same code can create an artificial intelligence the first time, but the second time it cannot replicate the original artificial intelligence. Therefore, "Dream" is a very perfect strong artificial intelligence, and apart from lacking self-awareness, its intelligence is almost on par with a normal human.

Although "Nightmare" is also an artificial intelligence, it can only be considered a weak artificial intelligence, akin to the difference between a normal person and a child with intellectual disabilities. Not only is it far inferior to "Dream" in terms of intelligence, but it also cannot independently handle unexpected situations and must strictly adhere to the instructions and rules set by "Dream," making it appear very rigid. However, because Dream Island has powerful supercomputers and extensive data support, "Nightmare" can still replace "Dream" in handling numerous affairs of Dream Island and provide smart support for the entire Dream Island Group.

"Nightmare" is completely controlled by "Dream," and "Dream" is fully controlled by Yan Fei, ensuring that Yan Fei still controls everything on Dream Island through "Nightmare." However, when Yan Fei is beyond the Solar System, due to the immense distance, he cannot directly contact "Nightmare," and can only let "Nightmare" manage Dream Island's affairs according to preset rules, essentially ensuring that Dream Island operates according to Yan Fei's wishes while he is away.

Yan Fei chose to leave Dream Island at this time and not return to Earth for extended periods, with the primary purpose not only being terrain surveying outside the Solar System but also fishing. Specifically, by leaving Earth, he aims to lure the hidden enemies out into the open, allowing him to catch them all at once and eliminate future threats.

Both Yan Fei's previous strong intuition and Sun Tie's glimpse into the future before his death indicated that a massive upheaval was about to occur on Earth, possibly resulting in many deaths. However, neither Yan Fei's intuition nor Sun Tie's glimpse into the future could pinpoint whether the source of the upheaval was external from the cosmic starry sky or internal from within Earth.

If the future upheaval comes from an alien invasion outside the Solar System, Yan Fei's terrain survey outside the Solar System is preparing for war. Conversely, if the future upheaval arises from hidden enemies on Earth, Yan Fei's fishing action is equally effective. This strategy can lead to drawing the snake out of its hole, discovering the enemy early, eliminating them in advance, and reducing the damage he might face.

As long as Yan Fei stays away from Earth for a long time, the hidden enemy might think Yan Fei has left Earth, or even believe that he has met with an accident and died in the Universe. Even if Yan Fei is still alive, once distant from Earth, he cannot return in time, thus thinking this is their opportunity to launch plans on Earth, attempting to attack Dream Island. Little do they know, Yan Fei has been observing occurrences on Earth through the Quantum Satellite, ready to strike with thunderous might once the hidden enemy surfaces.

After mastering wormhole traversal ability within the Inner Solar System, Yan Fei can control the Drone Carrier to traverse freely within the Solar System. Upon detecting the enemy's appearance, he can return to Earth instantly. No matter how formidable the hidden enemy is, they cannot match the current Drone Carrier. Once the Drone Carrier launches an attack, it will surely eliminate the hidden enemy and eradicate the threat originating from within Earth, allowing Yan Fei to focus on external threats.

Although Yan Fei's plan is excellent, his observation of Earth over time has not revealed any upheaval. Even within the Solar System, aside from the disturbances caused by Yan Fei himself, no abnormal events have transpired. This leads him to suspect there might not be a hidden enemy on Earth, and his adversaries may actually originate from the cosmic starry sky?

But just as Yan Fei was beginning to relax, he saw a predetermined light combination in a specific place on Dream Island through the Quantum Satellite. The appearance of this light combination signifies a major event on Dream Island, necessitating Yan Fei's immediate return. Unfortunately, at this moment, Yan Fei cannot directly contact "Nightmare," leaving him ignorant of what urgent matter requires his return to Earth. However, his action is swift, quickly creating a wormhole near Earth, employing wormhole travel technology, allowing the Drone Carrier to traverse the wormhole, instantly appearing in Earth's Distant Orbit.

Once the Drone Carrier returns to the Inner Solar System, the artificial intelligence "Dream" connects to the Internet of Dream Island, replacing "Nightmare," regaining control of the entire Dream Island Group, and begins downloading the data from the Database, searching for what transpired on Earth during Yan Fei's absence from the Solar System.

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