[No idea.]
Han Su's question was met with an unusually straightforward answer from Black Rose: [The truth is, we don't know what many of the unearthed Mechanical Fragments are for.]
[They say these machines are all related to the Radiation Era, a time when humanity suffered one disaster after another and nearly went extinct several times. Supposedly, a group of pioneers stepped forward and led humanity in fighting the disasters, eventually bringing us into the Reconstruction Era.]
[But so much time has passed that the information has been lost. We don't know which parts of the stories are true. Still, researchers believe that the organization must have possessed technology more advanced than ours.]
[For example, our Eastern District has unearthed many machines by excavating ruins. They're said to be so intricately made that even many of our society's cutting-edge technologies can't reproduce them.]
[But a lot of this technology is extremely dangerous, so only those who have been granted permission are allowed to study it.]
[...
She typed out a long message in one go, though her tone was faintly mocking: [Heh. But I think it's precisely because the Administrative Hall protects this technology so well that all kinds of wild speculation have sprung up in society.]
[Like people claiming these machines have Mysterious Power and all that. That's how the Great Tractor Cult came about in the Mysterious Circle.]
[...]
What the hell was the Great Tractor Cult?!
Han Su was speechless. He couldn't tell whether Black Rose was making fun of it or whether such a thing actually existed.
He had no intention of debating the truth of the mysterious with Black Rose. But as he stared at the Mechanical Fragment, he drifted into memories from long ago.
That confirmed it. Back then, he and the other children