The entire prison was completely empty.
"Let’s go down and take a look."
Xu Xin imdiately followed the spiral staircase he’d taken last ti and headed downward.
Both Xu Ying and Li Wenxi were here for the first ti, unsure of what to do, and could only follow behind Xu Xin, continuing downward.
"Brother, in this underground prison, aside from us... there’s no other sign of life," Xu Ying remarked, observing the cells on either side of the staircase.
"Let’s go down and check it out."
The three quickly reached the lower level of the prison.
Along the way, all the cells were empty.
"My god... they’re even using gold-level teoric iron here..." Xu Ying marveled as she walked, "This entire underground prison is way too extravagant..."
"teoric iron, is it a very rare thing?" Li Wenxi reached out and grabbed one of the prison bars, feeling the texture of this special tal.
"Extrely rare!" Xu Ying nodded vigorously, "Particularly rare, how should I put it... The status of teoric iron in extraterrestrial technology is like that of titanium alloys and beryllium alloys in Earth technology."
"...Space technology?" Xu Xin turned back to look at Xu Ying.
"Yes. At least 60% of the total weight of the alien invaders’ spacecraft cos from teoric iron. Gold-level teoric iron."
Xu Ying nodded, and patted the tal walls of the underground prison: "This gold-level teoric iron is the highest quality teoric iron. It’s a special tal resource, not an alloy, but directly mined and slted, with high difficulty in both mining and slting. I really didn’t expect there to be an underground prison here entirely constructed out of teoric iron."
"Is it hard to slt? My furnace can do it," Li Wenxi gripped a tal bar of one cell and looked inside. Finding nothing, she turned back unenthusiastically: "Before coming with you, I’ve already slted several pieces of teoric iron, though currently I can only slt purple-level."
"Indeed it’s very difficult, at least for us humans, only your technology can slt teoric iron," Xu Ying feigned innocence, "And you spent nearly three hundred years before finally figuring out how to slt teoric iron in the last few years before that world collapsed. Ah, I’m talking about my sister-in-law."
"That sister-in-law..." Li Wenxi pursed her lips, "Sounds strange. It definitely was hard. So... after finally figuring out how to slt teoric iron, didn’t you produce more?"
"Of course we did. Most of the special weapons I plan to hand over to you in the future are made of teoric iron, but the amount... is limited, unable to equip many people."
Sighing, Xu Ying continued: "That’s exactly why we didn’t abandon mass-producible Earth weapons, and built an arms factory in the underground world, but unfortunately, sothing happened down there..."
Xu Xin glanced at her.
Previously, Xu Ying ntioned to him that the underground world might have been surreptitiously infiltrated by alien invaders.
After they ca up, they hadn’t asked what happened afterward.
Forget it, let’s figure out the situation here first, ask later.
But now, they’ve reached the bottom of the prison, and as Xu Ying said, it was completely empty, nothing at all.
Not even a trace, spotlessly clean, making Xu Xin question if the folks who left here did a thorough cleanup, taking even the trash with them.
This is too clean.
Such civility?
"Why not mass-produce teoric iron weapons?" Li Wenxi asked, puzzled, "From the rate I slt teoric iron, although slow, it should be possible to produce in large quantities if scaled up, right?"
She ant that though one furnace slts slowly, having hundreds or thousands working together could greatly increase the overall slting speed.
"It’s not that easy," Xu Ying said, troublingly rubbing her hair, "Our circumstances at the ti, building a large-scale factory wasn’t easy, and most importantly... teoric iron ore is too scarce. This tal doesn’t exist on Earth, only brought in by the alien invaders."
"After they settled on Earth, the tal was in short supply. To solve it once and for all, they sohow directed small asteroids rich in teoric iron to impact Earth multiple tis. Only then did we learn about this tal, naming it ’teoric iron’.
The na teoric iron, that’s how it ca about.
But...
Guiding asteroids to impact Earth?!
Xu Xin and Li Wenxi stared at Xu Ying, shocked.
Seeing their expressions, Xu Ying paused, then realized their thoughts and burst out laughing: "Hey hey, did you hear asteroid impact and think it must be very powerful?"
"Uh, isn’t it?" Li Wenxi blinked, "Asteroid impact on Earth!"
"Uh..." Xu Xin thought similarly.
Studies show Earth’s mass extinctions often resulted from asteroid impacts.
The dominant large dinosaurs on Earth for millions of years also went extinct due to this.
So hearing the term and that alien invaders can control asteroid impacts on Earth, it would’ve been strange if he wasn’t shocked.
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