Gu Shangse sat down and felt for crystal cores in the bag Su Ling had placed on the console, handing them to her.
Su Ling took them and inserted them into the crystal core slots on the console. These were crystal cores that Su Ling had already sorted.
This entire bag of crystal cores were the most basic, that is, entirely transparent ones.
Once the transparent crystal cores were used up, they would move to white, then blue, red, purple, and black.
As the color of the crystal cores changed, their effectiveness increased.
For instance, right now, all the crystal core slots on the console needed to be filled to ensure the castle could operate.
After Su Ling filled all the crystal core slots on the console, she pressed a button on the console.
Immediately, Gu Shangse saw that the space they were in allowed them to see the outside clearly.
The surroundings became bright and everything was within their view. Su Ling said in a calm voice, "We can see everything outside, but from the outside, we appear completely dark, with no way to see inside."
Gu Shangse looked around, his gaze finally settling on the Rao Beichen siblings. "Them—"
Su Ling followed Gu Shangse's gaze. "No need to mind them."
"I know them," Gu Shangse withdrew his gaze and looked at Su Ling. "But not well."
Su Ling hummed and pressed a button on the console.
It was clear she was not interested in the Rao Beichen siblings, but since Gu Shangse had mentioned them, she responded, "They—"
On the console was a pillar that extended upwards, connecting the control room to everything above it.
As Su Ling pressed the button, countless panels appeared, presenting themselves to the two like special effects.
Su Ling looked at the snowflake-like lines on the panels and then looked down at Gu Shangse. "What are their names?"
"The man is Rao Beichen, and the woman is Rao Can. They are siblings," Gu Shangse replied to Su Ling, word by word.
Su Ling was stunned after hearing Gu Shangse's words.
She hadn't expected the owner of that mobile fortress to be Rao Beichen, a powerful figure from the post-apocalyptic era.
It made sense, after all, someone who could become a powerful figure after the apocalypse must be extraordinary.
With that thought, Su Ling looked outside, her gaze falling upon the mobile fortress of the Rao Beichen siblings.
Perhaps, it was time to meet this post-apocalyptic overlord.
When Su Ling and Gu Shangse left the control room and returned to the area above, the exposed stones had been filled with fresh soil. Fences had also appeared at some point, encircling the area in a semi-circle.
Extending upwards from the semi-circle was a massive transparent dome that enveloped and protected everything within it.
This was the protective membrane, which could prevent the extreme weather of the apocalypse from harming or affecting the mobile fortress.
The core that supported all of this was the crystal cores Su Ling had placed in the control room.
Su Ling was satisfied with the castle's transformation. She looked at the mobile fortress on the Rao Beichen siblings' side and said in a calm voice, "We don't have enough crystal cores yet. We need to keep accumulating them. Only with a sufficient number of crystal cores can the mobile fortress operate smoothly."
Gu Shangse turned his head to look at Su Ling. "I understand."
She needed crystal cores, and he would collect them, accompanying her in guarding this mobile fortress.
Su Ling tilted her head slightly. Her gaze was calm as she looked at Gu Shangse. The red mark on his brow seemed indelible, remaining there as if it were intentional rouge, making his skin appear even more dazzling under the light.
After looking at Gu Shangse for a few seconds, just as Su Ling was about to speak, she saw Sister Na and the others emerge from the house.
Judging by their expressions, they were very satisfied with their new residence.