The people of this world seem to enjoy living underground.
When Su Ziyu followed Jian to the main base of the Rebel Army, he couldn't help but marvel that the natives of this world had really maxed out their digging skills.
The main base of the Rebel Army was called Iron Mountain, originally a rich iron mine. Once they dug down hundreds of meters, they established their headquarters there. The entire underground base was vast, almost like a small town, with around ten thousand people living there. It housed comprehensive facilities, including a planting area, residential zone, medical area, arsenal, and more.
The man named Bobbi led Su Ziyu to a separate bedroom and said, "You can rest here for now. I'll take you to the dining hall in an hour."
Su Ziyu nodded slightly, then pointed to the light green iron lump not far away and asked, "What is that?"
