Song Jian followed another corridor deeper into the complex, walking dozens of meters before turning a corner and suddenly seeing a large door ahead shimmering with a metallic luster.
The steel door was more than five meters tall and embedded in the rock walls around it, looking very thick and heavy. Song Jian estimated that to force it open, it would take the explosion of at least three or four of the supply crates they'd encountered earlier.
"How come not a single person has come out by now? It's too eerie!" Song Jian's brow furrowed as he had been prepared for a fierce battle, but now that he'd penetrated deep into the underground base, no one had come to stop him, as if everyone had already evacuated the place.