"Interplanetary travel?!" Li Wenxi was instantly shocked, "So powerful! Alien technology is really strong!"
"It's indeed very strong. If it weren't strong, how could it travel across star systems to reach us?" Xu Ying sat on the sofa, tilting her head back against the sofa's backrest. "Just thinking about opposing them gives me a headache..."
Then she shook her head vigorously to clear her mind, and explained to Li Wenxi again: "That's why stability and long-distance are the advantages of transmission devices, but their drawbacks are very obvious, so you don't need to worry too much."
"But that passage is different. That passage was left by my brother. It's a quick channel for humans in the underground world to quickly advance to the surface, with a very strong collective transmission capacity. If it's detected and reverse-utilized after being opened..."
Xu Ying's eyebrows furrowed slightly: "One careless move, this place could face a catastrophe."
