C1224 The Big Knife with a Violent Temper

Black Grandpa said, "Now, no matter how you look at it, it's just our own guess. Maybe if we want to go to the third level, we don't need to pass through the first and second levels. There might be other passages around it or somewhere else. The old lady and the others have been preparing for so many years, so they won't be like headless flies that just randomly barge in