C245 Mechanical passage

"Damn, I was too careless." Wang Yu secretly cursed herself, and focused on listening.

But she didn't hear the sirens or the people coming.

"Is the alarm broken?" Wang Yu thought.

Actually, it wasn't that the alarm had broken, but that the mechanism had failed. Because when Wang Yu was digging at the bottom of the hole, she cut off those metal wires, and that was the bus