C878 Find Some Trouble

"This is — —" Lin Xiao took the key that Zhou Cheng handed to him, and after looking at it for a long time, his eyes lit up. "The key to the mechanism box?"

Zhou Cheng nodded: "I have something in the mechanism box. If you encounter a life or death situation, you can go to the investigation office. After opening it, I will save your life."

Lin Xiao was surprised