C257 Failure

"This is a tracking device. It can't be compared to the department's specialty. I assembled it when I was free, but if the distance is less than a kilometer, it shouldn't be a problem."

Zuo Liu stuck a black button-like item on the side of Gu Ziqi's suit jacket. "We won't be too far away. If you still haven't moved in an hour, we'll go over."

Gu Ziqi nodded and squeezed Zuo Liu's shoulder