Because he also felt that this matter seemed somewhat incomprehensible to him.
Now it's all densely packed residential areas, if it's hidden in denser places, he would understand that.
After all, the things they do are not for public scrutiny, so hiding deep in the secluded residential districts might be the most sensible place for them.
But if, say, he really chooses a more open area, then, for them, wouldn't they fear exposing their targets too easily?
"Because they need to use these high-powered transceivers, and there should be signal wave interference between residential areas, if he wants to make sure his equipment has no accidents, then, he must find a signal blind spot, which means the place with poorer mobility signal would be better for them."
"Places with poor mobile signals, I think I suddenly understand, according to the transmission frequency of this mobile signal tower, can't we guess everything now?"
"You're right, that's exactly what I mean."
