China has special cop revolvers with a special low-power round that only works in those revolvers intended to be used by police who need a firearm but aren't serious counter-terrorism cops. The low powered round reduces the chance of killing anyone. The unique pistols and ammo are instantly traceable if found in the wrong hands. And criminals with guns is almost unheard of so in the rare cases they are used it's almost always against someone who is considered dangerous but doesn't actually have a gun.