If you've looked around China a little more, you will realize how lean manufacturing can be.
The plastic casing if probably from a commodity supplier, who doesn't know or care what the buyer uses it for. The labels and manuel, likewise. The engineer, manufacturer, and distributer could be one hacker, a few mates flashing the drives, and a couple of drivers.
As for the retailers, building managers, and government, it's likely that you bought it in a tourist shopping area, probably near a long-distance railway station or a tourist attraction. Tourists (generally Chinese tourists from other cities) who shop in those places get ripped off, and nobody notices, because they never complain. They just fly home, and curse themselves for shopping in a tourist trap.
In China, you never shop in tourist traps. You don't eat anything unless its in a side street, where the locals (who prey on the tourists) eat. You don't even get a taxi parked in front of a 5 star hotel, or bus depot. Get a bus, walk out of the tourist zone, or flag a taxi that just happens to be passing by. (Note, the buses can be dangerous if they aren't local buses. Some special tourist buses disgorge the passengers into a small village, where taxi drivers insist on exorbitant fees to take you back to civilization).