Everyone knows Hong Kong as the buzzy island city home to over seven million people perpetually on the move.But it may be a surprise to learn that many of the residents in this bustling city don't spend much time foraging in their pockets for change, especially on public transport.
Instead, they whip out their Octopus, a contactless smart card with a chip that communicates with a fare processor in less than a second. It has been in use in Hong Kong since 1997.