The Octopus Card is a prepaid credit card that's valid all over Hong Kong. Get yourself one and enjoy the benefits. No more fumbling for coins to pay the MTR simply scan the card at the ticket counter and the cost will be deducted from your pre-paid credit reserve. The Octopus card is valid at the following; MTR Stations, Star Ferry, Peak Tram, 7 Eleven, McDonalds and others. Tourist should get the 'On-loan' Octopus Card. You can purchase cards at the MTR stations or the express counter at the airport.