八達通
The MTR usually charges less for journeys made using an Octopus card instead of conventional single-journey tickets. For example, the adult fare of a single journey from Chai Wan to Tung Chung is HK$25.7 with an Octopus card, and HK$28.5 with a single journey ticket. Other public transport operators also offer intermittent discounts for using Octopus cards on higher fares and round-trip transits on select routes.