Does using HK Octopus Card provide a discount on transportation fares?

Dear Chinee, the card not only brings a lot of convenience, but also provides discount on transportation fees. For instance, if you use the card to ride on Airport Express Line, you can transfer to MTR lines free of charge for once. Also taking bus and MTR with it can you get some discounts. In a word, it is a wise choice for you to use the card to explore the city.