hi,

We(with my husband and 20 yr old son) will be in hongkong on Oct. 28-30. I would like to know if we are going to use octopus card, do we have to buy 3 pcs or one octopus card will be enough for the 3 of us? Is there a booth in HKIA where we can buy the octopus card?where in HKIA?And also, where can we reload the octopus card?Or do you have any suggestions?Thank you so much