Hongkongers will for the first time be able to use contactless Octopus cards to pay for most public transport fares in mainland China by as early as next year, according to the company’s outgoing CEO.Octopus Holdings’ Sunny Cheung Yiu-tong said a new card, which would be compatible with the electronic payment standards in the city and the mainland, would be available for use on taxis, buses, subways and ferries across the border.He said the company was seeking to join a nationwide Ministry of…