What is the cheapest way to go to hongkong ocean park coming from mexan harbour hotel?

You can take Bus 88F to Tsing Yi Station Ground Floor Transport Interchange and then take Tung Chung Line to Hong Kong. Then, transfer to Island Line at the station and do another transfer to South Island Line at Admiralty. Get off at Ocean Park. The fare is around 18HKD and the duration is about 1h.