② Take the free bus from Marriott skyline to Hong Kong Airport, and then take A2 1 bus at the airport ground transportation center and get off at Central Station in Mong Kok, Hong Kong. It is also very convenient!
③ All-day pass is a subway all-day pass, that is, you can take the Hong Kong subway for free within 24 hours. Except airport express line, moving rail line and light rail, others can be brushed for free. Octopus is a necessity in Hong Kong. With it, you can take a minibus, bus or subway, just swipe it, similar to the bus card in the mainland. Octopus is a must, and the all-day pass is an attachment. If you think the subway will take a lot, buy an all-day pass.
If in doubt, please continue to consult. I hope it helps you! ~