Personally, I think it is more convenient to take a free bus from Marriott Hotel in the Sky to Tung Chung, transfer to Lijing Station on Tung Chung Line, and then transfer to Mong Kok Station on Tsuen Wan Line. This kind of journey is relatively easy to understand, so other bus routes are not recommended because it seems that you don't understand it very well.

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 for the airport express line, moving rail line and light rail, everything else 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 all-day pass is an accessory. If you think the subway will take a lot of time, buy a full-day pass.

If you have any questions, please continue to consult. I hope it helps you! ~