Which bus is suitable from hk airport to Mongkok (Hotel Harbour, 968 Canton Rd.) ?

HKIA to Harbor Hotel: take shuttle bus no. A21 and get off at Sino Centre, Nathan Road. Then you can easily walk to your hotel. It costs 33HKD per person.

Mongkok (Hotel Harbor) to Wanchai by bus: walk from where you are to Shantung Street, Nathan Road to take bus no. 104 to Luk Kwok Centre, Gloucester Road in half an hour. Then walk to your destination in Wan Chai. Bus fare is 9.3HKD.

Empire Hotel to HKIA, here are two ways for you:
1. Take free shuttle bus line H1 to HK Station, where you can take Express Train to the airport directly. It costs 90HKD/person.
2. Walk from your hotel to Luard Road, Hennessy Road to take bus no. E11 to the airport directly and the bus fare is 21HKD per person.