Where within HKIA do we get ferry to macau?then onto gongbei?do we need a visa?ferry schedules pls?

The Sky Pier in HKIA has direct ferry to Macau. You can handle the air-ferry transit in the airport. Your luggage will be sent to the ferry directly. Take the ferry to Macau Marine Ferry Terminal. At the ferry terminal, take bus 3 to Barrer Gate, Gongbei. You can also take taxi, not far away in deed.