New Town Plaza shopping mall in Shatin is one of the largest malls in Hong Kong.
Its phase I has 8 floors of shops and restaurants; phase III has 3 floors; and then the nearby HomeSquare shopping center has 6 floors. The complex comprises a cinema, a hotel (Royal Park Hotel), a supermarket, and the Snoopy World (an outdoor playground for kids).
In addition it's connected to at least two smaller shopping centers - Citylink Plaza and Hilton Plaza.
Since New Town Plaza is connected to the Shatin MTR station, taking the MTR subway will be the easiest. In addition, 'Shatin Railway Station' bus terminal is located right outside, so any buses terminating there from other parts of Hong Kong will work as well.