The Killer - Chow Yun Fat (1989) - Happy Mansion, Mid-levels

Props to Dan Thomas for nailing this location originally, many years ago. This is the location of Jennie's apartment and where the cops catch up with the assassin for the first time. The tall white building in the background of some of the rooftop shots is nearby "Visalia Garden". It looks like the area hasn't changed much except for some of the surrounding buildings to have been given a bit of a spruce up.