To be honest I had no idea; then I spied the Hong Kong Observatory Radar Station in the background of this shot. Any how, Ekin Cheng's apartment (or, at the very least, its roof) is located atop an abandoned factory, which overlooks the Flea Market and BBQ Ground at Siu Lam. The road running in front of the factory didn't make it on to Street Vie, but there's a Picasa image (thanks to chim8850) which shows the BBQ Ground in the foreground and the abandoned factory in the background.
