In May 1992 HK's answer to Madonna, Anita Mui, got slapped round the face in a karaoke bar by film director and suspected mainland Triad Wong Long Lai after she refused to sing for him. Next day, he was attacked with a butcher's knife and later shot and killed in his hospital bed. Within days police were investigating the murder of another filmmaker, Jimmy Choi Chi Ming, gunned down outside his distribution company. A year later the Wan Chai Triad boss, Andely Chan, who was arrested but not charged with Wong's murder, was shot dead with his mechanic at the Macau Grand Prix.
http://www.bbc.co.uk/worldservice/specials/163_wag_globalcrime/page4.shtml