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As the 1970s and the era of the martial arts film mania slowed down albeit very slightly, Wu Ma's output as a director also slowed. His acting output, however, increased as he became increasingly well known as a popular character actor. Wu had made appearances in Sammo Hung's 1970s movies (such as "Iron Fisted Monk"), his association with Hung began in earnest in the early 1980s. Wu appeared in "Encounters of the Spooky Kind" (1980). Throughout the 1980s, Wu and Hung had a close working relationship, often with Wu as the director and Hung as the producer (such as "My Cousin The Ghost" (1986)). Wu worked in Hung's production company Bo Ho as the production manager, and made appearances in Hung-directed films during the 1980s, including "Millionaire's Express" (1986) and "Wheels on Meals" (1984).