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Clifton Ko is a Hong Kong film director, actor, producer and scriptwriter. He entered TV and film industry in late 1970s, firstly worked with director Clifford Choi. In 1982 Ko entered Raymond Wong's the newly founded Cinema City & Films Co., and directed his first film The Happy Ghost in 1984. The film series, like all his major works, is a slapstick comedy with moral teaching, family value, and optimism.