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Shock Wave - Cheung Choi-san (Andy Lau) is a superintendent of the Explosive Ordnance Disposal Bureau (EOD). Seven years ago, he went undercover and became the undercover protege to Hung Kai-pang (Jiang Wu), a wanted criminal specializing in bombs. During a cash vault robbery, Cheung revealed his undercover identity and whilst coordinating with the police, successfully disposed a bomb, preventing from being detonated. In the event, Hung’s criminal gang, in the car where Cheung was in, was captured including Hung’s younger brother. However, during the explosive commotions, Hung managed to escape and threatened to return for revenge. (CMC Pictures Holdings)