Zhang Zaishan (played by Andy Lau) is a senior inspector in the Explosive Ordnance Disposal Division of the Hong Kong Police Force. Seven years ago, he lurked in the criminal gang of the most wanted criminal, Huo Bao (played by Jiang Wu). During an operation to rob a vault, Zhang Zaishan revealed his identity as an undercover agent in the bomb disposal team and cooperated with the police, successfully preventing the bombing
Zhang Zaishan (played by Andy Lau) is a senior inspector in the Explosive Ordnance Disposal Division of the Hong Kong Police Force. Seven years ago, he lurked in the criminal gang of the most wanted criminal, Huo Bao (played by Jiang Wu). During an operation to rob a vault, Zhang Zaishan revealed his identity as an undercover agent in the bomb disposal team and cooperated with the police, successfully preventing the bombing