Heart of Dragon (Chinese: 龍的心, also known in the United Kingdom as Heart of the Dragon) is a 1985 Hong Kong martial arts action comedy film directed by Sammo Hung, and starring Hung, Jackie Chan, Emily Chu and Mang Hoi.
It is also known by the titles as 'The First Mission and Powerman III.
The final scenes were filmed on the building site that was later to become the Regal Riverside Hotel in Sha Tin.
The film is unusual in that although featuring Sammo Hung and Lam Ching-ying, two actors famed for their kung fu abilities, neither actually perform any martial arts. Golden Harvest had wanted Hung to perform fight scenes in the film, but he refused, rationalising "My character was mentally retarded, mentally disabled, so how can you ask me to fall down and suddenly become well again? And fight? They knew my fighting skills and wanted me to be part of the action but I thought that would have completely destroyed the tone of the film, the principles behind the film."
The action is left to Chan and his fellow CID officers, Mang Hoi, Yuen Wah, Chan Lung and Corey Yuen. Despite the relative lack of action scenes, the film was nominated for the Best Action Choreography award at the Hong
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