Meant to be a somewhat historical piece, external locations look mostly like large set pieces or are well disguised. One scene, however, takes place on Cheung On Lane. Ruth Winona Tao spies a drug dealer that threatened her previously, walking down Centre Street between Third and High Streets. She turns and follows him on to Cheung On Lane. He kicks her out onto the road, she is saved by cop David Wu, and the baddies make their escape.