 The movie features a famous Cantonese song, "This is Love", sung by Teddy Robin, the producer of this movie.In the United States, the film is marketed under the title God of Killers, capitalizing on Chow's popularity in heroic bloodshed films.Woo Viet, as he is Vietnamese, should actually have the surname of Hồ (as in the "Ho" in Ho Chi Minh) rather than the Cantonese translation of the Hu / Woo / Ho surname.