沧海一声笑

The above song is in Mandarin by 3 artists like James Wong, Xu Ke and Ta-yu Lo. The theme song of the film, Chong Hoi Yat Sing Siu (滄海一聲笑; A Sound of Laughter in the Vast Sea), was composed by Wong Jim, who also wrote its lyrics, and performed in Cantonese by Sam Hui. Source :https://en.wikipedia.org/wiki/The_Swordsman_(1990_film) The Swordsman or Swordsman is a 1990 Hong Kong wuxia film. The film is adapted from Louis Cha's novel The Smiling, Proud Wanderer.