The Golden Swallow

A poor scholar named Lo Chih Chiu rescues a swallow from three mischievous boys and frees it. The swallow transforms into a mystical female elf named Hsiao Hseuh, who returns the good deed by rescuing Chih Chiu from ruthless warlords. Hsiao Hseuh confronts Chih Chiu and reveals she is a servant of an evil witch queen that feeds on human blood. When the witch discovers Hsiao Hseuh and Chih
Chiu's relationship, she nearly kills him, but spares his life on the condition that Hsiao Hseuh and Chih Chiu separate. However, shortly after the separation, Hsiao Hseuh escapes the witch's lair and reunites with Chih Chiu, albeit in disguise to hide her identity.
(Source:
IMDB)