Fung started her career as a child actress. In 1956, at age 2 and a half, Fung debuted in Love vs Love (aka Little Sweetheart), written and directed by her father. By age 14, Fung had made more than 300 films, and was a noted stage performer across most of South East Asia. Fung was known as the Shirley Temple of Hong Kong and Chinese Canto Region.
