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Christy Cheung Wing-Yin, was born in Hong Kong to a family of filmmakers.
In 1998, she participated in Andrew Lau's 'Young and Dangerous: The Prequel'.
In 1999, at the age of 14, she auditioned for 'Spacked Out' at Milky Way Image through a friend's introduction and was eventually chosen by director Lawrence Ah-Mon to play the role of 'Sissy'.
Assistant Director Andy Tse (Four Tse Liu-Shut) was most impressed with her performance, feeling that she was the most energetic of the four main actors and completely brought 'Sissy' to life without a script.
After 'Spacked Out' was released in theaters in 2000, she was invited by many directors to participate in more films.
In 2001, after participating in several films, she faded from the spotlight.
Her last film appearance was in 'Gangs 2001' .
"There Is A Secret in My Soup" is based on infamous HK crime case called 'Hello Kitty Murder'.In 1999 three triad gangsters kidnapped,brutally tortured and beat a 23-year old woman named Fan Man-yee for one month until she died.Then they dismembered and cooked the body,threw most of it out with the trash,fed legs and arms to stray dogs and hid the skull inside the head of a giant-sized Hello Kitty doll.
In the god-forsaken satellite city of Tuen Mun, 13-year-old Cookie suspects she's pregnant. Lately things have not been going her way. Her mother left; her father ignores her; her best friend is in reform school; and her boyfriend is off selling bootleg VCDs in bustling Mong Kok. Flanked by her ride-or-dies Banana, Sissy, and Bean-Curd, she journeys into town to find an abortionist.