After studying Chinese and jazz dance from elementary school, at 17 years old Yeung won a national contest to find new talents, organized by the Taiwainese TV, and shortly after she made several appearances on TV and a bit part in the Taiwanese film of 1985 "Taipei Story", directed by Yang De-Chang. In 1987 she signed a contract with Hong Kong film studio D & B to replace Malaysian action star Yang Zi Qiong and from then she starred in more than 20 martial arts films. From 1994 she combined her appearances in movies with TV series, making more than ten TV productions in only 5 years. Her screen name Cynthia Khan was actually a combination of the names of established Hong Kong stars Cynthia Rothrock and Michelle Khan, whom she replaced in the "In the Line of Duty" movie series.
In the Line of Duty 3
1988
The Perfect Match
1991
Tiger Cage II
1990
The Avenging Quartet
1993
A Serious Shock! Yes Madam!
1993
Split of the Spirit
1987
Sea Wolves
1991
It's Now or Never
1992
Murders Made to Order
1993
In the Line of Duty 5: Middle Man
1990
Taipei Story
1985
Mother Tragedy
1988
Tough Beauty And The Sloppy Slop
1995
Zen of Sword
1992
The Top Lady of Sword
1993
Yes Madam 5
1996
Madam City Hunter
1993
Super Lady Cop
1993
Blade of Fury
1993
The 13 Cold-Blooded Eagles
1993
Super Player
2010
Forbidden Arsenal
1991
Pink Bomb
1993
Flag of Honor
1987
The Inspector Wears Skirts IV
1992
In the Line of Duty 4
1989
Super Cops
1998
Vampire Kid II
1988
δΈζΉεε°Ύθ
1992
The Tale Of A Heroine
1993
Return of Dragon
1998
The Invincible Constable
1993
Queen's High
1990
The Transmigration Romance
1991
The Gods Must Be Funny in China
1994
The Legend of Lu Xiaofeng
2007
Pay Back
2013
Catching Murderer Overseas
2003
Ultimate Revenge
1995
The Boxing King
2002