With parents coming from Hunan (Henan), originally named Lei Qiu-Si, Shih Szu was born in Taiwan. She joined Shaw Brothers in 1970 and appearing as a martial arts heroine. Acclaimed by a wide range of audience, Shaw Brothers regarded her as the next Cheng Pei-Pei. As such she appeared in many martial arts movies which included The Rescue, The Lady Hermit, Heroes of Sung, The Villains, The Bloody Scape and Lady of the Law etc. Her agility and skills established her position as one of the top female martial arts stars. After starring in A Deadly Secret in 1980, she left Hong Kong and continued her filming career in Taiwan. She retired from the limelight in early 80s.