Chow was originally a professional windsurfer and a fashion show model, but chose acting as a career in 2001.
[citation needed] When Duncan was 18, he returned to Hong Kong in a vacation and went casting with a friend, then he was chosen to shoot a Television advertisement for FedEx.
Chow officially started his professional acting career with the 2000s film "I Do", co-starred with Ella Koon, Bobo Chan, Raymond Wong.
In the same year, he played Smiley Dentist in The Shoe Fairy (Mermaid Blossom), co-starred with Vivian Hsu.
The MV contained a lot of hot scenes between Duncan and Xu Naihan, which made it extremely controversy.
[1] Chow also returned back to Hong Kong to participate in a Gary Tang television series named "The Hiddens", co-starring many Hong Kong popular actors and actresses (Jessica Hsuan, Lawrence Ng, Michael Tao, William So).