Sam Chan Yu-sum (Chinese: 陳宇琛, born 22 August 1979) is a Hong Kong actor working for TVB. He made his acting career debut in TVB's Hearts Of Fencing in 2003. His father, Shek Sau, also works for TVB. Over the years he was mostly shadowed by his father's fame and only known as Shek Sau's son on screen. In 2005, they appeared in a cooking show together for a Father's Day promotion. People say that he is not given many roles due to his short stature.