In the 1960s, Sek began submitting film reviews to The Chinese Student Weekly [zh] at the age of seventeen.
[2] Although his articles were initially rejected, he received a reply letter from the chief editor, Law Kar [zh], who encouraged him to continue writing film reviews.
[2] Sek started his film review column in Ming Pao in January 1971.
[3] Sek directed an experimental film called Dead Knot in 1969, in collaboration with John Woo.
[1] In 2023, Sek received the Professional Achievement Award in the 41st Hong Kong Film Awards, alongside Law Kar, for his contributions in the film industry.