 His debut film, "The Lady of Mystery" was produced by Runde Shaw, and Law was cast alongside actors such as 
Lee Tiu, Li Xianglan and Zhao Lei.He wrote the script for the 1961 film "The Search Of Loved One " but by 1968 he had moved into directing and writing, directing his first film in this year entitled "A Time for Reunion ", a film which starred Alan Tang who would feature in many of his later films in the 1970s.In the 1970s, John began working under the renowned Hong Kong film studios, Shaw Studio, responsible for producing many of Hong Kong's classic martial arts film during this period.