Popular radio dramas were also adapted for the screen. In fact, when movies needed publicity, they were adapted for the radio. I took part in stories publicizing the movies of Kwan Tak Hing. When his movies were soon to be screened, he would invite writers to adapt them as serialized drama to be broadcast over five days on different stations. Radio Hong Kong was not allowed to do commercial advertising and could agree only to air the play without advertising. When the plays were aired on Rediffusion or Commercial Radio however, at the most exciting point, they would come to a stop, and the audience would be told that in order to find out how the story ended they had to go to the cinema.