香港商業電台
Chung wanted to resign from Rediffusion and join the USIS, but Rediffusion objected to that. Finally, after discussions between the USIS and Rediffusion, the USIS allowed him to work for Rediffusion, the RTHK and Commercial Radio Hong Kong outside work time. In 1970, Chung joined the Hong Kong Civil Service as a programme officer at the RTHK.