According to Wikipedia, this is a TV show about the many people who fled to Hong Kong from Mainland China after the Chinese Civil War who lived as squatters in Kowloon, where the Lion Rock is located. It was broadcast five times, each forming its own series, from 1972 to 1979, 1984 to 1988, 1990, 1992 to 1995, 2006, 2014 to 2020. Each series was a collection of unrelated stories produced by the RTHK (Radio Television Hong Kong), and depicted the life stories of the different social strata set against backgrounds that are now part of Hong Kong history, such as the Shek Kip Mei Fire that burnt down the slums. The TV series featured some of the early work of now-famous film directors such as Ann Hui. The theme song was sung by Hong Kong Cantopop singer Roman Tam. It was composed and arranged by Joseph Koo, with lyrics written by James Wong.
—yada2121