Complex sentence: The lyrics of the song was written by the scriptwriter of "Empress Ki", Jung Kyung Soon; and composed and produced by popular music producer "Jae Chong" (also known as Jung Jae-yoon).
Split into simpler sentences: The lyrics of the song was written by the scriptwriter of "Empress Ki", Jung Kyung Soon. The song was composed and produced by popular music producer "Jae Chong" (also known as Jung Jae-yoon).