念屿北诗故屿南歌
[niàn yŭ bĕi shī gù yŭ nán gē]
Thinking of North Poems and Recalling South Songs reflects a sense of nostalgia. It implies thinking about the past while in different places or feeling nostalgic about memories formed across two regions, north and south. It expresses the feeling that despite physical distance, old memories are still vivid as ever.