谁在烟云处琴声长
[shéi zài yān yún chŭ qín shēng zhăng]
'Whose music is heard in misty clouds?' This phrase poetically describes music echoing in the distant mist-covered areas, giving the sense of longing and melancholy mixed within beautiful but remote melodies, possibly inspired by classical art where playing the zither is related to refined solitude and spirituality.