黑白键弹奏谁的忧伤
[hēi bái jiàn dàn zòu shéi de yōu shāng]
'Hei Bai Jian Dan Zhou Shui De You Shang' roughly translates to 'The black and white keys play who's sorrow', referring to the melancholy tunes produced on a piano (whose keys are colored black and white), expressing grief or sadness through music and implying introspection or contemplation.