唱着别人的歌流了自己的泪
[chàng zhe bié rén de gē liú le zì jĭ de lèi]
This means 'singing others’ songs and shedding one’s own tears.' It reflects the feeling of empathy while listening or singing to other's music. There are times we may find our experiences in another person's words, hence we feel the emotions that the song expresses, sometimes even becoming moved to tears.