三唱三叹儿时曲一曲别离又相遇
[sān chàng sān tàn ér shí qŭ yī qŭ bié lí yòu xiāng yù]
Roughly translated to 'Sing and sigh thrice over childhood songs, one melody of parting yet again reunion', this user implies nostalgia and longing for the past through reminiscence of melodies. There is also suggestion for the theme of meeting after separation. Such a sentence is typical in classic Chinese literature for expressing deep emotion.