唱起那首迷途里的小情歌
[chàng qĭ nèi shŏu mí tú lĭ de xiăo qíng gē]
It translates to 'Sing That Little Love Song in the Lost Way.' Here, it implies there is a love story or emotion hidden somewhere lost, perhaps reflecting on nostalgia or longing for what could have been during some lost period of their life.