你是我久已未唱的情歌
[nĭ shì wŏ jiŭ yĭ wèi chàng de qíng gē]
This online name implies that 'You are the love song I have not sung for a long time', which conveys a deep, lasting affection or memory towards someone. The person giving this name may have someone special who has left them and only remains in their memories.