你是我海里那条不死鱼你是我心底那片不死海
[nĭ shì wŏ hăi lĭ nèi tiáo bù sĭ yú nĭ shì wŏ xīn dĭ nèi piàn bù sĭ hăi]
The username translates to 'You are the immortal fish in my sea; you are the eternal ocean in my heart.' It conveys a sense of eternal love or an unbreakable bond where one person's presence is like an enduring element of the other's life.