What does WeChat nickname Bitter Sand mean?

Wechat is nicknamed bitter sand, which means sand with bitter plot. Bitter sand comes from the song Sailor. There is a song called "Bitter sand blows your face ..." The tone of the whole song mocks the ruthless reality and expresses firm and persistent struggle and inspirational feelings! Wechat nickname is just a name, which is equivalent to giving yourself a nice name and has no other meaning.