你眼是海却不为我蓝
[nĭ yăn shì hăi què bù wéi wŏ lán]
The literal meaning is 'Your eyes are like the sea but not blue for me.' It metaphorically suggests that although the person's presence is vast and profound (like the ocean), it lacks a particular emotion, possibly affection or love, that would make them special to the user.