你的眼睛出卖了你的心
[nĭ de yăn jīng chū mài le nĭ de xīn]
Translated as 'Your Eyes Give Away Your Heart,' the username suggests transparency or openness regarding emotions, hinting indirectly that a person cannot hide true feelings through eye movements, gazes, etc. Even if someone pretends not to care or hides the actual state, his or her eyes will show it clearly to observant ones.