眉眼带笑泪眼伤情
[méi yăn dài xiào lèi yăn shāng qíng]
Translating roughly to 'Smiles through Eyebrows, Tears in Eyes for Heartbreak', it reflects complex human emotion; perhaps one laughs to cover up sadness or expresses the dual feelings of laughing at joyous things but also feeling sad when remembering past heartache.