你的笑很真很美但不是对我
[nĭ de xiào hĕn zhēn hĕn mĕi dàn bù shì duì wŏ]
It means 'Your smile is so sincere and beautiful but not for me'. The person uses this name to show their admiration and perhaps a tinge of regret or sorrow about someone’s genuine and beautiful smile that isn’t directed at them.