mm兮爷你是太阳mm不良你是月亮
[mm xī yé nĭ shì tài yáng mm bù liáng nĭ shì yuè liàng]
This translates as 'MM Xi Ye (a male character), you are the sun; MM Liang (a female character), you are the moon'. It metaphorically expresses admiration for a person with two different aspects, one strong and illuminating like the sun, and another mysterious and calming like the moon.