一个像夏天一个像秋天却总能把春天变成冬天
[yī gè xiàng xià tiān yī gè xiàng qiū tiān què zŏng néng bă chūn tiān biàn chéng dōng tiān]
'One is like summer and one is like autumn, yet always turns spring into winter' describes people with such opposite personalities, however their interactions somehow bring an end to harmony.