This phrase stuck with me for days. I think it sticks because a usually very blur friend suddenly made all of us went "hmmm.." with this very "hmmm.." advice.
It is an advice, a rule, a law to follow so that a relationship can stand the test of time.
She said, and I quote, that in a relationship,
男人必须爱他的女人；女人必须了解她的男人。
aka:
A man needs to love his woman; a woman needs to understand her man.
it was on the channel 8 9pm show... this phrase.