男人善变的永远是心女人善变的仅仅是脸
[nán rén shàn biàn de yŏng yuăn shì xīn nǚ rén shàn biàn de jĭn jĭn shì liăn]
This phrase comments on the difference in how men and women change over time. For men, it’s their hearts that are easily fickle; for women, only their appearances change. This conveys skepticism about the constancy of human feelings, especially in romantic relationships.