女人不狠小三入侵男人不毒女人不爱
[nǚ rén bù hĕn xiăo sān rù qīn nán rén bù dú nǚ rén bù ài]
It means if women are not fierce enough, their romantic relationships can be easily interfered by third parties. If a man does not have certain qualities or behaviors, they can fail to capture women's hearts.