别用温柔刀
[bié yòng wēn róu dāo]
It translates to 'Don't use the soft knife', a metaphor for someone using kindness and gentleness as a way to harm you emotionally. The word 'gentle' may not seem harmful. In the context of relationships, though, sometimes the most damaging wounds can come from gentle words that are designed to hurt you while leaving no traces of physical scars.