情深一寸多伤一寸
[qíng shēn yī cùn duō shāng yī cùn]
Literal meaning is 'One More Inch of Love Leads to One More Inch of Harm'. It conveys the concept that deeper affections could lead to greater pain if those feelings aren't reciprocated or things don't go as desired, highlighting the bittersweet nature of intense feelings.