你从不在乎怎知我用情至深
[nĭ cóng bù zài hū zĕn zhī wŏ yòng qíng zhì shēn]
A sad expression indicating deep love unappreciated by another person. It conveys the message: ‘You have never cared, so how could you understand the depth of my affection?'. It reflects an unequal relationship or unreciprocated love.