冷宫再冷也没你心冷
[lĕng gōng zài lĕng yĕ méi nĭ xīn lĕng]
The phrase 'Even the cold palace cannot match the coldness of your heart' refers to someone whose emotional detachment rivals the desolation of ancient imperial cold palaces where out-of-favor concubines were sent. It expresses profound sorrow over someone’s indifference.