从刻骨到无所谓
[cóng kè gú dào wú suŏ wèi]
Translation: 'From Heartfelt to Indifferent' implies a profound journey through intense emotional stages towards ultimate detachment, indicating deep changes in feelings or views, from being extremely concerned and deeply immersed into becoming carefree, maybe after gaining new perspectives, overcoming challenges, or growing up over time.