终得凉人
[zhōng dé liáng rén]
Translated literally to 'End up becoming a cool/cold individual/person,' it implies achieving an ultimately detached state, emotionally guarded or unaffected over time, as one matures. There may have been an initial vulnerability leading towards developing defenses against potential wounds or simply evolving into someone whose temperament is notably composed under most situations - thus appearing cool and composed but perhaps emotionally distanced from others.