失心人忘心人
[shī xīn rén wàng xīn rén]
Heart-Lost Person, Heart-Forgetting Person. Refers to someone who has lost or given up all hope, love, or feeling (Heart-Lost) and the other person choosing or seeming able to forget their feelings or pain (Heart-Forgetting), illustrating stark contrasts in dealing with emotional turmoil after experiencing intense periods together involving mutual affections or hardships