牵强的微笑扯破了嘴角
[qiān qiáng de wēi xiào chĕ pò le zuĭ jiăo]
Translated loosely to 'Forced smiles tore at my mouth corners.' It reflects feelings of emotional strain and inner conflict where putting up a brave face leads to visible distress. It conveys the painful struggle of maintaining composure despite inner turmoil or pain, revealing a deep sense of sadness or resentment.