流年染指红颜笑
[liú nián răn zhĭ hóng yán xiào]
'Liu Nian Ran Zhi Hong Yan Xiao' implies that the passage of time has stained even the most beautiful smiles. Red beauty means someone (traditionally women) with a rosy face indicating vitality and youth - hence it could imply someone who retains their vivacity over time despite hardships and difficulties.