旧人旧事久心酸新人新事心感慨
[jiù rén jiù shì jiŭ xīn suān xīn rén xīn shì xīn găn kăi]
'Past People and Events Make One's Heart Sore While New People and Incidents Bring Reflections' reveals deep nostalgia and emotion when comparing old times with present situations. There's a bittersweet feeling toward changes in life, relationships, and how time passes.