心若死海沉不下去
[xīn ruò sĭ hăi chén bù xià qù]
'心若死海沉不下去' translates to 'My heart is like the Dead Sea and cannot sink'. The Dead Sea's high salinity prevents objects from sinking. This implies that while the person feels intense sadness (like being heavy-hearted), the pain is somehow kept afloat or prevented from fully engulfing them.