深水猫死浅水鱼死
[shēn shuĭ māo sĭ qiăn shuĭ yú sĭ]
'A cat dies in deep water and a fish dies in shallow water'—It conveys the idea that everyone has their own challenges in life which can be insurmountable for them, indicating that every creature (and person) has their specific environments in which they cannot thrive.