海鸟跟鱼永不可拥抱
[hăi niăo gēn yú yŏng bù kĕ yōng bào]
Meaning 'Seabirds and fish can never embrace.' Inspired by natural reality - a bird skims over sea waves, whereas the fish swims deep underwater – both are lovely yet can't unite forever. Metaphorically speaking, it implies some people/thing have unmatchable distances despite how much both parties try, indicating impossible affection.