猫有九命终有一死鱼有七忆终会忘记
[māo yŏu jiŭ mìng zhōng yŏu yī sĭ yú yŏu qī yì zhōng huì wàng jì]
'A cat has nine lives but will eventually die; a fish can only remember seven seconds but will eventually forget everything.' It symbolizes the inevitability of life and death and the transient nature of memories.