鱼有一颗心仅有七秒情猫有九条命仅有一颗心
[yú yŏu yī kē xīn jĭn yŏu qī miăo qíng māo yŏu jiŭ tiáo mìng jĭn yŏu yī kē xīn]
'Fish have a heart with only seven seconds (memory) while cats have nine lives but only one heart.' An expression reflecting a perception about different traits between fish and cats. Fish are often said to have short memories (around 7 seconds), symbolizing how love/passion lasts very briefly; while for cats with legendary 'nine lives,' they live many lives yet devote wholeheartedly when loving someone.