七秒后鱼忘了有猫的记忆
[qī miăo hòu yú wàng le yŏu māo de jì yì]
Based on the belief that fish have a three-second memory span. So it roughly translates as 'After seven seconds, the fish forgot about the cat’. It reflects fleeting experiences and the rapid fading of memories, indicating that everything might pass by and eventually be forgotten quickly in life just like how a goldfish forgets.