鱼忘七秒我忆你几世深情人忆七年我望你几生情深
[yú wàng qī miăo wŏ yì nĭ jĭ shì shēn qíng rén yì qī nián wŏ wàng nĭ jĭ shēng qíng shēn]
The phrase uses a metaphor about fish forgetting things every seven seconds, juxtaposed against the speaker's deep and enduring memory of love for another. It conveys an immense sense of sorrow that despite how easily fish can forget, they, unlike the narrator, find it almost impossible to forget a deep and heart-wrenching romance.