就算只有七秒忆也不忘你
[jiù suàn zhĭ yŏu qī miăo yì yĕ bù wàng nĭ]
Even though the memory only lasts seven seconds, I will never forget you. This likely refers to the short-term memory capacity of a goldfish, which is popularly but inaccurately said to be three seconds, implying deep affection towards someone despite fleeting moments of recollection.