若相守卟离若相惜卟弃
[ruò xiāng shŏu bŭ lí ruò xiāng xī bŭ qì]
'Do not leave if we are together, do not forsake if we cherish each other.' In simpler words, it implies the determination of the user never to give up on someone or something important if they're together or if there’s any value cherished by both parties.