若我良人就陪我情深是你良人才陪你情深
[ruò wŏ liáng rén jiù péi wŏ qíng shēn shì nĭ liáng rén cái péi nĭ qíng shēn]
This phrase roughly translated as If we're meant to be each other's better halves, then I'll share profound emotions with you only as your better half, too. It conveys loyalty in choosing to deeply connect emotionally exclusively with a compatible partner or significant other.