爱久会腻深海会溺
[ài jiŭ huì nì shēn hăi huì nì]
'Ai Jiu Hui Ni Shen Hai Hui Nie' translates to 'Love Can Get Tired and Deep Sea Can Drown You'. This suggests that love can turn from intense affection into boredom over time, and deep emotions (represented by the depth of the sea) can lead to feeling overwhelmed or drowning in those emotions.