不求天长地久只求海枯石烂
[bù qiú tiān zhăng dì jiŭ zhĭ qiú hăi kū shí làn]
'No Asking for Everlasting, Just Hoping Till the Sea Runs Dry and Rocks Decay.' This conveys a strong wish for passionate but momentary rather than long-lasting love, signifying intense, transient emotions that deeply mark the soul despite their fleeting nature.