山盟海誓谁没听过
[shān méng hăi shì shéi méi tīng guò]
'Shan Meng Hai Shi Shei Mei Ting Guo' can be understood as 'Everyone Has Heard of Those Vows Made in the Name of Mountains and Seas Before', expressing a rather cynical or disenchanted attitude towards overly dramatic vows of love.