甜言蜜语不会三心二意不行
[tián yán mì yŭ bù huì sān xīn èr yì bù xíng]
'Flattery Is Unreliable If You Are Not Devoted.' Literally it translates to: Sweet talk won't do if you can't stay committed. It reflects that while affectionate words (like flattery or endearment) sound sweet, genuine relationship should be based on sincere commitment instead of merely pleasing words.