承诺似轻烟风吹即过誓言如泡沫碰即碎
[chéng nuò sì qīng yān fēng chuī jí guò shì yán rú pào mò pèng jí suì]
This translates to 'Promises are like smoke that vanishes with the wind, vows are like foam that bursts upon contact'. It criticizes empty or easily broken commitments or promises made by people, often implying skepticism towards human reliability or sincerity.