卑微的承诺早已风消云散
[bēi wēi de chéng nuò zăo yĭ fēng xiāo yún sàn]
'Bei Wei De Cheng Nuow Zhang Jiu Feng Xiao Yun San' translates as 'the humble promise has long vanished with the wind.' It suggests a modest or humble promise made at some point is now gone like the wind, conveying regret over an old, unkept vow.