Water over duck's back
Shui Guo Ya Bei is a Chinese idiom. Its pinyin is Shu ǐ Gu ò y ā B è I, which means that there is no trace left after the incident.
Idiom usage
As an object or attribute; used in figurative sentences
Examples
Their kind suggestions were ignored by the dictator. It was too much for him.
Water over duck's back
well armed with armour and weapons - pī jiān zhí ruì
Great drought and bright clouds - dà hàn wàng yún ní
The grass and the trees know the power - cǎo mù zhī wēi
quick flow of writer 's thoughts and imagination - tù qǐ hú luò
mighty wave crashing on a sandy shore - dà làng táo shā