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
serve the country with heart and soul - chì xīn bào guó
display only a small part of one 's talent - xiǎo shì fēng máng
the large cups are used and passed around in great frequency - fēi gōng xiàn jiǎ