Dust and chaff
As a Chinese idiom, CH é ng ò UB ǐ K ā ng in pinyin means dust and dirt, rice bran and millet bran; it is used to refer to humble and useless things. It's from Chuang Tzu's xiaoyaoyou.
The origin of Idioms
Zhuangzi's xiaoyaoyou: "it's his dirt and chaff that made him Yao and shun."
Idiom usage
The dust of my life has been washed away. The poem "bathing in the sea" by Guo Moruo
Dust and chaff
the wine is running out and the guests are departing - jiǔ lán rén sàn
put one 's hand to one 's mouth to hide one 's laughter - yǎn kǒu hú lú