去 ㄑㄩ ˋ qù 芜 ㄨ ˊ wú 存 ㄘㄨㄣ ˊ cún 菁 ㄐㄧㄥ jīng 去 ㄑㄩ ˋ qù 蕪 ㄨ ˊ wú 存 ㄘㄨㄣ ˊ cún 菁 ㄐㄧㄥ jīng lit. to get rid of the weeds and keep the flowers to separate the wheat from the chaff (idiom)