精 ㄐㄧㄥ jīng 选 ㄒㄩㄢ ˇ xuǎn 精 ㄐㄧㄥ jīng 選 ㄒㄩㄢ ˇ xuǎn carefully chosen handpicked best of the bunch choice (product) concentration (mining) to concentrate to winnow