$1!5=!:o(B, $1!5=!FL'T2!4c!:j!Na'CZs - $1'=G'`X'2Fs ($1!4I!0a (B: s $1!4I!0a'<Q'P0!9%':`!3K!JH!Na(B,s, 2015)
Keywords: China--History--Song dynasty, 960-1279.; Office politics--China.