The Jiyun (Chi-yun; ) is a Chinese rime dictionary published in 1037 during the Song dynasty. The chief editor Ding Du (ä¸Â度) and others expanded and revised the Guangyun. It is possible, according to Teng and Biggerstaff (1971:147), that Sima Guang completed the text in 1067. The Jiyun has 53,525 character entries (Teng & Biggerstaff, 1971: 147), approximately twice as many as the Guangyun, and likewise has 206 rime groups.