Yunjing
The Yunjing (traditional Chinese: 韻鏡; lit. 'Mirror of Rhymes') is one of the two oldest existing examples of a Chinese rhyme table – a series of charts which arrange Chinese characters in large tables according to their tone and syllable structures to indicate their proper pronunciations. Current versions of the Yunjing date to AD 1161 and 1203 editions published by Zhang Linzhi (張麟之). The original author(s) and date of composition of the Yunjing are unknown.