Jurchen script
The earliest written attestation of the language family is in the Jurchen language, which was spoken by the rulers of the Jin dynasty (1115–1234). The Jurchens invented a Jurchen script to write their language based on the Khitan scripts. During this time, several stelae were put up in Manchuria and Korea. One of these, among the most important extant texts in Jurchen, is the inscription on the back of "the Jin Victory Memorial Stele" ("Da Jin deshengtuo songbei"), which was erected in 1185, during the Dading period (1161–1189). It is apparently an abbreviated translation of the Chinese text on the front of the stele. The last known example of the Jurchen script was written in 1526.