Jurchen script
The Manchu language uses the Manchu script, which was derived from the traditional Mongol script, which in turn was based on the vertically written pre-Islamic Uyghur script. Manchu is usually romanized according to the system devised by Paul Georg von Möllendorff in his book on Manchu grammar. Its ancestor, Jurchen, used the Jurchen script, which is derived from the Khitan script, which in turn was derived from Chinese characters. There is no relation between the Jurchen script and the Manchu script.