the Jin Empire to the Mongols (1234), Persian history described the conquered country as Khitāy or Djerdaj Khitāy (i.e., "Jurchen Cathay"). The Mongols themselves, in their Secret History (13th century) talk of both Khitans and Kara-Khitans. In about 1340 Francesco Balducci Pegolotti, a merchant from Florence, compiled the Pratica della mercatura, a guide about trade in China, a country he called Cathay, noting the size of Khanbaliq (modern Beijing) and how merchants could exchange silver for Chinese paper money that could be used to buy luxury items such as silk. Words related to Khitay are still used in many Turkic and Slavic languages to refer to China. The ethnonym derived from Khitay in the Uyghur language for Han Chinese is considered pejorative by both its users and its referents, and the PRC authorities have attempted to ban its use. The term also strongly connotes Uyghur nationalism. Cathay and Mangi As European and Arab travelers started reaching the Mongol Empire, they described the Mongol-controlled Northern China as Cathay in a number of spelling variants. The name occurs in the writings of Giovanni da Pian del Carpine (c. 1180–1252) (as Kitaia), and William of Rubruck (c. 1220–c. 1293) (as Cataya or Cathaia). Travels in the Land of Kublai Khan by Marco Polo has a story called "The Road to Cathay". Rashid-al-Din Hamadani, ibn Battuta, and Marco Polo all referred to Northern China as Cathay, while Southern China, ruled by the Song dynasty, was Mangi, Manzi, Chin, or Sin. The word Manzi (蠻子) or Mangi is a derogatory term in Chinese meaning "barbarians of the south" (Man was used to describe unsinicised Southern China in its earlier periods), and would therefore not have been used by the Chinese to describe themselves or their own country, but it was adopted by the Mongols to describe the people and country of Southern China. The name for South China commonly used on Western medieval maps was Mangi, a term still used in maps in the 16th century. Identifying China as Cathay The division of China into northern and southern parts ruled by, in succession, the Liao, Jin and Yuan dynasties in the north, and the Song dynasty in the south, ended in the late 13th century with the conquest of southern China by the Yuan dynasty. While Central Asia had long known China under names similar to Cathay, that country was known to the peoples of