Cathay "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. However, its use by Turkic speakers within China, such as the Uyghurs, is considered pejorative by the Chinese authority who had tried to ban it. As European and Arab travelers started reaching the Mongol Empire, they described the Mongol-controlled Northern China
Cathay City Hong Kong International Airport. Cathay City has of space and is one of the largest corporate head office facilities in Asia. Cathay City includes three 10-storey office buildings, a 23-storey staff hotel, a flight training centre with a safety training school, a workshop and storage building, a leisure centre, and an airline stores building. The centre has a steel pedestrian bridge. The head office of Air Hong Kong, as of 2004, is located on the fourth floor of the South Tower of Cathay City. In February 2012 FlightSafety International and Gulfstream Aerospace, in a venture with Cathay Pacific, opened a