Most economists and historians today conceive of money in narrow terms –probably because they have grown up in the modern world and are used to oursystem of coins, paper notes, cheques and credit cards. Although economichistorians are generally aware that some earlier societies (in Africa,Scandinavia and elsewhere) used other items as money, they do not usuallypay much attention to these examples. Few realise that the government ofChina, governing an empire of some 60 million people during the Tang dynasty(618–907), implemented a complex financial system that recognised grain,coins and textiles as money. The government received taxes in coin and inkind, produced to specific standards (specific widths and lengths oftextiles) that would then be redistributed, being used for official salariesand military expenses among other expenditures. Although some of thesurviving evidence comes from the Silk Road sites of Turfan, Dunhuang andKhotan in northwest China (where the dry climate has preserved manydocuments and some actual examples of tax textiles), this multicurrencysystem was in use throughout the entire empire during the seventh to tenthcenturies. At the time, Tang China was possibly the largest economy in theworld, rivalled only by the Abbasid Empire (751–1258).