賈誼
In 175 BC, over the objections of Jia Yi, Emperor Wen issued an edict permitting any person to mint money (then only in the form of coins) out of copper and tin. The main beneficiaries of this policy were those with access to copper, including the court official Deng Tong () (see also below), to whom Emperor Wen had given a major copper mine in Yandao (, in modern Yaan, Sichuan), and Liu Pi, the Prince of Wu, whose principality had a major copper mine at Yuzhang (, in modern Nanchang, Jiangxi).