 Since there was "more" metal (or value), these privately produced Ban Liang cash coins by Deng Tong were believed to bring more "happiness" (多福).It is possible that China first began using iron cash coins (鐡錢, "tieqian") during the Western Han dynasty, this was concluded after a number of iron Ban Liang cash coins were unearthed in Western Han era tombs in the Hunanese cities of Hengyang and Changsha between the years 1955 and 1959.Other specimens of iron Ban Liang cash coins were also unearthed in the province of Sichuan.