 Between 976 and 984, a total of 100,000 strings of iron coins was produced in Fujian as well.In 993, for paying the land tax one iron coin was equal to one bronze, for the salary of clerks and soldiers one bronze equalled five iron coins, but in trade ten iron coins were needed for one bronze coin.In 1005, four mints in Sichuan produced over 500,000 strings of iron coins a year.