藏品尺寸　直径：67.01mm 半径：28.55mm 厚：3.07mm 藏品重量：73.2g

明代初期，明太祖朱元璋于洪武元年(公元1368年)，命京城(南京)工部宝源局及各省宝泉局铸行"洪武通宝"，由工部主管铸钱，下设宝源局。朱元璋为避讳元朝的元字，把所铸之钱钱文一律叫通宝而不叫元宝，而不只是为避讳他自己的名字，以后所铸之钱也都没有元宝钱文。洪武通宝钱制沿续元末朱元璋所铸"大中通宝"的形制，分为五等，规定小平钱，每文重一钱，折二钱重二钱，当三钱重三钱，当五钱重五钱，当十钱重一两。同时继铸大中通宝钱。洪武八年，发行"大明宝钞"纸币，规定大明宝钞每贯合铜钱一千文或值银一两，宝钞四贯合黄金一两。并且实行铜钱与宝钞并用的政策，但禁止金银流通，只能向政府兑换。明朝为推行纸币的流通，当年就停止了中央及各地方钱局的铸钱。到第二年全部停铸铜钱。明朝洪武十年，又恢复宝源局与各省钱局铸小钱至洪武二十年后又停铸。洪武二十六年，改变钱制，重新铸五等钱，按洪武元年铸行规定，后又改铜钱每文重一钱两分。其它四等钱，依照小平钱之重递增。洪武二十六年七月只准京师宝源局铸钱，其它各省再次停铸。到八月，因宝钞流通受阻，为坚决实行纸币制度再次禁止使用铜钱。直到明宣宗宣德末年，历时长达四十一年。

In the early Ming Dynasty, Zhu Yuanzhang, the founder of the Ming Dynasty, ordered Baoyuan Bureau of the Ministry of industry of the capital (Nanjing) and Baoquan Bureau of all provinces to cast "Hongwu Tongbao" in the first year of Hongwu (1368 A.D.), and the Ministry of industry was in charge of casting money, under which Baoyuan Bureau was set up. In order to avoid the yuan characters of the Yuan Dynasty, Zhu Yuanzhang called all the money and articles cast as Tongbao instead of Yuanbao, not only to avoid his own name, but also no money and articles cast in the future. Hongwu Tongbao money system is based on the shape of "Dazhong Tongbao" cast by Zhu Yuanzhang at the end of the successive Yuan Dynasty. It is divided into five grades. It is stipulated that Xiaoping money is one yuan for each article, two yuan for each article, three yuan for three money, five yuan for five money, and ten yuan for one or two money. At the same time, it continued to cast Dazhong Tongbao money. In the eighth year of Hongwu's reign, the "Daming banknote" was issued, stipulating that for every one thousand copper coins or one or two silver coins, four of them were one or two gold coins. In addition, the policy of using copper money and banknotes together is implemented, but the circulation of gold and silver is prohibited and can only be exchanged with the government. In order to promote the circulation of paper money in Ming Dynasty, the central and local money bureaus stopped making money in that year. By the next year, all copper coins were stopped. In the ten years of Hongwu in the Ming Dynasty, Baoyuan Bureau and various money saving bureaus resumed casting small money until Hongwu stopped casting 20 years later. In the 26th year of Hongwu, the system of money was changed and the fifth grade money was recast. According to the regulations of Hongwu yuan, the copper money was changed to weigh one yuan and two cents per article. The other fourth-class money increases according to the weight of Xiaoping's money. In July of the 26th year of Hongwu, only the capital Baoyuan Bureau was allowed to cast money, and other provinces stopped casting again. By August, the use of copper money was once again banned in order to resolutely implement the paper money system because the circulation of banknotes was blocked. It lasted for 41 years until the last year of Xuande.