我国的货币品类极为繁多，一般可分为古钱、金银币、纸币、铜元等四大门类。仅古钱一类，质有铜、铁、铝、金、银、锡、陶（编者按：还有石、骨、木、玉、铅质等），而铜又有红、青、紫、白、黄之分。历代铜钱，按有明显特点的版别计算，不下数万种。一条古钱纵线，从商钱的贝 China’s currency category is extremely diverse, generally divided into ancient money, gold and silver coins, paper money, copper and other four categories. Only a class of ancient money, quality of copper, iron, aluminum, gold, silver, tin, pottery (Editor’s note: there are stone, bone, wood, jade, lead, etc.), and copper red, White, yellow points. Ancient coins, according to the obvious characteristics of the version of the calculation, no fewer than tens of thousands. An ancient money vertical line, from the money of the shellfish