Ключевые слова: abstract, background, bank, banking, business, buying, cash, cent, china, chinese, coin, collection, column, commercial, concept, copper, currency, deposit, dirty, dollar, exchange, finance, financial, gambling, gold, group, invest, investment, isolated, macro, metal, monetary, money, nickel, object, one, pattern, pile, pound, rich, rmb, sale, save, stock, trade, treasure, wealth, yuan,