《管子·轻重乙》
因此，只要他们来我们国家卖粮食，赚取我国的货币，然后，一定会再把我国的货币兑换成黄金运出境。
故苟入吾国之粟，因吾国之币，然后，载黄金而出。
Therefore, as long as they come to our country to sell the grain and earn our country’s currency, then they will certainly have to change our country’s currency into gold to take out of the country.