There are three types of tariffs,specific tariff,ad valorem tariff and compoud tariff.A speicfic tariff is expressed in terms of a fixed amount of money per physical unit of the imported product.

• 有三种主要征收关税的方法：从量税，从价税和复合关税，从量税是按照进口商品的每一实际量单位确定税款来征收的；